Nicholas Sitar

  • N. Wagner and N. Sitar. “Seismic Earth Pressures on Deep Stiff Walls.” Proceedings of the 2016 Geotechnical and Structural Engineering Congress, ASCE, C.Y. Chandran and M.I. Hoit, editors, Phoenix, AZ, February 14-17, 2016
  • George, M.F. and Sitar, N. “3D Block Erodibility: Dynamics of Rock-Water Interaction in Rock Scour.” UC Berkeley, Geotechnical Engineering, Report No. UCB GT 16-01, January 2016
  • Sitar, N and Wagner N. “On Seismic Response of Stiff and Flexible Retaining Structures.” Invited. Proceedings, 6th International Conference on Earthquake Geotechnical Engineering, Christchurch, New Zealand 1-4 November 2015
  • Cohen-Waeber, J., Lanzafame, R., Bray, J. and Sitar, N. “The Performance of Structures Subjected to Surface Fault Rupture during the Mw 6.0 South Napa Earthquake, California, USA.” Proceedings, 6th International Conference on Earthquake Geotechnical Engineering, Christchurch, New Zealand 1-4 November 2015

  • Wagner, N., Bray, J.D. and Sitar, N. “Ground Deformations in the Very Near Fault Region during the M6.0 South Napa Earthquake.” Proceedings, 6th International Conference on Earthquake Geotechnical Engineering, Christchurch, New Zealand 1-4 November 2015

  • Bray, J.D., Cohen-Waeber, J., Dawson, T., Kishida, T. and Sitar, N. editors. “Geotechnical Engineering Reconnaissance of the August 24, 2014 M6 South Napa Earthquake” Geotechnical Extreme Event Reconnaissance Association (GEER) Report GEER 037, 
  • Zimmer, V.L. and N. Sitar, "Detection and Location of Rock Falls Using Seismic and Infrasound Sensors," Engineering Geology, July 2015, Vol. 193, pp. 49–60, doi: 10.1016/j.enggeo.2015.04.007.http://www.sciencedirect.com/science/article/pii/S0013795215001234
  • George, M.F. and Sitar, N. “Experimental evaluation of rock erosion in spillway channels.” Proc. of the 49th U.S. Rock Mechanics Symposium (ARMA), San Francisco, CA, June 28-July 1, 2015.
  • Drosos, V. and Sitar, N. “Soil-Structure Interaction Effects on Seismically Isolated Nuclear Power Plants.” International Foundations Congress and Equipment Expo 2015, San Antonio, Texas, March 17-21, 2015 IFCEE 2015: pp. 63-73. doi: 10.1061/9780784479087.00
  • Candia, G., Sanhueza, C. and Sitar, N. “Evaluación del empuje sísmico en muros de contención en base a un perfil de aceleraciones de campo libre” Proceedings of the 8th Chilean Geotechnical Engineering Symposium, Santiago, Chile, November, 26-28, 2014.
  • Geraili Mikola, R. and Sitar, N. “3D Simulation of Tsunami Wave Induced by Rock Slope Failure Using Coupled DDA-SPH” 48th US Rock Mechanics/Geomechanics Symposium, Minneapolis, MN, USA, 1-4 June 2014.
  • George, M.F., Sitar, N. and Der Kiureghian, A. “System Reliability Analysis of Rock Scour,” Proc. of the 34th United States Society on Dams (USSD) Conf., San Francisco, CA, USA, April 2014, pp. 478-494.
  • Geraili Mikola, R. and Sitar, N. “Next generation discontinuous rock mass models: 3-D and rock-fluid interaction”, Proceedings, ICADD 11: Frontiers of Discontinuous Numerical Methods and Practical Simulations in Engineering and Disaster Prevention, Chen, Ohnishi, Zheng & Sasaki (Eds), Taylor & Francis Group, London, ISBN: 978-1-138-00110-7, 2013 (Invited Keynote)
  • Candia Agusti, G. and Sitar, N. “Seismic Earth Pressures on Retaining Structures in Cohesive Soils.”  Report submitted to the California Dept. of Transportation (Caltrans), Report No. UCB GT 13-02, August 2013, 161p
  • Geraili Mikola, R. and Sitar, N. “Explicit Three Dimensional Discontinuous Deformation Analysis for Blocky System”, Proc. from the 47rd U.S Rock Mechanics Symposium (ARMA), June, San Francisco, CA, USA, 2013, Paper #13-416, 8p.
  • George, M.F. and Sitar, N. “Block Theory Application to Unlined Rock Spillway Erodability Assessment”. Proc. from the 47rd U.S Rock Mechanics Symposium (ARMA), June, San Francisco, CA, USA, 2013, Paper #13-600, 8p.
  • Candia, G., Geraili Mikola, R. and Sitar, N. “Seismic earth pressures on displacing retaining wall inclay soil with slope ground (GC02)”, Network for Earthquake Engineering Simulation (database), Dataset, 2013, DOI:10.4231/D34746R4K
  • ​ Candia, G., Geraili Mikola, R. and Sitar, N. “Seismic earth pressures on braced wall and displacing retaining wall in clay (GC01)”, Network for Earthquake Engineering Simulation (database), Dataset, 2013, DOI:10.4231/D37W67572
  •  Geraili Mikola, R., Candia, G. and Sitar, N. “Seismic earth pressures on non-displacing and displacing retaining wall in sand (Rooz02)”, Network for Earthquake Engineering Simulation (database), Dataset, 2013, DOI:10.4231/D3CN6Z00Z
  • Geraili Mikola, R., Candia, G. and Sitar, N. “Seismic earth pressures on braced wall in sand (Rooz01)”, Network for Earthquake Engineering Simulation (database), Dataset, 2013, DOI:10.4231/D3HD7NS4P
  • ​Geraili Mikola, R. and Sitar, N. “Seismic Earth Pressures on Retaining Structures in Cohesionless Soils.” Report submitted to the California Department of Transportation (Caltrans), Report No. UCB GT 13-01, March 2013.
  • George, M.F and Sitar, N. “Scour of Discontinuous Blocky Rock”. Proc. of the 33rd United States Society on Dams (USSD) Conf., February, Phoenix, AZ, USA, 2013.
  • Kim, J.M. and Sitar, N. “Reliability approach to slope stability analysis with spatially correlated soil properties.” Soils and Foundations, 53(1),1-10, 2013.
  • Kim, J.M. and Sitar, N. “Probabilistic Evaluation of Seismically Induced Permanent Deformation of Slopes”, Soil Dynamics and Earthquake Engineering 44 (2013) 67-77 (in press).
  • George, M.F. and Sitar, N. “Evaluation of Rock Scour using Block Theory”. Proc. of the 5th International Conference on Scour and Erosion (ICSE), November, Paris, France, 2012.
  • George, M.F and Sitar, N. “Application of Block Theory to Rock Scour Assessment”. Program with Abstracts, The Association of Environmental & Engineering Geologists (AEG) Annual Meeting, September, Salt Lake City, UT, USA, 2012. (abstract).
  • Verdugo, R., Sitar, N, Frost, J.D., Bray, J.D., Candia, G., Eldridge, T., Hashash, Y., Olson, S.M., and Urzua, A., (2012), "Seismic Performance of Earth Structures: Dams, Levees, Tailings Dams and Retaining Walls," Earthquake Spectra, Volume 28, Issue S1, Page S75-S96, June, ISSN: 8755-2930.
  • Kelson, K., Witter, R., Tassara, A., Ryder, I., Ledezma, C., Montalva, G.A., Frost, J.D., Sitar, N., Moss, R., and Johnson, L., (2012), "Patterns of Tectonic Surface Deformation during the 2010 Maule Earthquake and Influences on Damage to Engineered Facilities" Earthquake Spectra, Volume 28, Issue S1, Page S39-S54, June, ISSN: 8755-2930.
  • Sitar, N. and Hausler, E. "Influence of Ground Improvement on Liquefaction Induced Settlement: Observations from Case Histories and Centrifuge Experiments," International Journal of Geo-Engineering, 4(2), 5-15, June 2012.
  • George, M.F. and Sitar, N. "Block Theory Application to Scour Assessment of Unlined Rock Spillways," Geotechnical Engineering, Dept. of Civil and Env. Engrg., UC Berkeley, Report UCB GT 12-02, May, 2012.
