Brian R Clark
Brian Clark is the Deputy Program Coordinator for the Water Availability and Use Science Program in the USGS Water Resources Mission Area.
Brian has led water resource investigations of groundwater and surface water computer model simulations in 12 States and six Countries. He recently served as the Geographic Information Specialist at the USGS providing support for database construction, project management planning, and web-application design. He has also served as adjunct faculty at the University of Arkansas at Little Rock as Instructor of Hydrogeology.
Brian has authored or co-authored over a dozen USGS reports and has presented various work at over 19 professional conferences for 13 entities in 11 States with audiences ranging from students and water resource managers to an Army Colonel and Brigadier General.
Brian began his career in water resources at a water well construction company in northwest Arkansas installing submersible pumps and drilling wells for domestic and municipal use. He attended Arkansas Tech University, receiving a Bachelors of Science in Physical Science in 1998. While at Arkansas Tech, his interest in subsurface structure and processes led to a minor in geology where Dr. Steve Kline, Associate Professor of Geology, took the initiative to convince Brian to apply to graduate school.
While at Baylor, Brian served as the both lab instructor and manager of the department drill rig. Opportunities outside the classroom while at Baylor included investigations into the efficiency of municipal water transport for the City of Dallas, a gas pipeline survey on Big Sandy Creek north of Beaumont, and the application of geophysical methods within a salt dome 1,500 feet below land surface. Brian graduated from Baylor with a Masters in Geology in 2000.
Science and Products
Simulation of groundwater flow in the Edwards-Trinity and related aquifers in the Pecos County region, Texas
Simulation of groundwater flow in the Edwards-Trinity and related aquifers in the Pecos County region, Texas
Simulation of the June 11, 2010, flood along the Little Missouri River near Langley, Arkansas, using a hydrologic model coupled to a hydraulic model
Enhancements to the Mississippi Embayment Regional Aquifer Study (MERAS) groundwater-flow model and simulations of sustainable water-level scenarios
A zonal evaluation of intrinsic susceptibility in selected principal aquifers of the United States
Modeling the potential impact of seasonal and inactive multi-aquifer wells on contaminant movement to public water-supply wells
Simulation of the effects of groundwater withdrawals on water-level altitudes in the Sparta aquifer in the Bayou Meto-Grand Prairie area of eastern Arkansas, 2007-37
Groundwater availability of the Mississippi embayment
A new tool to assess groundwater resources in the Mississippi embayment
Simulation of water-use conservation scenarios for the Mississippi Delta using an existing regional groundwater flow model
The Mississippi Embayment Regional Aquifer Study (MERAS): Documentation of a groundwater-flow model constructed to assess water availability in the Mississippi embayment
Geophysical Log Database for the Mississippi Embayment Regional Aquifer Study (MERAS)
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Simulation of groundwater flow in the Edwards-Trinity and related aquifers in the Pecos County region, Texas
The Edwards-Trinity aquifer, a major aquifer in the Pecos County region of western Texas, is a vital groundwater resource for agricultural, industrial, and public supply uses. Resource managers would like to better understand the future availability of water in the Edwards-Trinity aquifer in the Pecos County region and the effects of the possible increase or temporal redistribution of groundwaterAuthorsJonathan V. ThomasSimulation of groundwater flow in the Edwards-Trinity and related aquifers in the Pecos County region, Texas
The Edwards-Trinity aquifer is a vital groundwater resource for agricultural, industrial, and public supply uses in the Pecos County region of western Texas. The U.S. Geological Survey completed a comprehensive, integrated analysis of available hydrogeologic data to develop a numerical groundwater-flow model of the Edwards-Trinity and related aquifers in the study area in parts of Brewster, Jeff DAuthorsBrian R. Clark, Johnathan R. Bumgarner, Natalie A. Houston, Adam L. FosterSimulation of the June 11, 2010, flood along the Little Missouri River near Langley, Arkansas, using a hydrologic model coupled to a hydraulic model
A substantial flood event occurred on June 11, 2010, causing the Little Missouri River to flow over much of the adjacent land area, resulting in catastrophic damages. Twenty fatalities occurred and numerous automobiles, cabins, and recreational vehicles were destroyed within the U.S. Department of Agriculture-Forest Service Albert Pike Recreation Area, at a dispersed campsite area in the surroundiAuthorsDrew A. Westerman, Brian R. ClarkEnhancements to the Mississippi Embayment Regional Aquifer Study (MERAS) groundwater-flow model and simulations of sustainable water-level scenarios
