Item talk:Q45979

ORCID:

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     name: Simulation of groundwater-flow dynamics in the U.S. Northern High Plains
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     name: "Evaluating the impact of irrigation on surface water \u2013 groundwater\
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     name: Characterization of Interactions between Surface Water and Near-Stream
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     name: Modeling solute-transport and biodegradation with BIOMOC
 '@type': Person
 familyName: Essaid
 givenName: Hedeff
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USGS Staff Profile:

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 '@type': Person
 affiliation: []
 description:
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   abstract: Research Hydrologist with the Water Resources Mission Area
   additionalType: short description
 - '@type': TextObject
   abstract: Hedeff Essaid is a Research Hydrologist with the USGS Water Resources
     Mission Area.
   additionalType: staff profile page introductory statement
 - '@type': TextObject
   abstract: 'My research has involved the analysis of field data and simulation
     of groundwater systems and watersheds to characterize water and chemical mass
     balances and to study the relative importance of different hydrologic processes
     and flow pathways.  The results of these studies provide an opportunity to compare
     and contrast groundwater transport, surface water-groundwater interactions and
     chemical fate in different hydrologic/environmental settings. This work has
     improved our understanding and quantification of 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; the hydrology of natural and incised mountain meadows; and
     nutrient fate in diverse watersheds.EDUCATION:Stanford University, Ph.D., 1987,
     HydrogeologyStanford University, M.S., 1984, HydrogeologyUniversity of Baghdad,
     Iraq, B.S., 1978, Geology-Geophysics'
   additionalType: personal statement
 email: hiessaid@usgs.gov
 hasCredential: []
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     '@type': Organization
     name: Water Resources Mission Area
     url: https://www.usgs.gov/mission-areas/water-resources
   roleName: Research Hydrologist
   startDate: '2024-05-12T15:43:41.874002'
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   value: 0000-0003-0154-8628
 jobTitle: Research Hydrologist
 knowsAbout:
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   additionalType: self-claimed expertise
   name: groundwater flow
 - '@type': Thing
   additionalType: self-claimed expertise
   name: groundwater level
 - '@type': Thing
   additionalType: self-claimed expertise
   name: hydrodynamics
 - '@type': Thing
   additionalType: self-claimed expertise
   name: hydrology
 - '@type': Thing
   additionalType: self-claimed expertise
   name: percolation
 - '@type': Thing
   additionalType: self-claimed expertise
   name: runoff
 - '@type': Thing
   additionalType: self-claimed expertise
   name: saltwater intrusion
 - '@type': Thing
   additionalType: self-claimed expertise
   name: streamflow
 - '@type': Thing
   additionalType: self-claimed expertise
   name: water cycle
 - '@type': Thing
   additionalType: self-claimed expertise
   name: contamination and pollution
 - '@type': Thing
   additionalType: self-claimed expertise
   name: groundwater quality
 - '@type': Thing
   additionalType: self-claimed expertise
   name: nonpoint-source pollution
 - '@type': Thing
   additionalType: self-claimed expertise
   name: water quality
 - '@type': Thing
   additionalType: self-claimed expertise
   name: wetland ecosystems
 memberOf:
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   member:
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     name: U.S. Geological Survey
   name: staff member
   startDate: '2024-05-12T15:43:41.871352'
 name: Hedeff I Essaid, Ph.D.
 url: https://www.usgs.gov/staff-profiles/hedeff-i-essaid