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原文传递 Analysis of Salinity Intrusion in the Waccamaw River and Atlantic Intracoastal Waterway Near Myrtle Beach, South Carolina, 1995-2002.

题名：	Analysis of Salinity Intrusion in the Waccamaw River and Atlantic Intracoastal Waterway Near Myrtle Beach, South Carolina, 1995-2002.
作者：	conrads, p. a. roehl, e. a.
关键词：	reservoirs, discharge(water), coastal regions, fresh water, stream flow, rivers, tides, hydrodynamics, south carolina
摘要：	Six reservoirs in North Carolina discharge into the Pee Dee River, which flows 160 miles through South Carolina to the coastal communities near Myrtle Beach, South Carolina. During the Southeast's record-breaking drought from 1998 to 2003, salinity intrusions inundated a coastal municipal freshwater intake, limiting water supplies. To evaluate the effects of regulated flows of the Pee Dee River on salinity intrusion in the Waccamaw River and Atlantic Intracoastal Waterway, the South Carolina Department of Natural Resources and a consortium of stakeholders entered into a cooperative agreement with the U.S. Geological Survey to apply data-mining techniques to the long-term time series to analyze and simulate salinity dynamics near the freshwater intakes along the Grand Strand of South Carolina. Salinity intrusion in tidal rivers results from the interaction of three principal forces--streamflow, mean tidal water levels, and tidal range. To analyze, model, and simulate hydrodynamic behaviors at critical coastal gages, data-mining techniques were applied to over 20 years of hourly streamflow, coastal water-quality, and water-level data. Artificial neural network models were trained to learn the variable interactions that cause salinity intrusions. Streamflow data from the 18,300-square-mile basin were input to the model as time-delayed variables and accumulated tributary inflows. Tidal inputs to the models were obtained by decomposing tidal water-level data into a periodic signal of tidal range and a chaotic signal of mean water levels. The artificial neural network models were able to convincingly reproduce historical behaviors and generate alternative scenarios of interest. / NOTE: Scientific investigations rept. / Supplementary Notes: Prepared in cooperation with South Carolina Dept. of Natural Resources, Columbia. / Availability Note: Order this product from NTIS by: phone at 1-800-553-NTIS (U.S. customers); (703)605-6000 (other countries); fax at (703)605-6900; and email at orders@ntis.gov. NTIS is located at 5285 Port Royal Road, Springfield, VA, 22161, USA.
总页数：	u0813；52p
报告类型：	科技报告