Simulation of Groundwater Flow and Chloride Transport in the “2,000-foot” Sand of the Baton Rouge Area, Louisiana, with Scenarios to Mitigate Saltwater Migration

Charles E. Heywood, 2131 Pleasant Hills Ct., Ridgeway, Colo. 81432, cheywood@usgs.gov; John K. Lovelace, 3535 S. Sherwood Forest Blvd., Suite 120, Baton Rouge, La. 70816, jlovelac@usgs.gov Groundwater withdrawals have caused saltwater to encroach into freshwater-bearing aquifers beneath Baton Rouge, Louisiana. Groundwater investigations in the 1960s identified a freshwater-saltwater interface located …

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Hydraulic Conductivity and Compressibility of Organic Clays in New Orleans

Navid H. Jafari, Civil and Environmental Engineering, Louisiana State University, Baton Rouge, LA, 70803, njafari@lsu.edu Evaluating the field-scale hydraulic conductivity and compressibility of soft organic clays that dominate fluvial-deltaic deposits is important for determining migration of contaminants and magnitude of subsidence. For example, the large concentration of chemical industry and …

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Developing a Groundwater Regulatory Plan to Address Land Subsidence along the Texas Gulf Coast – The Harris-Galveston Subsidence District’s Approach to Mitigating the Problem

Bill Thaman, Freese and Nichols, Inc.10431 Morado Circle, Bldg 5, Ste 300, Austin, Texas 78759 wjt@freese.com; and Michael Turco, General Manager, Harris-Galveston Subsidence District, 1660 West Bay Area Boulevard, Friendswood, Texas 77546, mturco@subsidence.org Significant historical land subsidence, 6-10 feet in some areas, and about 13 feet in the Houston Ship …

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Subsidence Induced Collapse of the Mississippi Delta System

Sherwood M. Gagliano, Ph.D., 1260 Main Street, Baton Rouge, LA 70802: sgagliano@coastalenv.com, Karen M. Wicker, Ph.D., 1260 Main Street, Baton Rouge, LA 70802: kwicker@coastalenv.com The Mississippi River drives one of the largest and most biologically productive ecosystems of North America. The delta ecosystem is an important platform for human activity. …

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Methods for Identification of Potential Future Threats to Louisiana’s Groundwater Supplies

Pierre Sargent, U.S. Geological Survey, Lower Mississippi-Gulf Water Science Center, Baton Rouge Office, Suite 120, 3535 S. Sherwood Forest Blvd., Baton Rouge, LA, 70816: psargent@usgs.gov and Angela L. Collier, U.S. Geological Survey, Lower Mississippi-Gulf Water Science Center, Baton Rouge Office, Suite 120, 3535 S. Sherwood Forest Blvd., Baton Rouge, LA …

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Regional Water Resources: Adaptive Approaches to Policy and Management Of Groundwater, Surface Water and Response to Flood/Drought Cycles

Gary M. Hanson, Hydrologist in Residence, Director, Red River Watershed Management Institute, Louisiana State University Shreveport, One University Place, Shreveport, LA, 71115, hansongm@att.net As humans we have learned to control, to a degree, and make beneficial use of water in the built environment. In doing so, we have stressed natural …

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