| 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,2020,39(1):115-122. |
| ,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,2020,39(1):115-122. |
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| 摘要: |
| 【目的】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，为防治非点源污染等提供理论依据。【方法】运用ArcGIS和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模型适用于北汝河流域，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年土地利用数据模拟的泥沙、总氮、总磷负荷分别为29 088.761、78 870.342、1 025.753 t/a与25 315.033、70 560.752、1 207.841 t/a；2014年总磷负荷略有增加，其他负荷均有所下降。【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：10.13522/j.cnki.ggps.2019046 |
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| Using SWAT model to analyze non-point pollution in beiru river basin |
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YUAN Yuan, SHI Mengmeng, LI Huiping, SHI Beibei, WU Mingzuo
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College of Forestry, Henan Agricultural University, Zhengzhou 450002, China
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| Abstract: |
| 【Objective】Non-point pollution is a great environmental concern in many countries and understanding its spatiotemporal change at catchment scale is essential to better manage it. We present a method in this paper to identify non-pollution source at regional scale by using Beiru River Basin as an example.【Method】Spatial and topographic data collected from the basin was analyzed using ArcGIS and ENVI, and the results were then, along with other data, used to construct the database for the SWAT model. We applied the model to simulate temporal dynamics and spatial distribution of non-point source pollution in the basin from 2001—2015 based on the land use data in 2001 and 2014.【Result】The SWAT model was able to simulate the non-point pollution in the basin, and its R2 and Ens in calibration and verification were both higher than 0.68. The basin can be divided into 70 sub-regions and 490 hydrological response units in the SWAP model. Using the land use data in 2001 and 2014, the sediment, total nitrogen and total phosphorus simulated by the model in the basin were 29 088.761 t/a, 78 870.342 t/a and 1 025.753 t/a respectively for 2014, and 25 315.033 t/a, 70 560.752 t/a and 1 207.841 t/a respectively for 2014. Apart from total phosphorus load, which increased slightly, other loads decreased simultaneously in 2014.【Conclusion】The load of non-point source pollution in Beiru River basin was severe in flooding season, and areas that need pollution control are the cultivated land and the east and central part of the basin that are densely populated. But there is a sign that the pollution has been migrating eastwards. |
| Key words: Non-point pollution; SWAT model; Key polluted region; Beiru River watershed |
