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小江流域来沙量估算是三峡工程库区小江大防护工程规划补充专题研究之一。流域产沙量大小制约水库拦沙及调度排沙措施 ,直接影响工程投资、效益和运行与开县县城的防洪安全 ,故准确估算流域来沙量具有重要意义。限于泥沙资料的短缺 ,本次在外业调查、测量基础上 ,采用水沙关系法、水库拦沙率法、泥沙淤积平衡法推求了流域的来沙量 ,满足了小江大防护工程规划的要求
Estimation of sediment yield in the Xiaojiang River Basin is one of the supplementary studies on the planning of Xiaojiang River large-scale protection project in the Three Gorges Reservoir Area. It is of great significance to accurately estimate the sediment yield in the catchment due to the size of the sediment discharge in the basin restricting reservoir sediment storage and sedimentation and sediment discharge. This will directly affect project investment, efficiency and operation and flood control safety in Kaixian County. Due to the shortage of sediment data, on the basis of field surveys and surveys, the sediment yield of the basin was deduced using the sediment-water relation method, reservoir sedimentation rate method and sedimentation balance method to meet the requirements of Xiaojiang Large-scale Protection Project Claim