  • Rickard, O.C. and Sitar, N. "bSLOPE: A General Limit Equilibrium Slope Stability Analysis Code for iOS," Dept. of Civil and Env. Engrg., UC Berkeley, Report UCB GT 12-01, May, 2012.
  • Cobos Roa, D., Shriro, M., Sitar, N., Bray, J.D., Bawden, G., Lichter, J., Evans, R. “3-D Stratigraphy and Root Geometry from Trench and Ground-Based Lidar Mapping, GeoCongress 2012, Geotechnical Special Publication No. 225, Hryciw, R.D., Athanastopoulos-Zekkos, A. and Yesiller, N., editors, ASCE, 2012, pp. 3031-3040.
  • Sitar, N., Geraili Mikola, R., and Candia, G. “Seismically Induced Lateral Earth Pressures on Retaining Structures and Basement Walls”, Keynote Lecture, Geotechnical Engineering State of the Art and Practice, Keynote Lectures from GeoCongress 2012, GSP 226, ASCE, 2012.
  • Zimmer, V.L, Collins, B.D., Stock, G.M., and Sitar, N. “Rock fall dynamics and deposition: an integrated analysis from the 2009 Ahwiyah Point rock fall, Yosemite National Park, USA,” Earth Surface Processes and Landforms 37, 680-691, 2012. DOI: 10.1002/esp.3206
  • Wang, G. and Sitar, N. “ Static and Dynamic Axial Response of Drilled Piers. II: Numerical Simulation.”  J. of Geotech. and Geoenvir. Engrg., ASCE, Vol. 137, No. 12, December, 2011, pp. 1143-1153.
  • Wang, G., Kasali, G. and Sitar, N.” Static and Dynamic Axial Response of Drilled Piers. I: Field Tests.”  J. of Geotech. and Geoenvir. Engrg., ASCE, Vol. 137, No. 12, December, 2011, pp. 1133-1142.
  • Shriro, M., Cobos Roa, D., Bray, J.D., Sitar, N., Lichter, J., Evans, R.,  Kroll, R. "Study of Levee Seepage and Slope Stability in Relation to Roots,"  Association of Dam Safety Officials Conference, Washington D.C., September, 2011.
  • Collins, B.D. and Sitar N. “Stability of Steep Slopes in Cemented Sands.” J. Geotech. and Geoenvir. Engrg., ASCE, Volume 137, No. 1, January 2011, pp. 43-51.
  • Al Atik, L. and Sitar, N. “Seismic Earth Pressures on Cantilever Retaining Structures.” J. Geotech. and Geoenvir. Engrg., ASCE, Volume 136, No. 10, October 2010, pp. 1324-1333.
  • Lew, M., Sitar, N., Al Atik, L., Pourzanjani, M., Hudson, M.B. “Seismic Earth Pressures on Deep Building Basements.” Structural Engineers Association of California, Proceedings of the Annual Convention, September, 2010.
  • Lew, M., Sitar, N., and Al Atik, L. “Seismic Earth Pressures: Fact or Fiction.” Invited Keynote Paper, Earth Retention Conference, ER 2010, ASCE, Seattle, August, 2010.
  • Al Atik, L. and Sitar, N. “Numerical Study of Seismic Earth Pressures in Centrifuge Model Experiments.” Proc. 9th U.S. National and 10th Canadian Conf. on Earthquake Engineering, July 25-29, 2010, Toronto, Ont., Canada, Paper No. 968.
  • Collins, B. and Sitar, N. “Geotechnical Properties of Cemented Sands in Steep Slopes.” J. of Geotech. and Geoenvir. Engrg, ASCE, Vol. 135, No. 10, October, 2009, pp. 1359-1366.
  • Al Atik, L. and Sitar, N. “Seismically Induced Lateral Earth Pressures: A New Approach. Proceedings”, 17th Int. Conf. on Soil Mechanics and Geotechnical Engineering, Alexandria, Egypt, Oct. 2009.
  • Sitar, N. and Al Atik, L. “On Seismic Response of Retaining Structures.” Proceedings, Int. Conf. on Performance Based Earthquake Geotechnical Engineering, IS Tokyo 2009, June 2009.
  • Jimenez-Rodriguez, R. and Sitar, N. “The importance of distribution types on finite element analyses of foundation settlement”, Computers and Geotechnics, Elsevier, Vol. 36, No. 3, April 2009, pp. 474-483.
  • Al Atik, L. and Sitar, N. “Experimental and Analytical Study of Seismic Performance Retaining Structures.” PEER Report 2008/104, UC Berkeley, March 2009.
  • Jimenez-Rodriguez, R. and Sitar, N. “Influence of Stochastic Discontinuity Network Parameters on the Formation of Removable Blocks in Rock Slopes”, Rock Mechanics and Rock Engineering, Springer Verlag, Vol. 41, No. 4, August 2008, pp. 563-585.
  • Collins, B.D. and Sitar, N. “Processes of coastal bluff erosion in weakly lithified sands, Pacifica, California, USA”, Geomorphology, Vol. 97, Issues 3-4, 15 May 2008, pp. 483-501.
  • Al Atik, L. and Sitar, N. “Dynamic Centrifuge Study of Seismically Induced Lateral Earth Pressures on Retaining Structures”, Proceedings, GEESD IV, Sacramento, CA, May, 2008, ASCE GSP 181, 2008.
  • Collins, B.D. and Sitar, N. “New Approaches to Stability Analysis of Steep Coastal Bluffs”, Proceedings, GeoCongress 2008: Geosustainability and Geohazard Mitigation (GSP 178), ASCE, New Orleans, March 9-12, 2008, pp. 507-513.
  • Collins, B. D., Kayen, R., Reiss, T., and Sitar, N., 2007. Terrestrial Lidar Investigation of the 2003 and 2007 Activations of the Northridge Bluff Landslide, Daly City, California: U.S. Geological Survey, Open File Report 2007-XXXX,  [http://pubs.usgs.gov/of/2007/XXXX/ ].
  • Jimenez-Rodriguez, R. and Sitar, N. “Rock Wedge Stability Analysis Using System Reliability Methods”, Technical Note, Rock Mechanics and Rock Engineering, Springer Verlag, Vol. 40, No. 4, August 2007, pp. 419-427.
  • Al Atik, L. and Sitar, N. “Development of Improved Procedures for Seismic Design of Buried and Partially Buried Structure”, Pacific Earthquake Engineering Research Center Report, PEER 2007/06, June 2007, 170 p.
  • Al Atik L. and Sitar, N. "Dynamic centrifuge study of seismically induced lateral earth pressures," Proceedings, 4th International Conference on Earthquake Geotechnical Engineering, Thessaloniki, Greece, June 25-28, 2007.
  • Collins, B.D., Kayen, R. and Sitar, N. “Process-based empirical prediction of landslides in weakly lithified coastal cliffs, San Francisco, California, USA,” in McInnes, R., Jakeways, J., Fairbank, H., Mathie, E., eds., Landslides and climate change-Proceedings of the International Conference on Landslides and Climate Change, Isle of Wight, United Kingdom, May 2007: London, Taylor & Francis, p. 175-184, 2007.
  • Wang, G., Li, S., Nguyen, H-N. and Sitar, N., “Effective Elastic Stiffness for Periodic Masonry Structures via Eigenstrain Homogenization, ASCE, Journal of Materials in Civil Engineering,Vol. 19, No. 3, March 2007, pp. 269-277.
  • Wang, G. and Sitar, N., “Nonlinear Analysis of a Soil-Drilled Pier System under Static and Dynamic Loading, Pacific Earthquake Engineering Research Center Report, PEER 2006/06, November 2006, 183 p.
  • Jimenez-Rodriguez, R. and Sitar, N., “A spectral method for clustering of rock discontinuity sets”, International Journal of Rock Mechanics and Mining Sciences, v 43, n 7, October, 2006, p 1052-1061.
  • Jimenez-Rodriguez, R. and Sitar, N., “Inference of discontinuity trace length distributions using statistical graphical models”, International Journal of Rock Mechanics and Mining Sciences, v 43, n 6, September, 2006, p 877-893.
  • Jimenez-Rodriguez, R., Sitar, N.; and Chacon, J., “System reliability approach to rock slope stability”, International Journal of Rock Mechanics and Mining Sciences, v 43, n 6, September, 2006, p 847-859.
