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首页> 外文期刊>Journal of the American Water Resources Association >DECISION FRAMEWORK FOR SEDIMENT CONTROL IN MUDDY CREEK WATERSHED
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DECISION FRAMEWORK FOR SEDIMENT CONTROL IN MUDDY CREEK WATERSHED

机译：淤泥淤泥流域泥沙控制决策框架

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摘要

The tailwater of Bridgewater Dam, below Lake James, North Carolina, is a designated trout stream. It has environmental attributes for a good cold water fishery with the exception of high suspended sediments. Muddy Creek, a tributary about 1.5 km downstream of the dam, is a major source of sediments. The Muddy Creek Watershed Restoration Initiative was established to develop and implement a sediment control plan. The Watershed Analysis Risk Management Framework was applied to simulate soil erosion and sedimentation and to help determine appropriate action. The simulated sediment concentrations of the river were comparable to observed data from November 1994 to November 2001. For the base condition, the sediment load was 135,000 kg/d from surface erosion and 1,300,000 kg/d from bank erosion. Increasing the buffer strip from existing 50 to 80 percent to 100 percent of stream segments would only reduce surface erosion to 70,400 kg/d with little change in sediment concentrations. Eliminating riverbank erosion would reduce the sediment load from 920,000 to 87,700 kg/d. The bank stabilization project would not only lower suspended sediment concentrations for Muddy Creek, but also reduce the lake sediment accumulation in the downstream Lake Rhodhiss by approximately 13 percent.
机译：北卡罗来纳州詹姆斯湖下方的布里奇沃特水坝的尾水是指定的鳟鱼溪流。除高悬浮沉积物外，它具有良好的冷水渔业环境特征。泥泞小溪是大坝下游约1.5公里的支流，是沉积物的主要来源。制定了Muddy Creek流域恢复倡议，以制定和实施沉积物控制计划。流域分析风险管理框架被用于模拟土壤侵蚀和沉积并帮助确定适当的措施。该河流的模拟沉积物浓度与1994年11月至2001年11月的观测数据相当。在基本条件下，表面侵蚀的沉积物负荷为135,000 kg / d，河岸侵蚀的沉积物负荷为1,300,000 kg / d。将缓冲带从现有河段的50％增加到80％至100％，只会将表面侵蚀减少到70,400 kg / d，而沉积物浓度变化很小。消除河岸侵蚀将使沉积物负荷从920,000千克/天减少至87,700千克/天。堤岸稳定工程不仅将降低泥泞溪的悬浮沉积物浓度，还将使下游Rhodhiss湖中的湖泊沉积物减少约13％。

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