The SWAT model was applied to analyze the temporal-spatial distribution patterns of non-point source pollution loads and the difference of pollution loads of different land use types in Xixi Watershed of Jinjiang Basi...The SWAT model was applied to analyze the temporal-spatial distribution patterns of non-point source pollution loads and the difference of pollution loads of different land use types in Xixi Watershed of Jinjiang Basin. The results showed that both yearly nitrogen and phosphorus pollution loads were evenly distributed during 1973 to 1979,the annual TN pollution from non-point source was 1530 t,or 6. 3 kg / ha,and the annual TP pollution from non-point source was 270 t,or 1. 1 kg / ha during 1973 to 1979 in the watershed. Considerable differences were identified on both monthly nitrogen and phosphorus pollution loads. The TN and TP pollution loads during the flood season( from April to September) accounted for 76. 2% and 75. 8% of the annual load respectively. There were great differences in both TN and TP pollution loads of different land use types in the study area,and the pollution load of both farmland and orchard was higher than that of the other land use types. TN and TP pollution loads of farmland accounted for 66% and 83% of total watershed. There was a great spatial difference in the nonpoint source pollution load of the study area. The critical source areas of non-point source pollution are mainly located at Guanqiao Town,Longmen Town,Changkeng Town,Shangqing Town and Dapu Town,where the efforts of controlling pollution should be made.展开更多
目前采用SWAT(Soil Water Assessment Tool)模型可预测大流域、复杂多变的土壤类型,进而对应明确土地利用方式与管理措施条件,长期影响地方土地水分、泥沙以及化学物质变化状况。主要利用SWAT模型对湖南省沩水流域的农业面源污染情况进...目前采用SWAT(Soil Water Assessment Tool)模型可预测大流域、复杂多变的土壤类型,进而对应明确土地利用方式与管理措施条件,长期影响地方土地水分、泥沙以及化学物质变化状况。主要利用SWAT模型对湖南省沩水流域的农业面源污染情况进行模拟,提出模型应用要点,了解其模拟适用性,并最终合理分析沩水流域年径流量推算成果。展开更多
基金Supported by Key Technology Project of State Administration of Work Safety Supervision for Prevention and Control of Major Safety Accidents in 2015(Shandong-0052-2015AQ)Shandong Natural Science Foundation(ZR20-14EEP009)+1 种基金Binzhou Science and Technology Development Program(2013ZC1001)Research Fund of Binzhou University(BZXYG1414)
文摘The SWAT model was applied to analyze the temporal-spatial distribution patterns of non-point source pollution loads and the difference of pollution loads of different land use types in Xixi Watershed of Jinjiang Basin. The results showed that both yearly nitrogen and phosphorus pollution loads were evenly distributed during 1973 to 1979,the annual TN pollution from non-point source was 1530 t,or 6. 3 kg / ha,and the annual TP pollution from non-point source was 270 t,or 1. 1 kg / ha during 1973 to 1979 in the watershed. Considerable differences were identified on both monthly nitrogen and phosphorus pollution loads. The TN and TP pollution loads during the flood season( from April to September) accounted for 76. 2% and 75. 8% of the annual load respectively. There were great differences in both TN and TP pollution loads of different land use types in the study area,and the pollution load of both farmland and orchard was higher than that of the other land use types. TN and TP pollution loads of farmland accounted for 66% and 83% of total watershed. There was a great spatial difference in the nonpoint source pollution load of the study area. The critical source areas of non-point source pollution are mainly located at Guanqiao Town,Longmen Town,Changkeng Town,Shangqing Town and Dapu Town,where the efforts of controlling pollution should be made.
文摘目前采用SWAT(Soil Water Assessment Tool)模型可预测大流域、复杂多变的土壤类型,进而对应明确土地利用方式与管理措施条件,长期影响地方土地水分、泥沙以及化学物质变化状况。主要利用SWAT模型对湖南省沩水流域的农业面源污染情况进行模拟,提出模型应用要点,了解其模拟适用性,并最终合理分析沩水流域年径流量推算成果。
