| Cite this article: | 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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| Non-point Source Pollution and its Key Regions Identification in Beiru River Watershed Based on SWAT Model |
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ruan ruan, SHI Meng-meng, li hui ping, shi bei bei, wu ming zuo
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Henan Agricultural University
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| 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. |
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