土地覆被变化对河源区小流域径流模拟影响分析研究

南京大学学报(自然科学版) ›› 2016, Vol. 52 ›› Issue (1): 142–148.

土地覆被变化对河源区小流域径流模拟影响分析研究

徐静1,2*，华健2，闫中月2

出版日期:2016-01-27 发布日期:2016-01-27
作者简介:(1. 南京大学表生地球化学教育部重点实验室,南京,210023;2. 南京大学地球科学与工程学院水科学系,南京,210023)
基金资助:
基金项目:国家自然科学基金青年科学基金(41201022),国家水体污染控制与治理科技重大专项(2014ZX07204-005)
收稿日期:2015-11-15
*通讯联系人,E-mail:xujing@nju.edu.cn

Study on effect of land cover change on runoff simulation result in a headstream watershed

Xu Jing1,2*, Hua Jian2, Yan Zhongyue2

Online:2016-01-27 Published:2016-01-27
About author:(1. Key Laboratory of Surficial Geochemistry, Ministry of Education, Nanjing, 210093, China; 2. Department of Hydrosciences, School of Earth Sciences and Engineering, Nanjing University, Nanjing, 210093, China)

摘要/Abstract

摘要： 以颍河源头流域告成集水区为研究区域，根据区域相关规划构建森林覆被、现状覆被以及耕地覆被情景，利用BTOPMC (Block-wise use of TOPMODEL with the Muskingum-Cunge method) 模型模拟分析不同土地覆被情景下的径流过程，研究结果表明：研究区域由现状覆被转变为森林覆被会使得流域蒸散发能力增加25.3%，截留蒸发和土壤蒸散发量分别增大13.9%和18.4%，进而导致总径流量、地表径流以及基流量分别减少45.5%、54.6%和42.4%；由现状覆被向耕地覆被转变会导致蒸散发能力和土壤蒸散发量分别减小27.4%和20.9%，进而导致总径流量、地表径流以及基流量分别增加48.2%、63.0%和43.2%。地表径流对土地覆被变化的响应较基流敏感，雨季期间土地覆被变化对径流的影响较枯季显著。

Abstract: The headstream watershed controlled by the Gaocheng hydrological station was selected as study area. Three land cover scenarios such as forest land, current situation and crop land were constructed according the existing planning. The runoff simulation under different land cover scenarios was conducted with BTOPMC (Block-wise use of TOPMODEL with the Muskingum-Cunge method) model. The result showed that if the current land cover converted into forest land cover scenario, the potential evapotranspiration, soil evaporation and interception evaporation increased by 25.3%, 13.9% and 18.4%, respectively, meanwhile the total runoff, overland flow and base flow reduced by 45.5%, 54.6% and 42.4%, respectively. When/If the current land cover converted into crop land cover scenario, the potential evapotranspiration and soil evaporation reduced by 27.4% and 20.9% respectively, and the total runoff, overland flow and base flow increased by 48.2%, 63.0% and 43.2% respectively. The overland flow response to land cover change was more sensitive than that to base flow. The effect of land cover change on runoff was more remarkable in wet season than that in dry season.

徐静1,2*，华健2，闫中月2. 土地覆被变化对河源区小流域径流模拟影响分析研究[J]. 南京大学学报(自然科学版), 2016, 52(1): 142–148.

Xu Jing1,2*, Hua Jian2, Yan Zhongyue2. Study on effect of land cover change on runoff simulation result in a headstream watershed[J]. Journal of Nanjing University(Natural Sciences), 2016, 52(1): 142–148.

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