基于SWAT模型的莲塘口流域农业面源污染模拟

发布时间：2018-05-28 12:24

本文选题：面源污染 + 模型　；参考：《武汉大学学报(工学版)》2016年03期

【摘要】：以浙江省金华市莲塘口流域为研究区,基于SWAT模型建立适用于该流域的面源污染分布式模型,模拟分析了研究区不同土地利用方式以及不同施肥制度下氮磷负荷的排放,识别关键污染源的贡献,为该区域面源污染控制和综合治理提供科学依据.结果表明:研究区单位面积总氮、总磷排放负荷较大的土地类型分别为住宅用地、水稻田,但总氮、总磷排放负荷总量最大的土地类型均为水稻田;种植施肥、农村生活和畜禽养殖排放产生的总氮、总磷负荷分别占流域总量的71.1%和50.2%,其中,由于种植施肥排放的总氮、总磷分别占流域总氮、总磷排放总量的55.4%和48.1%;减少水稻田的施肥量可以有效降低农田氮磷污染负荷的排放量,但增加施肥次数无显著减排效果.
[Abstract]:Based on the SWAT model, a distributed model of non-point source pollution was established in the Liantangkou Basin of Jinhua City, Zhejiang Province. The nitrogen and phosphorus load emissions under different land use patterns and different fertilization systems in the study area were simulated and analyzed. To identify the contribution of key pollution sources and provide scientific basis for the control and comprehensive control of non-point source pollution in this area. The results showed that the types of land with large total nitrogen and total phosphorus emission load per unit area were residential land and paddy field respectively, but the largest total nitrogen and total phosphorus emission load were paddy fields, planting and fertilizing. The total nitrogen and total phosphorus load from rural life and livestock and poultry production accounted for 71.1% and 50.2% of the total drainage area, respectively. Among them, total phosphorus accounted for the total nitrogen in the watershed because of the total nitrogen discharged from planting and fertilization. The total phosphorus emission was 55.4% and 48.1% of the total phosphorus emission, and the reduction of fertilizer application in paddy fields could effectively reduce the nitrogen and phosphorus pollution load emissions, but the increase of fertilization frequency had no significant effect on emission reduction.
【作者单位】：武汉大学水资源与水电工程科学国家重点实验室;浙江省永康市农村水利管理站;
【基金】：水利部公益性行业专项经费项目(编号:201301012) 高等学校博士学科点专项科研基金(编号:20130141110014)
【分类号】：X71;X52

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