黄土丘陵沟壑区中大流域侵蚀产沙模型与尺度转换研究  

Sediment Yield Model and Upscaling for Medium and Large Watersheds in Hilly and Gully Region of the Loess Plateau

作　　者：蔡强国[1] 刘纪根[2] 郑明国[1] 

机构地区：[1]中国科学院地理科学与资源研究所陆地水循环及地表过程重点实验室,北京100101 [2]长江科学院水土保持研究所,湖北武汉430010

出　　处：《水土保持通报》2007年第4期131-135,共5页Bulletin of Soil and Water Conservation

基　　金：国家基金委员会重点基金项目(40635027);国家重点基础研究发展计划973项目(2007CB407207);中国科学院地理科学与资源研究所自然科学基金延伸支持领域前沿项目(CXIOG-A04-10)

摘　　要：由于侵蚀产沙因子时间和空间上的变异性,中大流域的侵蚀产沙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。分析了中大流域的侵蚀产沙特点及已有的模型,认为尺度转换技术是实现大中流域侵蚀产沙模拟研究重要的途径,并对尺度转换的方法进行了探讨。Due to the spatial and temporal variations of environmental factors, the processes of soil erosion and sediment yield in medium and large watersheds are much more complex than those in small watersheds. As a result, both empirical and physics-based models can hardly be applied in medium and large watershed with a reasonable result. This paper first illustrates the characteristics of soil erosion and sediment yield in the medium and large watersheds, and then gives a review of the models developed for the watersheds. Some methodologies to upscaling, which may be an important approach to simulating the processes of soil erosion and sediment yield in the medium and large watershed, are also discussed.

关 键 词：侵蚀产沙 中大流域 尺度 模型 

分 类 号：S157[农业科学—土壤学]