| 不同源类型农业非点源负荷特征研究——以新田小流域为例 |
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| 引用本文： | 程炯,邓南荣,蔡雪娇,刘平,刘晓南.不同源类型农业非点源负荷特征研究——以新田小流域为例[J].生态环境,2008,17(6). |
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| 作者姓名： | 程炯 邓南荣 蔡雪娇 刘平 刘晓南 |
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| 作者单位： | 广东省生态环境与土壤研究所//广东省环境科学与技术公共实验室,广东,广州,510650 |
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| 基金项目： | 国家自然科学基金项目
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广东省自然科学基金项目
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| 摘 要： | 以珠江三角洲北部新田小流域为研究对象,采用源类型法,在流域范围内建立林地、果园、旱地和水田四个全封闭的农业用地单元,并对四个单元出口处的径流量进行同步采样,分析COD、BOD、氨氮、总氮和总磷等污染物的负荷特征.结果表明:(1)流域地表水存在着明显非点源污染现象,不同源类型,地表径流的污染程度不同.(2)不同源类型农业非点源污染负荷强度不同,其中水田、旱地单位面积非点源负荷强度较大,果园、林地各项污染物的负荷强度相对最小.受地表扰动、施肥等人类活动影响,流域内水田、旱地是农业非点源污染发生的关键源区.(3)流域范围内,不同源类型农业非点源负荷总量不同,其中,果园各项污染物非点源负荷总量最大,其次是林地,水田、旱地非点源负荷输出总量较小,流域范围内,源面积成为影响非点源负荷总量的主要因素.(4)相应的非点源污染治理不仅是关键源区,同时应关注大面积流失区.
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| 关 键 词： | 源类型 农业非点源 负荷特征 |
Load characteristic of agricultural non-point source pollution based on various source-types: a case study on Xintian watershed |
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| Cheng Jiong,Deng Nanrong,Cai Xuejiao,Liu ping,Liu Xiaonan.Load characteristic of agricultural non-point source pollution based on various source-types: a case study on Xintian watershed[J].Ecology and Environmnet,2008,17(6). |
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| Authors: | Cheng Jiong Deng Nanrong Cai Xuejiao Liu ping Liu Xiaonan |
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| Institution: | Cheng Jiong,Deng Nanrong,Cai Xuejiao,Liu ping,Liu Xiaonan Ecology environment , soil institute of Guangdong Province,Guangzhou 510650,China,Key laboratory of integrated control of agro-environment of Guangdong Province |
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| Abstract: | Based on source-type method, the four types, include forest, orchard, dry land, and paddy field were setup in Xintian watershed, a representational agricultural catchment in the Pearl River Delta, and load characteristic of agricultural non-point source pollution of CODCr, BOD5, NH3-N, TN, and TP, were analyzed on each type. The result showed that (1) the surface water was obviously polluted by agricultural non-point source in watershed, the degree of pollution varied with source-types, (2) the load of per ... |
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| Keywords: | source-type agricultural non-point source pollution load characteristic |
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