Abstract: This paper is to study a sediment yield model of middle / small watershed at the area of Three Gorges Reservoir. Based on the influence of environmental factor on the sediment yield from watershed, a calculation formula of the sediment yield from watershed is deduced. With the calculation formula of water flow, a mathematical model with clear conception and definite process and complete structure of sediment yield from watershed is developed. The model is verified with measured data of some bas

Key words: Three Gorges, watershed sediment, runoff erosion, model

摘要： 本文旨在探讨三峡库区中小流域的产沙数学模型,分析研究库区主要环境因子对流域产沙的影响,推导出流 域产沙量的计算,与产流计算公式一起,构成了概念清楚、过程明确、结构完整的流域产沙模型.将该模型用于三峡 库区部分流域的产沙验证计算,结果令人满意.

关键词: 三峡, 流域泥沙, 水流侵蚀, 模型