确定河流横向扩散系数的改进矩法

The Improved Moment Method for Determining the Transersal Dispersivity of River Stream

针对应用现有分析河流示踪试验数据，确定河流横向扩散系数Ｄｙ的矩法时，要求试验河段平均流速ｕ为已知的不足之处，并对其进行改进．应用改进矩法不仅能够计算Ｄｙ值，而且也可以计算ｕ值，从而达到减少野外试验工作量的目的．

the improved moment method for determining the transersal dispersivity of river stream with tracer test data is presented in this paper. This method may be applied in the case of average velocity of stream being unknown, and the value of may be computed, so that field test work amount of tracer test may be reduced.