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Hedeff Essaid

Research Hydrologist

Contact Info


Short Biography

My research has focused on subsurface flow and contaminant transport problems that require integration of field information with quantitative analyses to gain a conceptual understanding of system behavior. This work has involved the development and use of models to understand and quantify the processes and factors that control the magnitude and timing of environmental responses to contaminant loading and changing hydrology. I have used this approach to study: saltwater intrusion in layered coastal aquifer systems; the impact of heterogeneity and hysteresis on the distribution of crude oil at a spill site; the role of dissolution and biodegradation on the fate of hydrocarbon components in the subsurface; the impact of surface water-ground water interactions on stream flow, temperature, and water quality; and the hydrology of natural and incised mountain meadows.



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Publications

Constantz, J., C. A. Eddy-Miller, J. D. Wheeler, and H. I. Essaid, 2013, Streambed exchanges along tributary streams in humid watersheds, Water Resour. Res., 49, doi:10.1002/wrcr.20194.

Healy, R.W., and Essaid, H.I., 2012, VS2DI: Model use, Calibration, and Validation: Transactions of the American Society of Agricultural and Biological Engineers, vol. 55(3), 1249-1260.

Essaid, H.I., Bekins, B.A., Herkelrath, W.N., and Delin, G.N., 2011, Crude Oil at the Bemidji Site: 25 Years of Monitoring, Modeling and Understanding: Ground Water, v. 49, no. 5, p. 706-726. [Link]

Rowe, Gary L., Jr.; Belitz, Kenneth; Essaid, Hedeff I.; Gilliom, Robert J.; Hamilton, Pixie A.; Hoos, Anne B.; Lynch, Dennis D.; Munn, Mark D.; Wolock, David W., 2010. Design of Cycle 3 of the National Water-Quality Assessment Program, 2013-2022: Part 1: Framework of Water-Quality Issues and Potential Approaches . U.S. Geological Survey Open-File Report 2009-1296, v, 54 p. [Link]

Cozzarelli, I.M., Bekins, B.A., Eganhouse, R.P., Warren, E., and Essaid, H.I., 2010, In situ measurements of volatile aromatic hydrocarbon biodegradation rates in groundwater: Journal of Contaminant Hydrology, vol. 111, p. 48–64, doi:10.1016/j.jconhyd.2009.12.001. [Link]

Risley, J.C., Constantz, J., Essaid, H., and Rounds, S., 2010, Effects of upstream dams versus groundwater pumping on stream temperature under varying climate conditions: : Water Resources Research, v. 46, W06517, doi:10.1029/2009WR008587 [Link]

Eddy-Miller, Cheryl A.; Wheeler, Jerrod D.; Essaid, Hedeff I., 2009. Characterization of Interactions between Surface Water and Near-Stream Groundwater along Fish Creek, Teton County, Wyoming, by Using Heat as a Tracer. U.S. Geological Survey Scientific Investigations Report 2009-5160, vi, 54 p. [Link]

Kuwabara, J.S., Topping, B.R., Lynch, D.D., Carter, J.L., and Essaid, H.I., 2009, Benthic nutrient sources to hypereutrophic Upper Klamath Lake, Oregon: Environmental Toxicology and Chemistry, v. 28, p. 516-524. [Link]

Essaid, H.I., Zamora, C., McCarthy, K., Vogel, J., and Wilson, J.T., 2008, Using heat to characterize streambed water flux variability in four stream reaches: Journal of Environmental Quality, v. 37, p. 1010-1023. [Link]

Puckett, L.J., Zamora, C., Essaid, H.I., Wilson, J.T., Johnson, H.M., Brayton, M.J., and Vogel, J.R., 2008, Transport and fate of nitrate at the ground water-surface water interface: Journal of Environmental Quality, v. 37, p. 1034-1050. [Link]

Constantz, J. and Essaid, H., 2007, Influence of groundwater pumping on streamflow restoration following upstream dam removal: Hydrological Processes, v. 21, no. 21, p. 2823-2834. [Link]

