计算CN值及其在黄土高原典型流域降雨-径流模拟中的应用  

Application of Computational Curve Number to Precipitation-runoff Simulation in a Typical Watershed in Chinese Loess Plateau

作　　者：李常斌[1] 秦将为[1] 李金标[1] 

机构地区：[1]兰州大学西部环境教育部重点实验室,兰州730000

出　　处：《干旱区资源与环境》2008年第8期67-70,共4页Journal of Arid Land Resources and Environment

基　　金：教育部重大项目(10425);国家自然科学基金委创新群体项目(40421101)资助

摘　　要：针对SCS模型推广应用中存在的下垫面及气候不匹配造成的精度受限问题,基于SCS模型机制,反推得到CN值计算式。根据黄土高原小流域水保观测资料就不同土地利用类型对应的计算CN值进行率定,并在径流场和流域尺度进行还原验证,效果良好,表明计算CN值是一种值得推广和借鉴的水文计算模式,有助于提升SCS模型应用于黄土高原小流域降雨-径流模拟的精度。to the flow generation mechanism of the SCS model, the computational curve number was figured out to deal with the precision limitation of SCS modeling results because of the un - matching factors caused by the SCS model validation in other regions. Based on the gauging data of the typical small watershed named Anjiagou in Chinese loess plateau, the CN was calculated and the hydrologic simulation was processed in the experi- mental fields and the whole watershed, both two satisfied modeling results, which described a foreground of the computational CN that could be applied to the hydrologic simulation in Chinese loess plateau and with a better precision in the SCS modeling for the precipitation - runoff simulation.

关 键 词：SCS模型 计算CN值 降雨-径流模拟 

分 类 号：P333.9[天文地球—水文科学]