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首页> 外文期刊>Journal of the American Water Resources Association >NUTRIENT LOADINGS TO STREAMS OF THE CONTINENTALUNITED STATES FROM MUNICIPAL AND INDUSTRIAL EFFLUENT
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NUTRIENT LOADINGS TO STREAMS OF THE CONTINENTALUNITED STATES FROM MUNICIPAL AND INDUSTRIAL EFFLUENT

机译：来自市政和工业废水对大陆洲的营养负荷

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Data from the United States Environmental Protection Agency Permit Compliance System national database were used to calculate annual total nitrogen (TN) and total phosphorus (TP) loads to surface waters from municipal and industrial facilities in six major regions of the United States for 1992, 1997, and 2002. Concentration and effluent flow data were examined for approximately 118,250 facilities in 45 states and the District of Columbia. Inconsistent and incomplete discharge locations, effluent flows, and effluent nutrient concentrations limited the use of these data for calculating nutrient loads. More concentrations were reported for major facilities, those discharging more than 1 million gallons per day, than for minor facilities, and more concentrations were reported for TP than for TN. Analytical methods to check and improve the quality of the Permit Compliance System data were used. Annual loads were calculated using "typical pollutant concentrations" to supplement missing concentrations based on the type and size of facilities. Annual nutrient loads for over 26,600 facilities were calculated for at least one of the three years. Sewage systems represented 74% of all TN loads and 58% of all TP loads. This work represents an initial set of data to develop a comprehensive and consistent national database of point-source nutrient loads. These loads can be used to inform a wide range of water-quality management, watershed modeling, and research efforts at multiple scales.
机译：美国环境保护局许可证合规系统国家数据库中的数据用于计算1992、1997年美国六个主要地区的市政和工业设施向地表水的年度总氮（TN）和总磷（TP）负荷和2002年。对45个州和哥伦比亚特区约118,250个设施的浓度和废水流量数据进行了检查。排放位置不一致和不完全，废水流量和废水中的养分浓度限制了使用这些数据来计算养分含量。据报告，大型设施的浓度高于小型设施，每天排放量超过一百万加仑的设施，而TP的浓度高于TN。使用了分析方法来检查和改善许可证合规系统数据的质量。使用“典型污染物浓度”来计算年负荷，以根据设施的类型和规模补充缺失浓度。在至少三年中，至少有一年计算了超过26,600个设施的年度养分负荷。污水处理系统占所有TN负荷的74％，占所有TP负荷的58％。这项工作代表了一套初步的数据，用于建立一个全面，一致的点源养分负荷国家数据库。这些负载可用于为广泛的水质管理，分水岭建模和多个规模的研究工作提供信息。

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