  • Doolin, D.M. and Sitar, N., Wildfire Monitoring Using Wireless Sensor Networks, Fire Management Today, Spring 2006, Vol. 66, No. 2, 44-47.
  • Wang, G. and Sitar, N., “Nonlinear Finite Element Analysis of Drilled Piers Under Dynamic and Static Axial Loading,” Proceedings of the 8th U.S. National Conference on Earthquake Engineering, April 18-22, 2006, San Francisco, California, USA, Paper No. 1452. (CD)
  • Kasali, G. and Sitar, N., “Field Evaluation of Axial Response of Drilled Shafts to Dynamic Loads,” Proceedings of the 8th U.S. National Conference on Earthquake Engineering, April 18-22, 2006, San Francisco, California, USA, Paper No. 1428. (CD)
  • Nova-Roessig, L. and Sitar, N., “Centrifuge Model Studies of the Seismic Response of Reinforced Soil Slopes” Journal of Geotechnical and Geoenvironmental Engineering, Vol. 132, No. 3, March 1, 2006.
  • Wang G, Liu X.H., Li S.F., Sitar, N., “Smart element method II. An element based on the finite Eshelby tensor,” Int. J. for Numerical Methods in Engineering, 64 (10): 1303-1333, Nov. 2005.
  • JimŽnez-Rodr’guez, R.,  Sitar, N., and Chac—n, J. “Caracterizaci—n de discontinuidades en macizos rocosos mediante modelos gr‡ficos probabil’sticos” [Characterization of discontinuities in rock masses by means of probabilistic graphical models], MŽtodos NumŽricos en Ingenier’a 2005, J.L. PŽrez Aparicio, A. Rodr’guez Ferr‡n, J.A.C. Martins, R. Gallego and J. CŽsar de S‡ editors, SEMNI, Sociedad Espa–ola de MŽtodos NumŽricos en Ingenier’a, publisher, Extended abstract in Proceedings; full paper on CD-ROM, 2005.
  • Jimenez-Rodriquez R., Sitar, N., and Bartlett, P. "Maximum likelihood estimation of trace length distribution parameters using the EM algorithm", in Prediction, Analysis and Design in Geomechanical Applications: Proceedings of the Eleventh International Conference on Computer Methods and Advances in Geomechanics (IACMAG-2005), G. Barla and M. Barla, eds., Torino, Italy, 19-24 June, 2005, pp. 619-626.
  • Jimenez-Rodriguez R. and Sitar, N. "Probabilistic identification of removable wedges in rock slopes: Influence of stochastic model parameters,” GeoEngineering Report No. UCB/GE-2005/02, May 2005, 51 p.
  • Jimenez-Rodriguez R. and Sitar, N. "Maximum likelihood inference of discontinuity trace lengths based on observations at rock outcrops”, GeoEngineering Report No. UCB/GE-2005/01.
  • Jimenez-Rodriguez R. and Sitar, N. "Probabilistic identification of removable wedges in rock slopes: Influence of stochastic model parameters, Proceedings, Eurorock 2005 - Impact of Human Activity on Geological Environment, P. Konecny ed., A.A. Balkema, Netherlands, May 2005.
  • JimŽnez-Rodr’guez R. and Sitar N., "Probabilistic rock wedge stability analysis using system reliability methods", Paper J0880, CD Proceedings 2005 International Conference on Landslide Risk Management, Editors O. Hungr and R. Fell, R. Couture, and E. Eberhardt, Vancouver, BC, Canada, June 2005.
  • Collins, B.D., and Sitar, N., "Failure Mode Identification and Hazard Quantification for Coastal Bluff Landslides," Proceedings 2005 International Conference on Landslide Risk Management, Editors O. Hungr and R. Fell R. Couture, and E. Eberhardt, Vancouver, BC, Canada, June 2005, pp. 487-496.
  • Sitar, N., MacLaughlin, M.M., and Doolin, D.M., “Influence of Kinematics on Landslide Mobility and Failure Mode”, Journal of Geotechnical and Geoenvironmental Engineering, Vol. 131, No. 6, June, 2005.
  • Tsesarsky, M., Hatzor, Y., and Sitar, N., "Dynamic displacement of a block on an inclined plane: Analytical, experimental and DDA results", Rock Mechanics and Rock Engineering, v 38, n 2, April, 2005, p 153-167
  • Doolin, D.M., and Sitar, N."Wireless Sensors for Wildfire Monitoring," Smart Structures and Materials 2005: Sensors and Smart Structures Technologies for Civil, Mechanical, and Aerospace Systems, M. Tomizuka ed., Proceedings of SPIE, Vol. 5765, San Diego, CA, March 2005.
  • Collins, B.D., and Sitar, N., "Monitoring of Coastal Bluff Stability Using High Resolution 3D Laser Scanning" in Site Characterization and Modeling, Geotechnical Special Publication No. 138, ASCE, GeoInstitute, January, 2005.
  • Kayen, R., Thompson, E., Minasian, D., Moss, R.E.S., Collins, B.D., Sitar, N., Dreger, D., and Carver, C., “Geotechnical Reconnaissance of the 2002 Denali Fault, Alaska, Earthquake,” Earthquake Spectra, EERI, Vol. 20, No. 3, August 2004, pp. 639-667.
  • Wang, G. and Sitar, N., “Numerical Analysis of Piles in Elasto-Plastic Soils Under Axial Loading,” Proc. 17th Eng. Mech. Conf., ASCE, Newark, DE, June 13-16, 2004.
  • Jimenez-Rodriguez, R. and Sitar N., “Identification of Rock Conditions for Tunnel Support Using a Statistical Classification Approach,” Proc. 39th Annual Symp. On Eng. Geology and Geot. Engineering, Butte, MT, May 18-21, 2004, 257-268.
  • Collins, B.D. and Sitar, N., “Application of High Resolution 3D Laser Scanning to Slope Stability Studies,” Proc. 39th Annual Symp. On Eng. Geology and Geot. Engineering, Butte, MT, May 18-21, 2004, 79-92.
  • Kayen, R., Thompson E., Minasian D., Collins B., Moss E.R.S., Sitar, N., Carver, G. “Geotechnical Observations of the November 3, 2002 M7.9 Denali Fault Earthquake,”Proceedings, Fifth International Conf. on Case Histories in Geotechnical Engineering, New York, NY, April 13-17, 2004.
  • Doolin, D.M. and Sitar, N., “Time Integration in Discontinuous Deformation Analysis,” J. of Eng. Mech., ASCE, March 2004, 249-258.
  • Kim, J. and Sitar, N., “Direct Estimation of Yield Acceleration in Seismic Slope Stability Analyses, J. of Geotech. and Geoenv. Engineering, ASCE, Jan. 2004, 111-115.
  • Khazai, B. and Sitar, N., “Evaluation of Factors Controlling Earthquake-Induced Landslides Caused by Chi-Chi Earthquake and Comparison with the Northridge and Loma Prieta Events,” Engineering Geology, Volume 71, Issues 1-2, January 2004, Pages 79-95.
  • Harp, E.L., Jibson R.W., Kayen R.E., Keefer D.K., Sherrod B.L., Carver G.A., Collins B.D., Moss R.E.S., Sitar N., “Landslides and Liquefaction triggered by the M7.9 Denali Fault Earthquake fo 3 November 2002”, GSA Today, August, 2003 pp.4-10.
  • Jimenez-Rodriguez, R. and Sitar, N., “Probabilistic Analysis of Unstable Wedges in Excavations,” Proceedings, ICASP 9, San Francisco, CA, July 2003, pp. 1301-1308.
  • Kim, J. and Sitar, N., “Importance of Spatial and Temporal Variability in the Analysis of Seismically-Induced Slope Deformation,” Proceedings, ICASP 9, San Francisco, CA, July 2003, 1315-1322.
  • Eberhart-Phillips D, Haeussler PJ, Freymueller JT, Frankel AD, Rubin CM, Craw P, Ratchkovski NA, Anderson G, Carver GA, Crone AJ, Dawson TE, Fletcher H, Hansen R, Harp EL, Harris RA, Hill DP, Hreinsdottir S, Jibson RW, Jones LM, Kayen R, Keefer DK, Larsen CF, Moran SC, Personius SF, Plafker G, Sherrod B, Sieh K, Sitar N, Wallace WK. “The 2002 Denali Fault earthquake, Alaska: a large magnitude, slip-partitioned event. Science, vol.300, no.5622, 16 May 2003, pp.1113-18.
