黄河流域三门峡水文测区泥沙密度试验分析

Analysis on Sanmenxia Measurement Area Sediment Density Test of Yellow River Basin

黄河流域三门峡水文测区地处黄河中下游,测区所辖水文站分布在晋、陕、甘、豫区间,是黄河流域多沙、粗沙区,也是治理黄河泥沙的重点区域。多年来,测区各水文站大多采用置换法推求泥沙水样的沙重,泥沙密度值均取经验值2.70 g/cm^3。为了验证这一数值的准确性,在1990~1995年试验的基础上,于2007年和2013年,在本测区黄河干流和重要支流的12个水文站和库区取样,进行密度试验。通过统计分析,求出本测区黄河干流各站的泥沙密度值为2.71g/cm^3、支流各站的泥沙密度为2.73g/cm^3。

Bureau of Hydrology and Water Resource of Sanmenxia reservoir area is located in the middle and lower reaches of Yellow River. The hydrologic stations of this area are distributed in Shanxi, Shaanxi, Gansu, Henan provinces. This area has much and coarse sand and is the key district to be treated. In many years, each hydrological station used the empirical value 2.70 g/cm3 as the sediment density and adopted the substitution method to get the sample water sand weight. In order to verify the value veracity, based on the tests from 1990 to 1995, it did several hundred density tests of sample sediment in reservoir and 12 hydrological stations of Yellow River main stream and important tributary in 2007 and 2013. Ac- cording to the statistics analysis, it gets the sediment density value 2.71g/cm3 of Yellow River main streams and the sediment density value 2.73g/cm3 of Yellow River tributaries.