长江小江流域水文比拟研究及设计应用

Hydrologic analogy study on Xiaojiang river basin and application to engineering design

小江流域是长江三峡工程库区左岸的一条支流，主流全长１８２．４ｋｍ，流域面积为５２７６ｋｍ２，是库区的重要防护区域。由于小江流域防护规划工作需要，针对流域内水文资料短缺的具体条件，进行了区域水文比拟研究，并深入现场进行历史洪水、泥沙资料调查和水文测验以补充资料不足。依据区域水文比拟研究成果，采用小江雨洪计算模型、推理公式等计算方法，推算了小江防护规划需要的设计洪水、径流和泥沙成果，得到了较正确、合理的水文分析成果。

Xiaojiang river is a left tributary of Yangtze in TGP reservoir area with the main stem of 182.4 km and drainage area of 5 276 km 2. The Xiaojiang river basin is an important area needing to be protected in the TGP reservoir area. In the light of Xiaojiang river basin protection planning and insufficient hydrological data in the basin, the regional hydrological analogy analysis,investigation of historical flood and sediment data, and hydrologic observation in field have been conducted to supplement the insufficient data. On the basis of regional hydrologic analogy analysis, the design flood, runoff and sediment parameters are computated by Xiaojiang river storm-flood computational model and rational formula etc., the results being comparatively correct and reasonable.