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原文传递 Simulation of Groundwater Flow in the '1,500-Foot' Sand and '2,000-Foot' Sand and Movement of Saltwater in the '2,000-Foot' Sand of the Baton Rouge Area, Louisiana.

题名：	Simulation of Groundwater Flow in the '1,500-Foot' Sand and '2,000-Foot' Sand and Movement of Saltwater in the '2,000-Foot' Sand of the Baton Rouge Area, Louisiana.
作者：	Griffit, J. M.; Heywood, C. E.
关键词：	Aquifers; Baton Rouge(louisiana); Evaluation; Figures(data); Flood Flow; Geophysical Surveys; Ground Water; Hydrogeology; Irrigation; Louisiana; Saltwater; Simulation; Tables(data); Water Demand; Wate
摘要：	Groundwater withdrawals have caused saltwater to encroach into freshwater-bearing aquifers beneath Baton Rouge, Louisiana. Groundwater investigations in the 1960s identified a freshwatersaltwater interface located at the Baton Rouge Fault, across which abrupt changes in water levels occur. Aquifers south of the fault generally contain saltwater, and aquifers north of the fault contain freshwater, though limited saltwater encroachment has been detected within 7 of the 10 aquifers north of the fault. The 10 aquifers beneath the Baton Rouge area, which includes East and West Baton Rouge Parishes, Pointe Coupee Parish, and East and West Feliciana Parishes, provided about 167 million gallons per day (Mgal/day) for public supply and industrial use in 2010. Groundwater withdrawals from an aquifer that is 2,000-feet (ft) deep in East Baton Rouge Parish (the 2,000-foot sand of the Baton Rouge area) have caused water-level drawdown up to 356 ft and induced saltwater movement northward across the fault. Groundwater withdrawals from the 2,000-foot sand averaged 23.9 Mgal/d during 2010. Saltwater encroachment threatens wells that are located about 3 miles north of the fault, where industrial withdrawals account for about 66 percent of the water withdrawn from the 2,000-foot sand in East Baton Rouge Parish. Constant and variable-density groundwater models were developed with the MODFLOW and SEAWAT groundwater modeling codes to evaluate strategies to control saltwater migration, including changes in the distribution of groundwater withdrawals and installation of scavenger wells to intercept saltwater before it reaches existing production wells. Five hypothetical scenarios simulated the effects of different groundwater withdrawal options on groundwater levels within the 1,500-foot sand and the 2,000-foot sand and the transport of saltwater within the 2,000-foot sand. Scenario 1 is considered a base case for comparison to the other four scenarios and simulates continuation of 2007 r
报告类型：	科技报告