Li Zhu Heng, Liu Miao, Li Chun Lin, Sun Ju, Sui Jin Ling, Wu Yi Lin
Jilin Provincial Institute of Education, Changchun 130022, China.
Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang 110016, China.
Ying Yong Sheng Tai Xue Bao. 2016 Sep;27(9):2891-2898. doi: 10.13287/j.1001-9332.201609.004.
Non-point source (NPS) pollution has become a major source of water pollution in recent years. The research of NPS pollution mechanism and control has an important scientific and practical meaning. To study the effect of land use change on NPS pollution load, near future land use of Hun-Taizi River watershed was simulated under three scenarios based on CLUE-S model, including urban planning, historical trend and ecological protection scenarios. NPS pollution was simulated based on SWAT model. The simulated results of SWAT were compared with measured data. The response of NPS pollution to land use change and landscape pattern was studied with the combination of the two models in three land use scenarios. The results showed that the NPS pollution simu-lation with SWAT had high accuracy, which showed the suitability of SWAT model in the study area. The NPS pollution load increased under urban planning and historical trend scenarios but decreased under ecological protection scenario. The difference in three scenarios indicated that land use and landscape pattern impacted NPS to a certain extent, which showed that scientific ecological construction could effectively reduce NPS pollution load. This study provided a new study case for NPS pollution research at watershed scale, a scientific basis for implementation of non-point source pollution control and best management practices, and a reference for related policy making.
近年来，非点源污染已成为水污染的主要来源。对非点源污染机制及控制的研究具有重要的科学和现实意义。为研究土地利用变化对非点源污染负荷的影响，基于CLUE-S模型，在城市规划、历史趋势和生态保护三种情景下模拟了浑太子河流域近期的土地利用情况。基于SWAT模型对非点源污染进行了模拟。将SWAT模型的模拟结果与实测数据进行了比较。结合这两个模型，在三种土地利用情景下研究了非点源污染对土地利用变化和景观格局的响应。结果表明，利用SWAT模型进行非点源污染模拟具有较高的精度，表明SWAT模型在研究区域具有适用性。在城市规划和历史趋势情景下，非点源污染负荷增加，而在生态保护情景下则减少。三种情景的差异表明，土地利用和景观格局在一定程度上影响了非点源污染，这表明科学的生态建设可以有效降低非点源污染负荷。该研究为流域尺度非点源污染研究提供了新的研究案例，为实施非点源污染控制和最佳管理措施提供了科学依据，并为相关政策制定提供了参考。
