缺资料流域水污染物总量分配方法研究

流域水污染物总量分配对流域水环境管理至关重要。但在缺资料流域,污染负荷的计算分析往往因水文资料匮乏而变得非常困难。本文以赣江袁河流域为例,在划分流域控制单元的基础上,利用SWAT模型对袁河流量进行模拟,再结合LDC(负荷历时曲线)法,实现了袁河流域分区(控制单元)、分期(丰水期、平水期、枯水期)、分类(点源和非点源)和分级(不同水质目标)的总量分配方案。结果表明,SWAT径流模拟精度较为满意,可以为LDC法提供控制单元内部的流量;新余工业区及其下游的保留区是袁河污染物超标最为严重的区域,超标污染物主要以点源为主,其中新余工业区削减量最大。研究结果说明SWAT模型结合LDC方法可以较好地应用于资料匮乏流域的水污染物总量分配。

Study on allocation methods of the water pollutant loads in ungauged basin

The simulation and allocation of water environmental capacity are very important for catchment management,but quite difficult in ungauged basin.In this paper,SWAT model is used for non-point source simulation and LDC (Load Duration Curves) is used for water pollutant loads allocation,considering different pollution types (point sources and non-point sources),sub-regions (control units),grades (water quality objectives),and periods (low-flow period,mean flow period,and high flow period).The results show that...