Essaid, H.I., Wilson, J.T., and Baker, N.T., 2006, Spatial and temporal variability in streambed fluxes, Leary Weber Ditch, IN: Conference Proceedings of the 3rd Federal Interagency Hydrologic Modeling Conference, April, 2006, Reno, Nevada, 8 p

Bekins, B.A., Hostettler, F.D., Herkelrath, W.N., Delin, G.N., Warren, E., and Essaid, H.I., 2005, Progression of methanogenic degradation of crude oil in the subsurface: Environmental Geosciences, v. 12, p. 139-152. [Link]

Essaid, H.I., Cozzarelli, I. M., Eganhouse, R.P., Herkelrath, W.N., Bekins, B.A., and Delin, G.N., 2003, Inverse modeling of BTEX dissolution and biodegradation at the Bemidji, MN crude-oil spill site, Journal of Contaminant Hydrology, v. 67, p.269-299.

Dillard, L.A., Essaid, H.I., and Blunt, M.J., 2001, A functional relation for field-scale nonaqueous phase liquid dissolution developed using a pore network model: Journal of Contaminant Hydrology, 48, 89-119.

Bekins, B.A., Cozzarelli, I.M., Godsy, E.M., Warren, E., Essaid, H.I., and Tuccillo, M.E., 2001, Progression of natural attenuation processes at a crude oil spill site: II. Controls on spatial distribution of microbial populations: Journal of Contaminant Hydrology, v. 53, p. 387-406, 2001.

Essaid, H.I., 1999, USGS SHARP Model, in Bear, J., Cheng, A.H.-D., Sorek, S., Ouazar, D., and Herrera I., eds, Seawater Intrusion in Coastal Aquifers – Concepts, Methods and Practices, Kluwer Academic Publishers, The Netherlands, p. 213-247.

Bekins, B.A., Baehr, A.L., Cozzarelli, I.M., Essaid, H.I., Haack, S.K., Harvey, R.W., Shapiro, A.M., Smith, J.A., and Smith. R.L., 1999, Capabilities and challenges of natural attenuation in the subsurface: Lessons from the U.S. Geological Survey Toxics Substances Hydrology Program, in Morganwalp, D.W. and Buxton, H.T., eds, U.S. Geological Survey Toxic Substances Hydrologiy Program, Proceedings of the Technical Meeting, Charleston, South Carolina, March 8-12, 1999: U.S. Geological Survey Water-Resources Investigations Report 99-4018C, v. 3, p. 37-56.

Bekins, B.A., Cozzarelli, I.M., Godsy, E.M., Warren, E., Tuccillo, M.E., Essaid, H.I., and Paganelli, V.V., 1999, Chemical and physical controls on microbial populations in the Bemidji Toxics Site crude-oil plume, in Morganwalp, D.W. and Buxton, H.T., eds, U.S. Geological Survey Toxic Substances Hydrologiy Program, Proceedings of the Technical Meeting, Charleston, South Carolina, March 8-12, 1999: U.S. Geological Survey Water-Resources Investigations Report 99-4018C, v. 3, p. 133-142.

Delin, G. N.; Essaid, H. I.; Cozzarelli, I. M.; Lahvis, M. H.; Bekins, B. A. , 1998. Ground Water Contamination by Crude Oil near Bemidji, Minnesota. U.S. Geological Survey Fact Sheet 084-98, 4 p.

Essaid, Hedeff I.; Bekins, Barbara A., 1998. Modeling solute-transport and biodegradation with BIOMOC. U.S. Dept. of the Interior, U.S. Geological Survey ; Branch of Information Services [distributor], Fact Sheet 095-98, 1 folded sheet ([4]) : ill. ; 28 cm. ill. [Link]

Essaid, Hedeff I.; Bekins, Barbara A., 1997. BIOMOC, a multispecies solute-transport model with biodegradation. U.S. Dept. of the Interior, U.S. Geological Survey ; Information Services [distributor], Water-Resources Investigations Report 97-4022, viii, 68 p. :ill. ;28 cm.

Dillard, L.A., Essaid, H.I., and Herkelrath, W.N., 1997, Multiphase flow modeling of a crude-oil spill site using a bimodal permeability distribution: Water Resources Research, v. 33, no. 7, p. 1617-1632.

