Soil and Water Assessment Tool(SWAT)is an efficient model to simulate hydrology and water quality in large watersheds. During the past decades, SWAT has been used as a decision support tool to evaluate environmental e...Soil and Water Assessment Tool(SWAT)is an efficient model to simulate hydrology and water quality in large watersheds. During the past decades, SWAT has been used as a decision support tool to evaluate environmental effects of land usage change, BMPs, and hydraulic structures in Great Lakes watersheds. In addition, it has been increasingly used to predict water resources under different climate change scenarios. This paper briefly reviewed SWAT applications in various watersheds draining into the Great Lakes and intended to provide readers with insights regarding water quality issues in the Great Lakes concerned by researchers and capability of SWAT in dealing with those problems. Future development of SWAT with respect to dealing with cold region climate and vegetation conditions was also discussed.展开更多
为探究洞里萨湖流域土地利用变化对湖泊水质的影响,以MODIS土地覆盖产品(MCD12Q1)、湖泊浊度和营养状态指数为数据源,结合地理信息系统(geographic information system,GIS)空间分析、Theil-Sen Median趋势分析、Mann-Kendall检验和相...为探究洞里萨湖流域土地利用变化对湖泊水质的影响,以MODIS土地覆盖产品(MCD12Q1)、湖泊浊度和营养状态指数为数据源,结合地理信息系统(geographic information system,GIS)空间分析、Theil-Sen Median趋势分析、Mann-Kendall检验和相关性分析等方法,系统研究该流域近20年土地利用与湖泊水质的时空变化特征及两者间的关联性。结果表明:洞里萨湖流域土地利用以林地显著减少(P<0.01)和草地、耕地显著增加(P<0.01)为主要特征,年均变化率分别达到了流域总面积的-1.13%、0.8%和0.35%;相应地,湖泊浊度和营养状态指数亦为上升趋势,但未通过显著性检验。研究时段内,湖泊浊度与林地强负相关(r=-0.65),与草地、耕地和建设用地强正相关,相关系数分别为0.61、0.74、0.72,与湿地弱正相关(r=0.35);然而,湖泊营养状态指数仅与湿地弱负相关(r=-0.31)。研究结论为认识洞里萨湖水质变化的驱动因子与流域管理提供科学参考。展开更多
文摘Soil and Water Assessment Tool(SWAT)is an efficient model to simulate hydrology and water quality in large watersheds. During the past decades, SWAT has been used as a decision support tool to evaluate environmental effects of land usage change, BMPs, and hydraulic structures in Great Lakes watersheds. In addition, it has been increasingly used to predict water resources under different climate change scenarios. This paper briefly reviewed SWAT applications in various watersheds draining into the Great Lakes and intended to provide readers with insights regarding water quality issues in the Great Lakes concerned by researchers and capability of SWAT in dealing with those problems. Future development of SWAT with respect to dealing with cold region climate and vegetation conditions was also discussed.
文摘为探究洞里萨湖流域土地利用变化对湖泊水质的影响,以MODIS土地覆盖产品(MCD12Q1)、湖泊浊度和营养状态指数为数据源,结合地理信息系统(geographic information system,GIS)空间分析、Theil-Sen Median趋势分析、Mann-Kendall检验和相关性分析等方法,系统研究该流域近20年土地利用与湖泊水质的时空变化特征及两者间的关联性。结果表明:洞里萨湖流域土地利用以林地显著减少(P<0.01)和草地、耕地显著增加(P<0.01)为主要特征,年均变化率分别达到了流域总面积的-1.13%、0.8%和0.35%;相应地,湖泊浊度和营养状态指数亦为上升趋势,但未通过显著性检验。研究时段内,湖泊浊度与林地强负相关(r=-0.65),与草地、耕地和建设用地强正相关,相关系数分别为0.61、0.74、0.72,与湿地弱正相关(r=0.35);然而,湖泊营养状态指数仅与湿地弱负相关(r=-0.31)。研究结论为认识洞里萨湖水质变化的驱动因子与流域管理提供科学参考。