  • Doolin, D.M. and Sitar, N., “Displacement Accuracy of the DDA Method Applied to a Sliding Block,” J. of Eng. Mech., ASCE, Nov. 2002, 1158-1168.
  • Hausler, E.A., N. Sitar, O. Matsuo and M. Okamura, “Remediation Zone Geometry Under Shallow Foundations: A Comparison of Model Tests on Two Dynamic Centrifuges,” Proceedings, International Conference on Physical Modelling in Geotechnics, St. John's, Newfoundland, Canada, July 10-12, 2002, 557-562.
  • Mok, C.M., Sitar, N., and Der Kiureghian, A, "Improving Accuracy of First-order Reliability Estimate by Importance Sampling Simulations", Fourth International Conference on Calibration and Reliability in Groundwater Modelling-a few steps closer to reality, Prague, Czech Republic, 17-20 June, 2002, IAHS, Modelcare 2002.
  • Ashford, S.A. and Sitar, N., “Simplified Method for Evaluating Seismic Stability of Steep Slopes,” J. of Geotech. And Geoenv. Engineering, ASCE, February 2002, V128, N2, 119-128.
  • Ashford, S.A. and Sitar, N., "Effect of Element Size on the Static Finite Element Analysis of Steep Slopes," Int. J. for Numerical and Analytical Methods in Geomechanics, V25, N14, Dec. 2001, 1361-1376.
  • MacLaughlin, M., Sitar, N., Doolin, D. and Abbot, T., "Investigation of Slope-Stability Kinematics Using Discontinuous Deformation Analysis," Int. Journal of Rock Mech. & Mining Sciences, July 2001, V38, N5, 753-762.
  • Doolin, D.M. and Sitar, N., “Numerical accuracy of the DDA solution algorithm: a single sliding block case.” In: Rock Mechanics in the National Interest, Proc. 38th U.S. Rock Mechanics Symposium, Washington D.C., July 5-7, 2001,Balkema, Rotterdam, pp. 1429-1435.
  • Sitar, N. and Khazai, B., "Characteristics of Seismically Induced Landslides in Recent Earthquakes," Invited Keynote Paper, Proc. Int. Conf. on Landslides: Causes, Impacts and Countermeasures, M. Kuhne et al., editors, Verlag Gluckauf GmbH, Essen, 2001, 227-237.
  • Sitar, N., Bardet, J.P., Lin, M-L., Hu, J., Hung, J-J., Khazai, B., Kramer, S.L., Perkins, W.J., and Wright, R.H. (2001).  "Landslides", in Chi-Chi, Taiwan Earthquake of September 21, 1999, Reconnaissance Report, Uzarski J. and Arnold, C., eds., Earthquake Spectra, Vol.17, Supplement A, 61-76.
  • Kelson, K.I., Bray, J.D., Cluff, L., Harder, L., Kieffer, S., Lettis, W., Page, W., Perkins, W., Rix, G., Roblee, C., Sitar, N., Wells, D., Wright, R.H., and Yashinsky M. (2001). "Fault Related Surface Deformation", in Chi-Chi, Taiwan Earthquake of September 21, 1999, Reconnaissance Report, Uzarski J. and Arnold, C., eds., Earthquake Spectra, Vol.17, Supplement A, 19-36.
  • Doolin, D.M. and Sitar, N., "DDAML - discontinuous deformation analysis markup language," Int. J. of Rock Mechanics and Mining Sciences, V38, N3, April, 2001, 467-474.
  • Hausler, E.A. and Sitar, N., 2001. “Performance of Soil Improvement Techniques in Earthquakes”, Proc. of the Fourth Int. Conf. on Recent Advances in Geotechnical Earthquake Engineering and Soil Dynamics, Paper 10.15, San Diego, CA, March 26 - 31, 2001, 6 p.
  • Zornberg, J.G., Sitar, N. and Mitchell, J.K., "Performance of geosynthetic reinforced slopes at failure - Closure," J. of Geot. and Geoenv. Engrg., V126, N3, March, 2001, 285-286.
  • Khazai, B. and Sitar, N., "Assessment of Seismic Slope Stability Using GIS Modeling," Geographic Information Sciences, Vol.5, No. 2, 2000, 121-128.
  • Grubb, D.G. and Sitar, N., "Mobilization of Trichloroethylene (TCE) During Ethanol Flooding in Uniform and Layered Sandpacks," Water Resources Research, AGU, 1999, 35(11), 3275-3290.
  • Grubb, D.G. and Sitar, N., "Horizontal Ethanol Floods in Clean, Uniform and Layered Sandpacks under Confined Conditions," Water Resources Research, AGU, 1999, 35(11), 3291-3302.
  • MacLaughlin, M.M. and Sitar, N., "A Gravity Turn-On Routine for DDA,"  Proc. Third Int. Conf. on Analysis of Discontinuous Deformation, B. Amadei ed., ARMA, Washington, 1999, pp. 65-74.
  • Sitar, N., and Nova-Roessig, L., "A Review of Experimental Studies of Seismic Behavior of Reinforced Soil Structures," Invited Paper, Proc. of the Second Int. Conf. on Earthquake Geotechnical Engineering, Seco e  Pinto ed., Balkema, Rotterdam, 1999, pp. 1083- 1088.
  • Nova-Roessig, L., and Sitar, N., "Centrifuge Model Studies of the Seismic Response of Reinforced Soil Slopes," Proc. of the Second Int. Conf. on Earthquake Geotechnical Engineering, Seco e  Pinto ed., Balkema, Rotterdam, 1999, pp. 679-684.
  • Rau, G.A., and Sitar, N., “Post-Cyclic Response of Holocene Bay Mud from San Francisco,” in Geotechnical Engineering and Soil Dynamics, P.Dakoulas, M. Yegian, R.D. Holtz, editors, Geotechnical Special Publication No. 57, ASCE, 1998, Vol. 1, pp. 246-257.
  • Nova-Roessig, L., and Sitar, N., “Centrifuge Studies of Seismic Response of Reinforced Soil Slopes,” in Geotechnical Engineering and Soil Dynamics, P.Dakoulas, M. Yegian, R.D. Holtz, editors, Geotechnical Special Publication No. 57, ASCE, 1998, Vol. 1, pp. 458-468.
  • Zornberg, J.G., Sitar, N., and Mitchell, J.K., “Limit Equilibrium as a Basis for Design of Geosynthetically Reinforced Slopes,” J. of Geotechnical and Geoenvironmental Engrg., ASCE, Aug. 1998, Vol. 124, No. 8, pp. 684-698.
  • Zornberg, J.G., Sitar, N., and Mitchell, J.K., “Performance of Geosynthetically Reinforced Soil Structures at Failure,” J. of Geotechnical and Geoenvironmental Engrg., ASCE, Aug. 1998, Vol. 124, No. 8, pp. 670-683.
  • Nova-Roessig, L. and Sitar, N., "The Seismic Response of Reinforced Soil Slopes:  A Progress Report," Proc. of the 5th Caltrans Seismic Research Workshop, Sacramento, CA, June 16-18, 1998.
  • Sitar, N. and MacLaughlin, M.M., "Kinematics and Discontinuous Deformation Analysis of Landslide Movement," Invited Keynote Lecture in Session on Mass Movement, Proc. 2nd Pan-Am. Symp. on Landslides,  Rio de Janeiro, Brazil, 10-14 Nov., 1997, Vol. 3, pp.65-73.
  • Zornberg, J.G., Mitchell, J.K. and Sitar, N., “Testing of Reinforced Slopes in a Geotechnical Centrifuge,” Geotechnical Testing Journal, ASTM, 1997, V20 N4: 470-480.
  • Sitar, N., Ashford, S.A., Stewart, J.P. and Nova-Roessig, L., “Seismic Response of Steep Natural Slopes, Structural Fills, and Reinforced Soil Slopes and Walls,” Invited Paper, in  Seismic Behavior of Ground and Geotechnical Structures, Seco e Pinto, ed., Proceedings of a Special Technical Session on Earthquake Geotechnical Engineering at the Fourteenth Int. Conf. on Soil Mechanics and Foundation Engineering, Hamburg, Germany, 1997, A.A. Balkema, pp. 341-350.
