基于SWAT模型的北汝河流域非点源污染及其关键区域识别

袁远; 石蒙蒙; 李会平; 史贝贝; 吴明作

引用本文:	袁远,石蒙蒙,李会平,等.基于SWAT模型的北汝河流域非点源污染及其关键区域识别[J].灌溉排水学报,0,():-.
	ruan ruan,SHI Meng-meng,li hui ping,et al.基于SWAT模型的北汝河流域非点源污染及其关键区域识别[J].灌溉排水学报,0,():-.

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基于SWAT模型的北汝河流域非点源污染及其关键区域识别
袁远, 石蒙蒙, 李会平, 史贝贝, 吴明作
河南农业大学林学院

摘要:

[目的]为了解北汝河流域非点源污染的时空分异,识别关键区域与重要时期,为非点源污染防治等提供理论依据。[方法]运用ArcGIS与ENVI软件与相关数据构建SWAT模型数据库,基于2001年与2014年土地利用数据,利用SWAT模型模拟了北汝河流域2001～2015年间非点源污染的时间动态与空间分异特征。[结果]SWAT模型在北汝河流域适用性良好,校准期和验证期的R²和Ens均达到0.68以上,将该流域划分为70个子流域490个水文响应单元；以2001年与2014年土地利用数据分别模拟的泥沙、总氮、总磷负荷为29088.761 t/a、78870.342 t/a、1025.753 t/a与25315.033 t/a、70560.752 t/a、1207.841 t/a；2014年总磷负荷略有增加,其它负荷均有所下降。[结论]北汝河流域非点源污染负荷在汛期较为严重,以东部、中部的耕地与居民聚集区为关键控制区,且在东部有扩大趋势。

关键词: 非点源污染；SWAT模型；关键区域；北汝河流域

DOI：

分类号:X522

基金项目:国家重点研发计划项目(2018YFD0800405-04)

Non-point Source Pollution and its Key Regions Identification in Beiru River Watershed Based on SWAT Model

ruan ruan, SHI Meng-meng, li hui ping, shi bei bei, wu ming zuo

Henan Agricultural University

Abstract:

[object] to understand the spatial-temporal differentiation of non-point source pollution in BeiRu River watershed, identify key regions and important periods, and to provide theoretical basis for the prevention and control of non-point source pollution. [method] the spatial and topographic data was analyzed by ArcGIS and ENVI software, and used with other relative data to construct the SWAT model database, then the SWAT model was used to simulate the temporal dynamics and spatial differentiation characteristics of non-point source pollution in BeiRu River watershed during 2001-2015 based on the land utilization data. [result] The SWAT model has good applicability in Beilu River watershed. The R² and Ens of calibration period and verification period are all more than 0.68. The watershed can be divided into 70 sub-regions and 490 hydrological response units. Based on land-use data of 2001 and 2014, the sediment, total nitrogen and total phosphorus simulated reached to 29088.761 t/a, 78870.342 t/a, 1025.753 t/a, 25315.033 t/a, 70560.752 t/a, 1207.841 t/a, respectively. As for the year 2014, the total phosphorus load increased slightly and the other loads decreased. [conclusion] The load of non-point source pollution in Beiruhe River watershed is serious in flood season. The key control region is cultivated land and population concentration area in the east and central part of the watershed. The pollution statue of eastern region has an aggravating trend.

Key words: Non-point;pollution, SWAT;model, Key;region, Beiruhe;River watershed.