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首页> 外文会议>Annual Water Environment Federation technical exhibition and conference >Application of the HEC-RAS hydraulic and water quality model to support the development of the lower Minnesota River TMDL
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Application of the HEC-RAS hydraulic and water quality model to support the development of the lower Minnesota River TMDL

机译：HEC-RAS液压和水质模型的应用支持下明尼苏达河TMDL的发展

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摘要

This paper presents the latest HEC-RAS hydraulic and water quality model and its application to the Lower Minnesota River (LMNR) in support of the development of total maximum daily load (TMDL) and assessment of riverine water quality. The LMNR has been listed as impaired because of high algal biomass and dissolved oxygen depletion during low discharge periods, deposition of nutrient-rich sediment, and excessive loads of nitrogen and phosphorus to the system. These concerns have led to the development of the TMDL for establishing goals for load reduction of point and nonpoint sources and evaluation of management scenarios to improve current water quality conditions in the system. The HEC-RAS model was calibrated and validated with an extensive set of field data collected during a six-year period (2001 - 2006). The field measurements agree considerably well with the model results for flow and water quality constituents including temperature, inorganic suspended solids, algae, organic phosphorus and nitrogen, phosphate, ammonia, nitrate, and dissolved oxygen. With rare exceptions, the statistical measures of HEC-RAS model performance were excellent. The HEC-RAS model was able to support the development of the lower Minnesota River TMDL and predict the behavior of the water quality responses for external nutrient loading reduction scenarios.
机译：本文介绍了最新的HEC-RAS液压和水质模型及其在小明尼苏达河（LMNR）的应用，以支持开发总日载量（TMDL）和河流水质的评估。 LMNR已被列为由于高排出期间的藻类生物量和溶解氧耗量高，富含营养素的沉积物，以及对系统的过度氮和磷的过度载荷，并且对系统的含量过多。这些问题导致了TMDL的发展，用于建立负荷减少点和非点来源的目标以及管理场景评估，以改善系统中的水质质量条件。 HEC-RAS模型被校准并验证，并在六年期间收集了广泛的现场数据（2001年 - 2006年）。现场测量与包括温度，无机悬浮固体，藻类，有机磷和氮，磷酸盐，氨，硝酸盐和溶解氧的模型结果相比很好地吻合良好。由于稀有例外，HEC-RAS模型性能的统计措施优异。 HEC-RAS模型能够支持小明尼苏达河TMDL的发展，并预测外部营养加载减少情景的水质反应的行为。

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