  • Zornberg, J.G., Sitar, N. and Mitchell, J.K., “Failure Mechanisms in Geosynthetically Reinforced Soil Slopes,” Proceedings of the Fourteenth Int. Conf. on Soil Mechanics and Foundation Engineering, Hamburg, Germany, 1997, Vol. 3, pp. 1661-1664.
  • Dietrich, W.E., and Sitar, N.,  “Geoscience and Geotechnical Engineering Aspects of Debris-Flow Hazard Assessment,” Invited Overview Paper, in Debris-Flow Hazards Mitigation: Mechanics, Prediction, and Assessment, C-L. Chen, ed., Proceedings of the First Int. Conf., San Francisco, 1997, ASCE, pp. 656-676.
  • Ashford, S.A., and Sitar, N.,  “Analysis of Topographic Amplification of Inclined Shear Waves in a Steep Coastal Bluff,” Bulletin of the Seismological Society of America, 87(3), 1997, pp. 692-700.
  • Ashford, S.A., Sitar, N., Lysmer, J., and Deng, N.,  “Topographic Effects on the Seismic Response of Steep Slopes,”  Bulletin of the Seismological Society of America, 87(3), 1997, pp. 701-709.
  • Zornberg, J.G., Sitar, N., and Mitchell, J.K.,  “Failure of Steep Reinforced Soil Slopes,” Geosynthetics '97 Conference Proceedings, Long Beach, CA, Industrial Fabrics Association International, publisher, Vol.1, 1997, pp. 55-72.
  • Grubb, D.G. and Sitar, N., “Experimental Evaluation of in-situ displacement of Trichloroethene (TCE) from aquifer media using ethanol.”  Proceedings, Second International Congress on Environmental Geotechnics, Osaka, November 1996, M. Kamon, editor, A.A. Balkema, Rotterdam, Vol. 2, pp. 1005-1009.
  • Anderson, S.A. and Sitar, N., “Analysis of Rainfall-Induced Debris Flows,” Closure, J. of Geotechnical Engineering, ASCE, 122(12), 1996, pp. 1026-1027.
  • Shewbridge, S.E. and Sitar, N., “Formation of Shear Zones in Reinforced Sand,” J. of Geotechnical Engineering, ASCE, 122(11), 1996, pp. 873-885.
  • MacLaughlin, M.M. and Sitar, N., “Kinematics of Sliding on a Hinged Failure Surface,” in Rock Mechanics: Tools and Techniques, Aubertin M., Hasani, F., and Mitri H., eds., Proc. of the 2nd North American Rock Mechanics Symposium: NARMS '96, Balkema, Rotterdam, Vol. 2, June, 1996, pp. 2025-2030.
  • MacLaughlin, M.M., and Sitar, N., “Rigid Body Rotations in DDA," in Discontinous Deformantion Analysis (DDA) and Simulations of Discontinuous Media, Salami M.R. and Banks D., eds., Proc. of the First Int. Forum on DDA and Simulations of Discontinuous Media, TSI Press, Albuquerque, NM, June, 1996, pp. 620-635.
  • Zornberg, J.G., Sitar, N., and Mitchell, J.K., “Design of Geosynthetically Reinforced Embankments Using Decomposed Granite as Backfill Material,” Dept. of Civil and Environmental Engineering, UC Berkeley, Geotechnical Engineering Report No. UCB/GT/95-2, December, 1995, 53 p.
  • Grubb, D.G., and Sitar, N., “Bypassing and Mixing Phenomena During an Ethanol Flood of Tricholoroethelyne (TCE) in Layered Fine and Coarse Sands,” Invited Abstract, Eos, Transactions AGU, Vol. 76, No. 46 Supplement, Nov. 7, 1995, pp. F257.
  • Sitar, N., “Geotechnical Reconnaissance of the Effects of the January 17, 1995, Hyogoken-Nanbu Earthquake, Japan,” Earthquake Engineering Research Center, University of California, News, Vol. 16, No. 4, October, 1995, 2 p.
  • Ashford, S.A., and Sitar, N., “Topographic Amplification in Steep Slopes,” Proc. First Int. Conf. on Earthquake Geotechnical Engrg., K. Ishihara ed., A.A. Balkema, Rotterdam, November, 1995, pp. 1153-1158.
  • MacLaughlin, M.M., and Sitar, N., “Discontinuous Deformation Analysis for the Windows PC Environment,” UC Berkeley Version 1.1, Dept. of Civil and Environmental Engineering, UC Berkeley, Geotechnical Engineering Report No. UCB/GT/95-04, October, 1995, 23 p.
  • Sitar, N. (editor and co-author with 18 members of the geotechnical reconnaissance team), “Geotechnical Reconnaissance of the Effects of the January 17, 1995, Hyogoken-Nanbu Earthquake, Japan,” Earthquake Engineering Research Center, University of California, Report No. 95-01, August 1995, 143 p.
  • Anderson, S.A., and Sitar, N., "Analysis of Rainfall-Induced Debris Flows," J. of Geotechnical Engineering, ASCE, Vol. 121, No. 7, Jul. 1995, pp. 544-552.
  • Stewart, J.P., Chang, S.W., Bray, J.D., Seed, R.B., Sitar, N., Riemer, M.F., "A Report on Geotechnical Aspects of the January 17, 1994, Northridge Earthquake," Seismological Research Letters, Vol. 66, No. 3, May-June 1995, pp.7-19.
  • Udell, K.S., Grubb, D.G., and Sitar, N., "Technologies for in Situ Cleanup of Contaminated Sites," Central European Journal of Public Health, Vol. 3, No.2, May 1995, pp.67-76.
  • Anderson, S.A., and Sitar, N.,  “Shear Strength and Slope Stability in a Shallow Clayey Soil Regolith,” in Geological Society of America, Reviews in Engineering Geology, Volume X, W.C. Haneberg and S.A. Anderson, editors, 1995, pp. 1-11.
  • Zornberg, J.G., Sitar, N., and Mitchell, J.K., “Performance of Geotextile-Reinforced Soil Slopes at Failure:  A Centrifuge Study,” Dept. of Civil Engineering, UC Berkely, Geotechnical Engineering Report No. UCB/GT/95-01, April 1995, 171 p.
  • Ashford, S.A., and Sitar, N., “Analysis of Inclined Shear Waves in Vertical Bluffs,” Proc. Third Int. Conf. on Recent Advances in Geotechnical Earthquake Engineering and Soil Dynamics, April 2-7, 1995, St. Louis, Missouri, Vol. II, pp. 693-697.
  • Grubb, D., and Sitar, N., “Experimental Evaluation of In-Situ Displacement of Trichloroethene (TCE) from Aquifer Media Using Ethanol,” Abstract, EOS, AGU, Vol. 76, No. 17, April 1995/Supplement, p. S131.
  • MacLaughlin, M.M., Sitar, N., and Dobson, T.S., "Slope Stability Evaluation Using Discontinuous Deformation Analysis," Proc. 31st Symp. on Engineering Geology and Geotechnical Engineering, Logan, Utah, March 29-31, 1995, pp. 144-156.
  • Grubb, D., and Sitar, N., "Review of Technologies for In-Situ Cleanup of DNAPLs," Proceedings, Geoenvironment 2000, Acar, Y.B. and Daniel D.E. editors, ASCE, Geotech. Spec. Pub. No. 46, Vol. 2, 1995, 1646-1662.
  • Sitar, N., and Rogers, C.T., "On Scale Dependency of Data for Analysis of Landslide Hazard Using GIS and Expert Systems," in Proceedings of the U.S. - Spain Workshop on Natural Hazards, Barcelona, 8-11 June, 1993, Corominas J. and Georgakakos K.P., editors, October, 1994, pp. 195-208.
  • Grubb, D. and Sitar, N., "Evaluation of Technologies for In-Situ Cleanup of DNAPL Contaminated Sites," U.S. EPA, Office of Research and Development, Report No. EPA/600/R-94/120, August, 1994, 173p.
  • Rogers, T.C. and Sitar, N., "Integrating Expert Opinion and Empirical Data to Evaluate Landslide Hazard," Proc. First Panam. Symp. on Landslides, The Ecuadorian Soc. for Soil and Rock Mech., Guayaquil, Ecuador, August 1994, Vol. I, pp. 264-279.
