一种单样含沙量计算方法探讨

对水面较宽、河床不稳定、主流和含沙量横向分布有变化的测站，其单断沙关系通常不好，虽然可用多条垂线沙样混全作为单沙，但仍难满足整编要求，从输沙率测验原理出发，分析了影响单断沙关系的主要因素，提出了流量加权计算单沙的方法。并详细介绍了制作单断沙关系的步骤。该方法运用于宜昌水文站后得到了单一稳定的单断沙关系，可满足整编要求，且提高了精度，该方法还具有操作简便，不增加外业测验工作量等特点。

A method for calculating single sample sediment concentration

For a hydrologic station of a wide river water surface,unstable river bed,pendulous main water now and variable lateral distribution of sediment concentration. the relationship between single sample and cross section sediment concentrations (SCS relationship,the same below)is usually out of order,Even if multiple vertical line sediment samples are combined into a single one,it cannot meet the requirement of hydrologic data processing yet.From principles for measuring sediment transport rate,the principal factors affecting SCS relationship are analysed,and a method for calculating single sample sediment concentration taking the water discharge as weight is proposed. The procedures for establishing SCS relationship using this method are described in detail.This method has been applied to the sediment measurement data processing at Yichang hydrolosical station,and obtained results show single stable SCS relationship,that's to say, this method may meet the requirement of relevant data processing,and improves the accuracy of it.In addition,he method has advantages of easily operating and no amount of field measuring work to be increased.