Arkansas continues to be one of the largest users of groundwater in the Nation. As such, long-term planning and management are essential to ensure continued availability of groundwater and surface water for years to come. The Mississippi Embayment Regional Aquifer Study (MERAS) model was developed previously as a tool to evaluate groundwater availability within the Mississippi embayment, which encAuthorsBrian R. Clark, Drew A. Westerman, D. Todd FugittA zonal evaluation of intrinsic susceptibility in selected principal aquifers of the United States
A method was developed to evaluate intrinsic groundwater susceptibility in 11 study areas across the United States. Calibrated groundwater-flow models and a variable-advection particle-tracking scheme that accounts for uncertainty were used to derive ranges of conservative solute concentration and groundwater age within spatially defined zones from solute loading to the water table. Aquifers wereAuthorsTristan P. Wellman, Leon Kauffman, Brian ClarkModeling the potential impact of seasonal and inactive multi-aquifer wells on contaminant movement to public water-supply wells
Wells screened across multiple aquifers can provide pathways for the movement of surprisingly large volumes of groundwater to confined aquifers used for public water supply (PWS). Using a simple numerical model, we examine the impact of several pumping scenarios on leakage from an unconfined aquifer to a confined aquifer and conclude that a single inactive multi-aquifer well can contribute nearlyAuthorsR.L. Johnson, B.R. Clark, M.K. Landon, L. J. Kauffman, S. M. EbertsSimulation of the effects of groundwater withdrawals on water-level altitudes in the Sparta aquifer in the Bayou Meto-Grand Prairie area of eastern Arkansas, 2007-37
A groundwater-flow model of the Mississippi embayment was used to evaluate changes in water-level altitudes before (scenario 1) and after (scenario 2) the addition of wells that simulate potential future pumping from the Sparta aquifer in the Bayou Meto-Grand Prairie area of eastern Arkansas for the 30-year period from 2007 through 2037. Water-level altitudes at six model cell locations from the tAuthorsBrian R. Clark, Drew A. Westerman, D. Todd FugittGroundwater availability of the Mississippi embayment
Groundwater is an important resource for agricultural and municipal uses in the Mississippi embayment. Arkansas ranks first in the Nation for rice and third for cotton production, with both crops dependent on groundwater as a major source of irrigation requirements. Multiple municipalities rely on the groundwater resources to provide water for industrial and public use, which includes the city ofAuthorsBrian R. Clark, Rheannon M. Hart, Jason J. GurdakA new tool to assess groundwater resources in the Mississippi embayment
What is the Mississippi Embayment? The Mississippi embayment study area encompasses approximately 78,000 square miles in eight States and includes large parts of Arkansas, Louisiana, Mississippi, and Tennessee, and smaller areas of Alabama, Illinois, Kentucky, and Missouri (fig. 1). The Mississippi embayment is essentially a basin that slopes toward the Gulf of Mexico and is filled with sedimentsAuthorsBrian R. Clark, David A. FreiwaldSimulation of water-use conservation scenarios for the Mississippi Delta using an existing regional groundwater flow model
The Mississippi River alluvial plain in northwestern Mississippi (referred to as the Delta), once a floodplain to the Mississippi River covered with hardwoods and marshland, is now a highly productive agricultural region of large economic importance to Mississippi. Water for irrigation is supplied primarily by the Mississippi River Valley alluvial aquifer, and although the alluvial aquifer has a lAuthorsJeannie R.B. Barlow, Brian R. ClarkThe Mississippi Embayment Regional Aquifer Study (MERAS): Documentation of a groundwater-flow model constructed to assess water availability in the Mississippi embayment
The Mississippi Embayment Regional Aquifer Study (MERAS) was conducted with support from the Groundwater Resources Program of the U.S. Geological Survey Office of Groundwater. This report documents the construction and calibration of a finite-difference groundwater model for use as a tool to quantify groundwater availability within the Mississippi embayment. To approximate the differential equatioAuthorsBrian R. Clark, Rheannon M. HartGeophysical Log Database for the Mississippi Embayment Regional Aquifer Study (MERAS)
The Mississippi Embayment Regional Aquifer Study (MERAS) is an investigation of ground-water availability and sustainability within the Mississippi embayment as part of the U.S. Geological Survey Ground-Water Resources Program. The MERAS area consists of approximately 70,000 square miles and encompasses parts of eight states including Alabama, Arkansas, Illinois, Kentucky, Louisiana, Mississippi,AuthorsRheannon M. Hart, Brian R. Clark - Science
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