  • Sitar, N., "Initiation of Rainfall-Induced Debris Flows," Invited Paper, Proc. First Panam. Symp. on Landslides, The Ecuadorian Soc. for Soil and Rock Mech., Guayaquil, Ecuador, August 1994, Vol. I, pp. 23-35.
  • Jang, Y.S., Sitar, N. and Der Kiureghian, A., "Reliability Analysis of Contaminant Transport in Saturated Porous Media," Water Resources Research, AGU, Vol. 30, No. 8, August 1994, pp. 2435-2448.
  • Ashford, S.A. and Sitar, N., "Analysis of Topographic Amplification of Steep Slopes," Proceedings, 5th Nat. Conf. on Earthquake Engrg., Chicago, IL, July 10-14, 1994, pp. 2435-2448.
  • Rau, G.A., Ashford, S.A., Sitar, N. and Zornberg, J.G., "Landslides," in "Geotechnical Aspects of the Northridge Earthquake of January 17, 1994," Geotechnical News, BiTech Publishers, Vancouver, B.C., Vol. 12, No. 2, June, 1994, pp. 56-58.
  • Rau, G.A., Zornberg, J.G. and Sitar, N., "Landslides" in "Preliminary Report on the Principal Geotechnical Aspects of the January 17, 1994 Northridge Earthquake," University of California, Earthquake Engineering Research Center, Report No. UCB/EERC-94/08, June 1994, pp. 147-157.
  • Stewart, J.P., Bray, J.D., Seed, R.B. and Sitar, N., editors, "Preliminary Report on the Principal Geotechnical Aspects of the January 17, 1994 Northridge Earthquake," University of California, Earthquake Engineering Research Center, Report No. UCB/EERC-94/08, June 1994, 238 pp.
  • Ashford, S.A. and Sitar, N., "Seismic Response of Steep Natural Slopes," University of California, Earthquake Engineering Research Center, Report No. UCB/EERC-94/05, May 1994, 199 pp.
  • Mok, C.M., Sitar, N., Der Kiureghian, A., "Numerically Efficient Reliability Analysis of Groundwater Flow and Subsurface Contaminant Transport," in Computer Methods and Advances in Geomechanics, Proc. of the Eighth Int. Conf. on Comp. Meth. and Advances in Geomechanics, edited by Siriwardane and Zaman, Balkema, Rotterdam, May 1994, Vol.2, pp. 1153-1158.
  • Sitar, N. and Salgado, R., "Behavior of the San Francisco Bay Mud from the Marina District in Static and Cyclic Simple Shear," in Loma Prieta Professional Paper 1551-A, U.S. Geological Survey, 1994.
  • Anderson, S.A. and Sitar, N., "Procedures for Analysis of the Mobilization of Debris Flows," Proceedings Thirteenth International Conference on Soil Mechanics and Foundation Engineering, New Delhi, India, January 5-10, 1994. pp. 255-258.
  • Rogers, C.T. and Sitar, N., "Expert Systems Approach to Regional Evaluation of Debris Flow Hazard", Geotechnical Engineering Report No. UCB/GT/93-08, Department of Civil Engineering, University of California, Berkeley, CA, November 1993, 173 pp.
  • Rogers, C.T. and Sitar, N., "Expert Systems Approach to Regional Debris Flow Hazard Evaluation," Abstract, EOS, Transactions, American Geophysical Union, Vol. 74, No. 43 Supplement, Oct. 26, 1993, p. 316.
  • Mok, C. M., Sitar, N. and Der Kiureghian, A., "Bayesian Reliability Analysis of Groundwater Flow and Subsurface Contaminant Transport", Abstract, EOS, Transactions, American Geophysical Union, Vol. 74, No. 43 Supplement, Oct. 26, 1993, p. 251.
  • Rumpelt, T. K. and Sitar, N., "The Mechanical Behaviour of Marine Bioclastic and Siliceous Cemented Sands:  A Comparison Based on Laboratory Investigations", Proceedings, Geotechnical Engineering of Hard Soils - Soft Rocks, Athens, Greece, September 20-23, 1993, pp. 779-786.
  • Yapa, K.A.S., Mitchell, J.K. and Sitar, N., "Decomposed Granite as an Embankment Fill Material: Mechanical Properties and the Influence of Particle Breakage," Geotechnical Engineering Report No. UCB/GT/93-06, Department of Civil Engineering, University of California, Berkeley, CA, June 1993, 250 pp.
  • Sitar, N. and Salgado, R., "Behavior of the San Francisco Bay Mud from the Marina District in Static and Cyclic Simple Shear," Geotechnical Engineering Report No. UCB/GT/93-03, Department of Civil Engineering, University of California, Berkeley, CA, April 1993, 20 pp.
  • Pantazidou, M. and Sitar, N., "Emplacement of Nonaqueous Liquids in the Vadose Zone," Water Resources Research, AGU, Vol. 29, No. 3, March 1993, pp. 705-722.
  • Anderson, S.A. and Sitar, N., "Debris Flow Initiation: The Role of Hydrologic Response and Soil Behavior," Geotechnical Engineering Report No. UCB/GT/93-02, Department of Civil Engineering, University of California, Berkeley, CA, February 1993, 220 pp.
  • Ashford, S.A. and Sitar, N., "Development of Analytical Methods for Evaluation of Seismic Stability of Coastal Bluffs in the San Francisco Bay Region," Geotechnical Engineering Report No. UCB/GT/92-12, Department of Civil Engineering, University of California, Berkeley, CA, December 1992, 63 pp.
  • Sitar, N., Der Kiureghian, A., Mok, C.M. and Jang, Y.S., "Reliability Approach to Probabilistic Modeling of Groundwater Flow and Transport," Invited Abstract, Remson Symposium, AGU 1992 Fall Meeting, EOS, Vol. 73, No. 43, Oct. 27, 1992, Supplement p. 185.
  • Anderson, S.A. and Sitar, N., "The Effect of Infiltration and Changing Pore Pressure on Colluvial Soil," Abstract, AGU 1992 Fall Meeting, EOS, Vol. 73., No. 43, Oct. 27, 1992, Supplement p. 212.
  • Sitar, N., Hunt, J.R. and Geller, J.T., "Practical Aspects of Multiphase Equilibria in Evaluating the Degree of Contamination", Proceedings of the Conference on Subsurface Contamination by Immiscible Fluids, K.U. Weyer ed., Balkema, Rotterdam, 1992, pp. 265-270.
  • Yapa, K.A.S., Mitchell, J.K. and Sitar, N., "Decomposed Granite as an Embankment Fill Material:  Physical and Mechanical Properties - A Review," Geotechnical Engineering Report No. UCB/GT/92-11, Department of Civil Engineering, University of California, Berkeley, CA, October 1992, 119 pp.
  • Shewbridge, S.E. and Sitar, N., "Shear Zone Formation and Slope Stability Analysis," Stability and Performance of Slopes and Embankments II, Proceedings, ASCE Geotech. Div. Specialty Conf. Berkeley, CA, June 26-29,1992, ASCE, Geotech. Spec. Pub. No. 31, Vol. I, pp. 358-370.
  • Sitar, N., Anderson, S.A. and Johnson, K.A., "Conditions for Initiation of Rainfall-Induced Debris Flows," Stability and Performance of Slopes and Embankments II, Proceedings, ASCE Geotech. Div. Specialty Conf. Berkeley, CA, June 26-29,1992, ASCE, Geotech Spec. Pub. No. 31, Vol. I, pp. 834-849.
  • Rogers, C.T. and Sitar, N., "Expert Systems Approach to Regional Assessment of Debris Flow Hazard:  Problem Statement and Knowledge Base Development", CCNAA-AIT Joint Seminar on Prediction & Damage Mitigation of Meteorologically Induced Natural Disasters, National Taiwan University, May 21-24, 1992, pp. 113-123.
  • Pantazidou, M. and Sitar, N., "Nonaqueous Liquids in the Vadose Zone:  Model Experiments and Emplacement Analyses," in Environmental Geotechnology, Proceedings of the Mediterranean Conf. on Env. Geotechnology, Cesme Turkey, 25-27 May, 1992, Balkema Publishers, pp. 49-55.
  • Shewbridge, S.E. and Sitar, N., "Strain Compatibility Design Method for Reinforced Earth Walls," Discussion, J. of Geotech. Engrg., ASCE, Vol. 118, No. 2, 1992, pp. 318-320.
