OALib Journal期刊
ISSN: 2333-9721
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太湖流域浙西区不同土地类型的面源污染产出
DOI: 10.11821/xb200403010, PP. 401-408
Keywords: 太湖流域,浙西水利分区,土地利用,面源污染
Abstract:
以太湖流域浙西水利分区为研究区,采用Arcgis的水文分析模块,对浙西区进行流域划分,选取以单一农业用地为主的子流域,利用GIS叠加分析方法,获取各子流域的降水、径流深度、土地利用结构信息,分析研究区主要土地利用类型与径流量的统计关系,建立该区年尺度的径流估算模型。基于林地、耕地为主的子流域水质监测数据,结合径流估算模型,分析占该区90%土地利用面积的林地、耕地与径流污染物浓度的定量关系,研究结果显示,该研究区以林地为主的流域径流各水环境指标为COD浓度为2.95mg/l,BOD浓度为1.080mg/l,总氮浓度为0.715mg/l,总磷浓度为0.039mg/l;耕地为主的流域径流水环境指标为COD浓度为5.721mg/l,BOD浓度为3.097mg/l,总氮浓度为2.092mg/l,总磷浓度为0.166mg/l。这一研究结果适合应用于太湖流域上游山区、丘陵地区年尺度面源污染估算。
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