基于水动力模型的土地利用格局对流域雨洪过程的影响研究  

Impact of land use change on catchment stormwater flooding process based on a hydrodynamic model

作　　者：孙亚联[1] 李继成[1] 杨东[2] 白岗岗 郭凯华 SUN Yalian;LI Jicheng;YANG Dong;BAI Ganggang;GUO Kaihua(Power China Northwest Engineering Corporation Limited,Xi’an 710065,China;State Key Laboratory of Eco-hydraulics in Northwest Arid Region of China,Xi’an University of Technology,Xi’an 710048,China)

机构地区：[1]中国电建集团西北勘测设计研究院有限公司,陕西西安710065 [2]西安理工大学省部共建西北旱区生态水利国家重点实验室,陕西西安710048

出　　处：《水资源与水工程学报》2020年第6期36-40,46,共6页Journal of Water Resources and Water Engineering

摘　　要：为了定量分析不同土地利用对流域雨洪过程的影响,建立流域雨洪水动力数值模型,模拟了王茂沟流域不同土地利用情景方案的地表径流过程,对比流域洪峰流量削减程度。结果表明:在重现期为2、10、50、100 a一遇降雨条件下,对于不同土地利用情景方案,林地的位置对径流量影响较大;林地位于流域坡面下部时,对洪峰流量的削减作用最大;降雨重现期越长,林地位于流域坡面下部的削峰效果越好。该研究结果在优化流域内土地利用方案规划等方面具有重要意义。To quantitatively analyze the impact of different land uses on the stormwater flooding process,a catchment hydrodynamic model was adopted to simulate the surface runoff process of Wangmaogou River Basin under different land use scenarios,meanwhile the reductions of peak discharge were compared and analyzed. The results show that the location of the forest land has a great influence on the runoff compared to the other land uses under the rainfall return period of 2 a,10 a,50 a and 100 a. When the forest land is located in the downstream of the basin,it has the largest reduction effect on the peak discharge. As the rainfall return period increases,the peak reduction effect of the forest land in the downstream of the basin becomes more remarkable. This study can provide practical guidance for the optimization of land use layout in the basin.

关 键 词：土地利用 流域雨洪过程 二维浅水方程 水动力模型 洪峰流量 

分 类 号：TV122.5[水利工程—水文学及水资源]