  • Sitar, N., "Earthquake-Induced Landslides in Coastal Bluffs and Marine Terrace Deposits," in Loma Prieta Earthquake:  Engineering Geologic Perspectives, Association of Engrg. Geologists, Special Pub. No.1, 1991, pp.75-82.
  • Baldwin, J.E. and Sitar, N., editors, "Loma Prieta Earthquake:  Engineering Geologic Perspectives," Association of Engrg. Geologists, Special Pub. No. 1, 1991.
  • Shewbridge, S.E. and Sitar, N., "Deformation Characteristics of Reinforced Sand in Direct Shear," Closure, J. of Geotech. Engrg., ASCE, Vol. 117, No.11, 1991, pp. 1812-1817.
  • Sitar, N., "Volcanic Soils," General Report, Proc. 9th Panam. Conf. on Soil Mech. and Found. Engrg., Vina del Mar, Chile, 1991, Vol. IV, pp. 1807-1820.
  • Pantazidou, M. and Sitar, N., "An Experimental Study of the Movement of Nonaqueous Liquids in Partly Saturated Porous Media," Abstract, EOS, Transactions, American Geophysical Union, Vol. 72, No. 17, April 1991, p. 127.
  • Jang, Y.S. and Sitar, N., "CALREL TRANS User's Manual," Geotechnical Engineering Report No. UCB/GT/91 04, Department of Civil Engineering, University of California, Berkeley, CA, June 1991, 27 pp.
  • Pantazidou, M. and Sitar, N., "Migration of Nonaqueous Liquids in the Vadose Zone," Geotechnical Engineering Report No. UCB/GT/91 03, Department of Civil Engineering, University of California, Berkeley, CA, May 1991, 264 pp.
  • Anderson, S.A. and Sitar, N., "Influence of Stress Path on Soil Strength Parameters and Analysis of Rainfall Induced Slope Failures," Proc. 27th Symp. on Eng. Geology and Geot. Engrg., Logan, UT, April 10 12, 1991.
  • Shamsai, A. and Sitar, N., "A Method for Determination of Hydraulic Conductivity in Unsaturated Porous Media," J. of the Irrigation and Drainage Engineering, ASCE, 117(1):  January/February 1991, pp. 64-78.
  • Johnson, K.A. and Sitar, N., "Hydrologic Conditions Leading to Debris Flow Initiation," Canadian Geotechnical Journal, Vol 27, No. 6, December 1990, pp. 789 801.
  • Jang, Y.S. and Sitar, N., "Reliability Analysis of Contaminant Transport Through Clay Liners," Geotechnical Engineering Report No. UCB/GT 90 4, Department of Civil Engineering, University of California, Berkeley, CA, December 1990, 31 pp.
  • Sitar, N., "Landslides," in Putting The Pieces Together, Nat. Conf. on the Loma Prieta Earthquake One Year Later, Published by Bay Area Regional Earthquake Preparedness Project, Oakland, CA,  October 1990, 10 pp.
  • Jang, Y.S., Sitar, N. and Der Kiureghian, A., "Reliability Approach to Probabilistic Modeling of Contaminant Transport," Geotechnical Engineering Report No. UCB/GT 90-3, Department of Civil Engineering, University of California, Berkeley, CA, July 1990, 164 pp.
  • Shewbridge, S.E. and Sitar, N., "Deformation Based Model for Reinforced Sand," Journal of the Geotech. Eng. Division, ASCE, Vol. 116, No. 7, July 1990, pp. 1153 1170.
  • Sitar, N., "Seismic Response of Steep Slopes in Weakly Cemented Sands and Gravels," Proceedings of the H. B. Seed Memorial Symposium, Berkeley, CA, May 1990, Bitech Publishers Ltd., Vancouver, B.C., Vol. 2, 1990, pp. 67 82.
  • Seed, R.B., et. al., "Preliminary Report on the Principal Geotechnical Aspects of the October 17, 1989 Loma Prieta Earthquake," University of California, Earthquake Engineering Research Center, Report No. UCB/EERC 90/05, April 1990.
  • Sitar, N., Jang, Y.S. and Der Kiureghian, A., "Reliability Approach to Probabilistic Modelling of Contaminant Transport in Groundwater," Abstract, EOS, Transactions, American Geophysical Union, Vol. 71, No. 17, April 24, 1990, pp. 518.
  • Mitchell, J.K., Sitar, N. and Seed, R.B., "Waste Geotechnics at the University of California, Berkeley," Geotechnical News, Vol. 7, No. 4, Dec. 1989, pp. 28 30.
  • Johnson, K.A. and Sitar, N., "Antecedent Moisture Conditions and Rainfall Induced Pore Pressure Response in Hillslopes," Invited Abstract, EOS, Transactions, American Geophysical Union, Vol. 70, No. 15, April 11, 1989, pp. 343.
  • Shewbridge, S.E. and Sitar, N., "Deformation Characteristics of Reinforced Sand in Direct Shear," Journal of Geot. Eng. Div., ASCE, Vol. 115, No. 8, August 1989, pp. 1134 1147.
  • Johnson, K.A. and Sitar, N., "Significance of Transient Pore Pressures and Local Slope Conditions in Debris Flow Initiation," Proceedings of the XII Int. Conf. on Soil Mech. and Found. Engg., Rio De Janeiro, Brazil, August 1989, Vol. 3, pp. 1619 1622.
  • Cawlfield, J.D. and Sitar, N., "Stochastic Finite Element Analysis of Groundwater Flow Using the First Order Reliability Method," Invited Paper in Consequences of Spatial Variability in Aquifer Properties and Data Limitations for Groundwater Modelling Practice, IAHS Publication No. 175, 1988, pp. 191 216.
  • Hunt, J.R., Sitar, N. and Udell, K. S., "Nonaqueous Phase Liquid Transport and Cleanup, 2. Experimental Studies," AGU, Water Resources Research, Vol. 24, No. 8, August 1988, pp. 1259 1269.
  • Hunt, J.R., Sitar, N. and Udell, K.S., "Nonaqueous Phase Liquid Transport and Cleanup, 1. Analysis of Mechanisms," AGU, Water Resources Research, Vol. 24, No. 8, August 1988, pp. 1247 1258.
  • Hunt, J.R., Geller, J.T., Sitar, N. and Udell, K.S., "Subsurface Transport Processes for Gasoline Components," Procs. 1988 CSCE ASCE National Conference, Vancouver, B.C., Canada, July 13, 15, 1988, pp. 536 543.
  • Cawlfield, J.D. and Sitar, N., "First Order Reliability Analysis of Groundwater Flow," Procs. of the 5th ASCE Specialty Conference on Probabilistic Methods in Civil Engineering, Blacksburg, Virginia, May 25 27, 1988, pp. 144 147.
  • Sitar, N., editor, "Geotechnical Aspects of Karst Terrains:  Exploration, Foundation Design and Performance, and Remedial Measures," editor, Geotech. Special Publ. No. 14, ASCE, May 1988.
  • Sitar, N. and Johnson, K.A., "Storm Induced Pore Pressures and Debris Flow Initiation," Procs. US ASIA Conf. on Engineering for Mitigating Natural Hazards Damage, Bangkok, Thailand, December 1987, pp. C3 1 C3 11.
  • Johnson, K.A. and Sitar, N., "Debris Flow Initiation:  An Investigation of Mechanisms," Geotechnical Engineering Report No. UCB/GT/87 02, University of California, Berkeley, CA, October 1987.
  • Cawlfield, J.D. and Sitar, N., "First Order Reliability Approach to Stochastic Analysis of Groundwater Flow," Abstract, International Union of Geodesy and Geophysics, XIX General Assembly, August 9 22, 1987, Vancouver, B.C., Canada, Vol. 3, p. 957.
  • Cawlfield, J.D. and Sitar, N., "Application of First Order Reliability to Stochastic Finite Element Analysis of Groundwater Flow," Geotechnical Engineering Report No. UCB/GT/87 01, University of California, Berkeley, CA, June 1987, 191 pp.
  • Sitar, N., Hunt, J.R. and Udell, K.S., "Movement of Nonaqueous Liquids in Groundwater," Invited Paper, Geotechnical Practice for Waste Disposal '87, Procs. Spec. Conf. sponsored by the Geotechnical Engineering Division of ASCE, University of Michigan, Ann Arbor, June l5 17, 1987, Geot. Spec. Publ. No. 13, pp. 205 223.
