基于DHSVM模型的退耕还林还草措施对黄土高原小流域径流过程影响的研究  

Study on the impact of measures of returning farmland to forest and grassland on runoff processes of small watersheds in the Loess Plateau based on the DHSVM model

作　　者：杨博文 高吉惠 Yang Bowen;Gao Jihui(College of Water Resource and Hydropower,Sichuan University,Chengdu 610065,China;State KeyLaboratory of Hydraulics and Mountain River Engineering,Sichuan University,Chengdu 610065,China)

机构地区：[1]四川大学水利水电学院,四川成都610065 [2]四川大学水力学与山区河流开发保护国家重点实验室,四川成都610065

出　　处：《吉林水利》2024年第6期33-40,共8页Jilin Water Resources

基　　金：国家自然科学基金面上项目(项目号:42271038),国家重点研发计划项目(项目号:2023YFC3206603)。

摘　　要：黄土高原是我国水土流失最严重的地区之一,为探究退耕还林还草措施对黄土高原小流域径流过程的影响,以陕西省韭园沟流域为例,利用DHSVM模型对韭园沟流域进行水文建模。模拟结果表明,坡度6°以上的退耕还林还草措施对径流深以及径流峰值的削减作用最强;从植被种类上看,森林对径流深的削减程度最强,优于灌木和草地;灌木对径流峰值的削减作用最强,优于森林和草地。因此,退耕还林还草措施可以有效削减黄土高原小流域的径流量和径流峰值,有效防止水土流失。The Loess Plateau is one of the most serious areas of soil erosion in China,in order to investigate the influence of measures of returning farmland to forest and grassland on the runoff process of small watersheds on the Loess Plateau.The hydrological modelling of the Jiuyuangou watershed in Shaanxi Province,for example,was carried out using the DHSVM model,and the simulation results showed that the measures of returning farmland to forests and grasses with slopes above 6°had the strongest effect on the reduction of runoff depth as well as runoff peak value.In terms of vegetation types,forests had the strongest reduction of runoff depth,which was better than shrubs and grasses.Shrubs have the strongest effect on the reduction of runoff peak,which is better than forests and grasslands.Therefore,the measures of returning farmland to forests and grasses can effectively reduce the runoff volume and the peak value of runoff in small watersheds in the Loess Plateau and effectively prevent soil erosion.

关 键 词：黄土高原 韭园沟流域 径流模拟 DHSVM模型 

分 类 号：P333.5[天文地球—水文科学]