Essaid, H.I., Baedecker, M.J., and Cozzarelli, I.M., 1996, Use of simulation to study field-scale solute transport and biodegradation at the Bemidji, Minnesota, crude-oil spill site, in Morganwalp, D.W. and D.A. Aronson (editors), U.S. Geological Survey Toxic Substances Hydrology Program--Proceedings of the Technical Meeting, Colorado Springs, Colorado, September 20-24, 1993: U.S. Geological Survey Water-Resources Investigations Report 94- 4015, v. 2, p. 621-630.

Dillard, L.A., Essaid, H.I., and Herkelrath, W.N., 1996, Multiphase flow modelling at the Bemidji, Minnesota, crude-oil spill site using geostatistical simulation of soil hydraulic properties, in Morganwalp, D.W. and D.A. Aronson (editors), U.S. Geological Survey Toxic Substances Hydrology Program--Proceedings of the Technical Meeting, Colorado Springs, Colorado, September 20-24, 1993: U.S. Geological Survey Water-Resources Investigations Report 94-4015, v. 2, p. 679- 687.

Essaid, H.I., Bekins, B.A., Godsy, E.M., Warren, E., Baedecker, M.J., and Cozzarelli, I.M., 1995, Simulation of aerobic and anaerobic biodegradation processes at a crude-oil spill site: Water Resources Research, v. 31, no. 12, p. 3309-3327.

Essaid, H.I., 1995, Using Numerical Simulation to Study Field-Scale Flow, Transport, and Biodegradation Processes at the Bemidji, Minnesota, Crude-Oil Spill Site, in K.L. Sublette (editor), Environmental Issues and Solutions in Petroleum Exploration, Production, and Refining, Proceedings of the Second International Petroleum Environmental Conference, Sept. 25 - 27, 1995, New Orleans, LA: National Technical Information Service, U.S. Department of Commerce, Springfield, VA, p. 347-366.

Essaid, H.I., Herkelrath, W.N., and Dillard, L.A., 1994, Field and modeling studies of multiphase fluid flow at the Bemidji, Minnesota crude-oil spill site, in Dutton, Alan R. (editor), Toxic Substances and the Hydrologic Sciences: American Institute of Hydrology, Minneapolis, MN, p. 52-68.

Herkelrath, W.N., Essaid, H.I., and Dillard, L.A., 1994, Multiphase fluid distributions in a shallow water-table aquifer contaminated by crude oil, in Dracos, TH., and Stauffer, F. (editors), Transport and Reactive Processes in Aquifers, Proceedings of the IAHR/AIRH Symposium, Zurich, Switzerland, April 11-15, 1994: Rotterdam, Netherlands, A.A. Balkema, p. 537-542.

Essaid, H.I., 1994, Simulation of flow and transport processes at the Bemidji, Minnesota, crude- oil spill site: Proceedings of the EPA-USGS sponsored Symposium on Intrinsic Bioremediation of Ground Water, Denver, Colorado, Aug. 30 - Sept. 1, 1994, p. 121-134.

Essaid, H.I., and Hess, K.M., 1993, Monte Carlo simulations of multiphase flow incorporating spatial variability of hydraulic properties: Ground Water, v. 31, no. 1, p. 123-134.

Essaid, H.I., Herkelrath, W.N., Hess, K.M., 1993, Simulation of fluid distributions observed at a crude-oil spill site incorporating hysteresis, oil entrapment, and spatial variability of hydraulic properties: Water Resources Research, v. 29, no. 6, p. 1753-1770.

Scholl, M.A., Ingebritsen, S.E., and Essaid, H.I., 1993, Comment on "Consequences of phase separation on the distribution of hydrothermal fluids at ASHES vent field, Axial Volcano, Juan de Fuca Ridge" by Christopher G. Fox: Journal of Geophysical Research, v. 98, no. B2, p. 1813-1815.

Mallard, G.E., Baedecker, M.J., Essaid, H.I., and Eganhouse, R.P., 1993, Hydrocarbon transport and degradation in ground water: Geotimes, v. 38, no. 12, p. 18-20.