  • Sitar, N., Cawlfield, J.D. and Der Kiureghian, A., "First Order Reliability Approach to Stochastic Analysis of Subsurface Flow and Contaminant Transport," AGU, Water Resources Research, Vol. 23, No. 5, May 1987, pp. 794 904.
  • Luckman, P.G., Der Kiureghian, A. and Sitar, N., "Use of Stochastic Stability Analysis for Bayesian Back Calculation of Pore Pressures Acting in a Cut Slope at Failure," Proc. 5th Int. Conf. on Applications of Statistics and Probability in Soil and Structural Engineering, Vancouver, B.C., Canada, May 1987.
  • Hunt, J.R., McDowell Boyer, L. and Sitar, N., "Colloid Migration in Porous Media," Proceedings International Symposium on Coupled Processes Associated with Nuclear Waste Repositories, Academic Press, Inc., 1987, pp. 453 472.
  • McDowell Boyer, L.M., Hunt, J.R. and Sitar, N., "Particle Transport in Porous Media," Water Resources Research, Vol. 22, No. 13, December 1986, pp. 1901 1921.
  • Geller, J.F., Hunt, J.R., Sitar, N. and Udell, K.S., "Organic Solvents and Petroleum Hydrocarbons in the Subsurface:  Transport and Cleanup," Abstract, EOS, Transactions, American Geophysical Union, Vol. 67, No. 44, November 1986, p. 948.
  • Hunt, J.R., Sitar, N. and Udell, K.S., "Organic Solvents and Petroleum Hydrocarbons in the Subsurface:  Transport and Cleanup," Sanitary Engineering and Environmental Health Research Laboratory Report No. UCB SEEHRL 86 11, August 29, 1986.
  • Johnson, K.A. and Sitar, N., "Techniques for Identification of Source Areas for Debris Flows," Geotechnical Engineering Report No. UCB/GT/86 01, Department of Civil Engineering, University of California, Berkeley, CA, January 1986, 38 pp.
  • Hunt, J.R., Sitar, N. and Udell, K.S., "Mechanisms Controlling the Movement of Organic Solvents in Aquifers and their Implications for Cleanup," Abstract, EOS, Transactions, American Geophysical Union, Vol. 66, No. 46, November 1985, p. 904.
  • Johnson, K.A. and Sitar, N., "A Field Investigation of the Temporal Relationship between Hillslope Hydrologic Response and Individual Rainfall Events," Abstract, EOS, Transactions, American Geophysical Union, Vol. 66, No. 46, November 1985, p. 898.
  • Sitar, N. and Oliveira, D.P., "Mobility of Organic Solvents in an Aquifer  A Case History and its Implications," Abstract, EOS, Transactions, American Geophysical Union, Vol. 66, No. 46, November 1985, p. 894.
  • McDowell Boyer, L.M., Hunt, J.R. and Sitar, N., "Particle Transport Through Porous Media," Sanitary Engineering and Environmental Health Research Laboratory Report No. UCB SEEHRL 85 12, University of California, Berkeley, CA, Nov. 1985, 71 pp.
  • Sitar, N., "Goals for Basic Research in Engineering Geology," Bulletin of the Association of Engineering Geology, Vol. XXII, No. 4, Nov. 1985, pp. 435 443.
  • Shewbridge, S. and Sitar, N., "The Influence of Fiber Properties on the Deformation Characteristics of Fiber Soil Composites," Geotechnical Engineering Report No. UCB/GT/85 02, University of California, Berkeley, CA, Sept. 1985, 100 pp.
  • Sitar, N., Cawlfield, J.D. and Der Kiureghian, A., "First Order Reliability Approach to Stochastic Analysis of Groundwater Flow and Solute Transport," Geotechnical Engineering Report No. UCB/GT/85 01, University of California, Berkeley, CA, Sept. 1985, 85 pp.
  • Oliveira, D.P. and Sitar, N., "Groundwater Contamination from Underground Solvent Storage Tanks, Santa Clara, California," Proceedings of the Fifth National Symposium on Aquifer Restoration and Groundwater Monitoring, Columbus, Ohio, May 1985.
  • Villet, W.C.B., Sitar, N. and Johnson, K.A., "Simple Shear Tests on Highly Overconsolidated Offshore Silts," Proceedings 17th Offshore Technology Conference, Paper OTC 4918, Houston, Texas, 1985.
  • Elsworth, D., Sitar, N. and Goodman, R.E., "Finite Element Analysis of Laminar/Turbulent Flow in Porous and Fractured Media," Report No. LBL 19105, Lawrence Berkeley Laboratory, Berkeley, CA, Jan. 1985, 33 p.
  • Sitar, N. and Johnson, K.A., "Identification of Potential Source Areas for Debris Flows Using Color, Black and White, and Black and White Infra Red Photography," The Geological Society of America, 97th Annual Meeting, Abstracts with Programs 1984, Vol. 16, No. 6., Sept. 1984, p. 658.
  • Dean, R.G., Armstrong, G.A. and Sitar, N., "California Coastal Erosion and Storm Damage During the Winter of 1982-83," National Academy Press, Washington, D.C., 1984.
  • Sitar, N. and Wang, Y.D., "Cyclic Test Control and Data Acquisition using a Microcomputer," Proceedings 2nd National Conference on Microcomputers in Civil Engineering, Orlando, Florida, Oct. 30 Nov. 1, 1984, pp. 6 8.
  • Sitar, N., "Slope Failures," a topic summary paper in "Debris Flows, Landslides, and Floods in the San Francisco Bay Region, January, 1982," National Academy Press, Washington, D.C., 1984, pp. 68 71.
  • Goodman, R.E., Amadei, B. and Sitar, N., "Uplift Pressure in a Crack Below a Dam," Journal of Energy Engineering, ASCE, Vol. 109, No. 4, December 1983, pp. 207 221.
  • Sitar, N., "Slope Stability in Coarse Sediments" in "Geologic Environment and Soil Properties," R.N. Yong, editor, ASCE Special Publication, 1983, pp. 82 98.
  • Sitar, N., Brekke, T.L. and Jahns, R.H., "Goals for Basic Research in Engineering Geology," Report on a Workshop held in St. Helena, Ca., Jan. 21 22, 1983, Department of Civil Engineering, University of California, Berkeley, CA, Sept. 1983, 24 p. + Supplement.
  • Sitar, N. and Clough, G.W., "Seismic Response of Steep Slopes in Cemented Soils," Journal of the Geotechnical Division of ASCE, Vol. 109, No. 2, Feb. 1983, pp. 210 227.
  • Mitchell, J.K. and Sitar, N., "Engineering Properties of Tropical Residual Soils," Invited Paper, Proceedings ASCE Geotechnical Specialty Conference on Engineering and Construction in Tropical and Residual Soils, Honolulu, Hawaii, January 1982, pp. 30 57.
  • Bachus, R.C., Clough, G.W., Sitar, N., Shafii Rad, N., Crosby, J. and Kaboli, P., "Behavior of Weakly Cemented Soil Slopes under Static and Seismic Loading Conditions," Vol. II, J. A. Blume Earthquake Engineering Center, Report No. 52, Stanford University, July 1981, 247 p.
  • Clough, G.W., Sitar, N., Bachus, R.C. and Shafii Rad, N., "Cemented Sands under Static Loading," Journal of the Geotech. Eng. Div., ASCE, Vol. 107, No. GT6, June 1981, pp. 799 817.
  • Sitar, N., Clough, G.W. and Bachus, R.C., "Behavior of Weakly Cemented Soil Slopes Under Static and Seismic Loading Conditions," Vol. I, J. A. Blume Earthquake Center, Report No. 44, Stanford University, June 1980, 192 p.
  • Sitar, N. and Clough, G.W., "Behavior of Slopes in Weakly Cemented Soils under Seismic Loading," Proc. 2nd U.S. Nat. Conf. on Earthquake Engineering, Stanford, CA, 1979, pp. 1006 1015.
  • Aquado, E., Sitar, N. and Remson, I., "Sensitivity Analysis in Aquifer Studies," Water Resources Research, Vol. 13, No. 4, 1977, pp. 733 737.
  • Hudec, P.P. and Sitar, N., "Effect of Water Sorption on Carbonate Rock Expansivity," Canadian Geotechnical Journal, Vol. 12, No. 2, 1975, pp. 179 186.