水体污染负荷 (pollution load of water) 污染物质在地表水中污染程度的度量。单位为g/s、kg/d或t/d。对于工业点污染源可简单地用浓度曲线表示,单位为mg/L或ppm。对于面污染源常用流量和浓度的乘积作出负荷过程线表示。负荷过程线受地区的水文、气象和地质等条件影响,具有随机性。水体污染负荷通常可用L=KCQ估算。式中,L为负荷(kg/d);K为单位换算系数;C浓度(mg/L),Q为河水流量(m3/s)。
城边流域的管理通常采用综合模拟的方案来评估土地利用活动对水体污染负荷的影响。
Urban fringe watershed management often requires the use of integrated modeling procedure to evaluate the effects of land use and practices on pollutants loading to water bodies.
随着对水体点源污染的有效控制,水体负荷结构发生了明显的变化。
The load composition of water pollution has been changed obviously with the effectively control on point source pollution in recent years.
在控制污染负荷排放的同时,也要保证河流基本流量,提高水体自净能力,改善渭河水体的污染现状。
To improve the self-purification ability and pollution situation of river water, control the pollution load and ensure the river basic flow are two important ways.
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