连续点源河流污染带几何特征参数研究  

Study on geometric features of river pollutant zone caused by continuous point sources

作　　者：薛红琴[1] 刘晓东[2] 

机构地区：[1]南京林业大学土木工程学院,江苏南京210037 [2]河海大学环境科学与工程学院,江苏南京210098

出　　处：《水资源保护》2005年第5期23-26,共4页Water Resources Protection

摘　　要：全面探讨连续点源河流污染带的几何特征,在考虑了两岸边界的一次反射、污染物的降解和背景值共同影响的条件下,给出排污口在任意位置的污染带特征参数的计算方法,在简化情况下给出了直接计算公式。这些几何特征参数包括污染物达到全断面均匀混合的距离、污染带最大长度、最大宽度及其出现的位置、污染带面积等。并利用污染带的几何特征参数反演推算了允许排污量和削减量。所提方法独特,简便易行,具有较高精度,可用于河流污染带预测。The geometric features of pollutant zone in natural rivers were discussed comprehensively. Taking boundary reflection, natural degradation and background value into consideration, methods for calculating characteristic parameters of pollutant zone with ouffalls randomly placed were presented, and formulas under simplified conditions were proposed. The present geometric characteristic parameters include the distance from the ouffall to the place where the pollutants are uniformly mixed, the maximal length and width of pollutant zone, the place where the maximal width is located, and the zone area. Based on the geometric characteristics of the zone, the allowable discharge amount and the cut-down amount were estimated by inversion method. With the advantage of simpleness, feasibility and high precision, this method can be used for prediction of pollutant zone in rivers.

关 键 词：污染带 几何特征参数 点源 河流 

分 类 号：X52[环境科学与工程—环境工程]