Essaid, H. I., 1992. Simulation of freshwater and saltwater flow in the coastal aquifer system of the Purisima Formation in the Soquel-Aptos Basin, Santa Cruz County, California. U.S. Geological Survey ; Books and Open-File Reports Section [distributor], Water-Resources Investigations Report 91-4148, v, 35 p. :ill. ;28 cm.

Hess, K. M., Herkelrath, W. N., and Essaid, H. I., 1992, Determination of subsurface fluid contents at a crude-oil spill site: Journal of Contaminant Hydrology, v. 10, p.75-96.

Essaid, H.I., 1992, Long term issues in ground water management: Seawater intrusion, in Changing practices in ground water management - the pros and cons of regulations, Eighteenth Biennial Conference on Ground Water, Sacramento, CA, Sept. 16-17, 1991: University of California, Water Resources Center, Report No. 77, p. 75-91.

Herkelrath, W.N., Essaid, H.I., and Hess, K.M., 1991, Field and modeling studies of immiscible fluid flow above a contaminated water-table aquifer: Proceedings of the International Hydrology and Water Resources Symposium 1991, Challenges for Sustainable Development, Perth, Australia, 2-4 Oct. 1991, p. 424-428.

Essaid, H. I., Herkelrath, W. N., and Hess, K. M., 1991, Air, Oil, and Water Distributions at a Crude-Oil Spill Site, Bemidji, Minnesota, in G.E. Mallard and D.A. Aronson (editors), U.S. Geological Survey Toxic Substances Hydrology Program Meeting: U.S. Geological Survey Water- Resources Investigations Report 91-4034, p. 614-620.

Essaid, H. I., 1990. The computer model SHARP, a quasi-three-dimensional finite-difference model to simulate freshwater and saltwater flow in layered coastal aquifer systems. U.S. Geological Survey ; Books and Open-File Reports Section [distributor], Water-Resources Investigations Report 90-4130, xi, 181 p. :ill. ;28 cm.

Essaid, H. I., 1990, A multilayered sharp interface model of coupled freshwater and saltwater flow in coastal systems: Model development and application: Water Resources Research, v. 26, no. 7. p. 1431-1454.

Essaid, H. I., 1986, A comparison of the coupled fresh water-salt water flow and the Ghyben- Herzberg sharp interface approaches to modeling of transient behavior in coastal aquifer systems: Journal of Hydrology, v. 86, p. 169-193.

Al-Ansari, N. A., Essaid, H. I., and Salim, Y. N., 1981, Water resources in Iraq: Journal of the Geological Society of Iraq, v. 14, no. 1, p. 34-42.






                           

My Science Topics


Science Topic
Subtopic
Hydrologic Processesground-water flow
Hydrologic Processesground-water level
Hydrologic Processeshydrodynamics
Hydrologic Processeshydrology
Hydrologic Processespercolation
Hydrologic Processesrunoff
Hydrologic Processessaltwater intrusion
Hydrologic Processesstreamflow
Hydrologic Processeswater cycle
Environmental Issuescontamination and pollution
Environmental Issuesground-water quality
Environmental Issuesnonpoint-source pollution
Environmental Issueswater quality
Ecology and Environmentwetlands



My USGS Science Strategy Areas

A Water Census of the United States

Climate Variability & Change

Understanding Ecosystems & Predicting Ecosystems Change

Hydrology of Natural and Incised Mountain Meadows

Image of Current Focus for Hydrology of Natural and Incised Mountain Meadows

 Development and land use practices have caused channel incision and streambed lowering in many mountain meadows. This has resulted in lowering of groundwater tables and changes in the magnitude and timing of watershed and meadow fluxes. The surface water and groundwater hydrology of mountain meadows under natural and incised conditions has been investigated using numerical simulation. The model results illustrate the interdependence between bedrock and meadow hydrology, and between surface and groundwater flow through the meadow. Meadows are not isolated hydrologic systems and should be studied within the context of the encompassing watershed to fully understand their surface water and groundwater hydrodynamics.

 

Contact Information

Hedeff Essaid
Bldg 15, McKelvey Building, 345 Middlefield Road
Menlo Park, CA 94025-3561
hiessaid@usgs.gov
650-329-4581
650-329-4327 - Fax
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