Groundwater Flow and Chemical Transport in Fractured Rock and Karst Aquifers
Groundwater Vulnerability of Shallow Fractured Rock Aquifers
Dr. Allen Shapiro is a Senior Research Hydrologist with the U.S. Geological Survey. He is a member of the Water Cycle Branch of the Earth System Processes Division in the Water Mission Area. Dr. Shapiro conducts research on groundwater flow and chemical transport in complex geologic environments, including fractured rock and karst aquifers. Dr. Shapiro’s research has focused on the development of field techniques and equipment, and coupled interpretations of geologic, geophysical, hydraulic, and geochemical information to characterize groundwater flow and chemical transport. Dr. Shapiro has described fundamental processes that are unique to fractured rock aquifers, including the effects of chemical diffusion between mobile water in fractures and immobile water in the intrinsic rock porosity. He has also investigated the effect of scale on the hydraulic and transport properties of fractured rock through carefully designed in situ testing and modeling investigations conducted over dimensions of meters to kilometers. Dr. Shapiro has been active in the characterization and remediation of contaminants in fractured rock, including contamination by Dense Non-Aqueous Phase Liquids. Dr. Shapiro’s recent research focuses on the intermittent vulnerability of shallow fractured rock aquifers to contamination from pathogens or surface contaminants stemming from rapid infiltration following precipitation events.
Dr. Shapiro is a graduate of Princeton University with a Ph.D. in Civil and Geological Engineering. Prior to joining the USGS, Dr. Shapiro conducted hydrologic research at the Royal Institute of Technology (Stockholm, Sweden) and Technion-Israel Institute of Technology (Haifa, Israel). Dr. Shapiro has patented equipment for conducting hydraulic tests and collecting groundwater samples for geochemical analyses in fractured rock aquifers, and he has published numerous articles in peer-reviewed journals. Dr. Shapiro has served as an Associate Editor of Journal of Hydrology and the journal Groundwater. Dr. Shapiro is a Fellow of the Geological Society of America and was selected by the National Ground Water Association (NGWA) as the Distinguished Darcy Lecturer, for which he lectured on his research, both nationally and internationally. Dr. Shapiro has also served on National Research Council and National Academy of Science panels that have produced extensive reports on key engineering and scientific issues facing the Nation.
Science and Products
Science and Products
Non-USGS Publications**Pinder, G. F. and Shapiro, A. 1982. Physics of Flow in Geothermal Systems, in Recent Trends in Hydrogeology. ed. T. N. Narasimhan. Geological Society of America, Boulder, CO. p. 25-30. https://doi.org/10.1130/SPE189-p25.Pinder, G. F. and Shapiro, A. 1979. A new collocation method for the solution of the convection-dominated transport equation. Water Resources Research 15(5): 1177-1182. https://doi.org/10.1029/WR015i005p01177.Pinder, G. F. and Shapiro, A. 1980. Reply to comment on "A new collocation method for the solution of the convection-dominated transport equation". Water Resources Research 16(6): 1137. https://doi.org/10.1029/WR016i006p01137.Shapiro, A. and Pinder, G. F. 1981. Analysis of an upstream weighted collocation approximation to the transport equation. Journal of Computational Physics 39(1): 46-71. https://doi.org/10.1016/0021-9991(81)90136-4.Andersson, J. and Shapiro, A. M. 1983. Stochastic analysis of one-dimensional steady state unsaturated flow: A Comparison of Monte Carlo and Perturbation Methods. Water Resources Research 19(1): 121-133. 10.1029/WR019i001p00121.Shapiro, A. M. and Andersson, J. 1983. Steady state fluid response in fractured rock: A boundary element solution for a coupled, discrete fracture continuum model. Water Resources Research 19(4): 959-969. 10.1029/WR019i004p00959.Andersson, J., Shapiro, A. M. and Bear, J. 1984. A Stochastic Model of a Fractured Rock Conditioned by Measured Information. Water Resources Research 20(1): 79-88. 10.1029/WR020i001p00079.Bear, J. and Shapiro, A. M. 1984. On the shape of the non-steady interface intersecting discontinuities in permeability. Advances in Water Resources 7(3): 106-112. https://doi.org/10.1016/0309-1708(84)90037-X.Bear, J., Shamir, U., Gamliel, A. and Shapiro, A. M. 1985. Motion of the seawater interface in a coastal aquifer by the method of successive steady states. Journal of Hydrology 76(1): 119-132. https://doi.org/10.1016/0022-1694(85)90093-9.
**Disclaimer: The views expressed in Non-USGS publications are those of the author and do not represent the views of the USGS, Department of the Interior, or the U.S. Government.