摘要
以黑河莺落峡流域的精度30m、地形图比例尺1∶5万的数字高程模型(DEM)栅格网为基础,辅以黑河地区水文站点降水资料,运用PRISM算法内插降水要素,充分考虑高程、地形、距离等因子对降水的影响,在内插结果与实测资料对比精度满意的前提下,使用TOPMODEL对黑河莺落峡流域(10009km2)径流流量进行逐日模拟,模型模拟精度达70%左右。
Though the Heihe River is one of the largest inland rivers in northwest China,its water supply is far from adequate to meet the water demand.In order to practice water allocation,water saving irrigation,and integrated management of the water resource,a study was carried out to make use of TOPMODEL in simulating the hydrological processes of the Yingluoxia Catchment(10 009 km^2)in Heihe region.Traditionally,only data from the end station of this area were used as grid data of the whole catchment.They couldn′t describe the spatial variation of altitude-dependent precipitation in such a large basin.Hence,based on DEM precipitation data from about 10 stations were interpolated by using the PRISM approach with major control factors such as altitude,landform and distance.On the premise that the comparison between the results of the interpolation and the data of field investigation showed improved precision.TOPMODEL was then used to simulate daily volume of runoff in the catchment with satisfactory results,being 70% or so in prediction precision.
出处
《农村生态环境》
CSSCI
CSCD
北大核心
2004年第2期16-20,共5页
Rural Eco-Environment
基金
国家重点基础研究发展规划项目(2001CB309404)
杰出青年B类项目(40128001)
教育部重点科学技术项目(2001)
