基于SWAT模型的农业施肥对梅江流域营养盐产出变化的影响分析  

Analysis of the Effect of Agricultural Fertilization on the Change ofNutrient Output in Meijiang River Basin Based on SWAT Model

作　　者：陈迎 CHEN Ying(School of Geography and Environment,Jiangxi Normal University,330022,Nanchang,PRC)

机构地区：[1]江西师范大学地理与环境学院,南昌330022

出　　处：《江西科学》2021年第4期641-647,共7页Jiangxi Science

基　　金：国家自然科学基金项目(40971266)。

摘　　要：以梅江流域为研究区域,基于SWAT模型构建适用于该流域的氮磷污染负荷模型,模拟分析了农业施肥影响下的流域内氮、磷营养盐产出的时空分布变化特征,为该流域营养盐污染控制和综合治理提供有益参考。结果表明:1)研究区氮、磷营养盐产出的增加与农业化肥的施用有关,在时间变化上,2011年流域内总氮和总磷的产出分别增长了99.33 mg/L和17.64 mg/L,总氮、总磷负荷产出的增加主要集中在4—8月,分别占全年总产出的87.3%和68.5%;2)在空间分布上,总氮、总磷污染负荷变化的空间分布特征基本一致,均集中在研究区的中部和北部。The paper takes the Meijiang watershed as the research area,based on the SWAT model,a nitrogen and phosphorus pollution load model suitable for the watershed was constructed,and the characteristics of the temporal and spatial distribution of nitrogen and phosphorus nutrient output in the watershed under the influence of agricultural fertilization were simulated and analyzed,providing a useful reference for nutrient pollution control and comprehensive management in the basin.The results showed that:1)The increase in the output of nitrogen and phosphorus nutrients in the study area is related to the application of agricultural fertilizers.In terms of time changes,the output of total nitrogen and total phosphorus in the basin increased by 99.33 mg/L and 17.64 mg/L respectively in 2011.The increase in total nitrogen and total phosphorus load output was mainly concentrated in April to August.They accounted for 87.3%and 68.5%of the annual total output respectively;2)In terms of spatial distribution,the spatial distribution characteristics of total nitrogen and total phosphorus pollution load changes are basically the same,and they are concentrated in the central and northern parts of the study area.

关 键 词：梅江流域 SWAT模型 农业施肥 营养盐产出 

分 类 号：X522[环境科学与工程—环境工程]