文档介绍：∽| |妥| 黄土丘陵沟壑区中大流域侵蚀产沙模型与|募| 尺度转换研究蔡强国1,刘纪根2,郑明国1 (, 北京100101;,湖北武汉430010) 摘要:由于侵蚀产沙因子时间和空同上的变异性,中大流域的侵蚀产抄过程模拟相对于小流域更为复杂化,目前已存在的物理模型和经验模型均难以很好地运用在中大流域。,并对尺度转换的方法进行了探讨。关键词:侵蚀产抄;中大流域f尺度;模型文献标识码:A 文章编号:1000--288X(2007)04 0131--05 中瞳分类号:S157 Sediment Yield Model and Upscaling forMedium and Large Watersheds in Hilly and Gully Region oftheLoess Plateau CAI Qiang-guo‘,LIU Jkgen2,ZHENG Ming-gu01 ( Laboratory of Water Cycle and Related Land Surface Processes,Institute of Geographic Sciences and Natural Resources Research,Chinese Academy of Sciences,BeQing 100101,China; 2 Institute ofSoil and wⅡ把rConservation,Academy ,Hubei 430010,China) Abstract:Due to the spatial and temporal variations ofenvironmental factors,the processes ofsoilerosion and sediment yield inmedium and large watersheds are much plex than those insmall watersheds. As aresult,both empirical and physics-based models can hardly beapplied inmedium and large watershed with areasonable paper first illustrates the characteristics ofsoilerosion and sediment yield in themedium and large watersheds,and thengives areview ofthemodels developed forthe methodologies toupscaling,which may be an important approach tosimulating the processes ofsoil erosion and sediment yield inthemedium and