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泥沙密度是河流泥沙的主要物理特性之一。本项试验研究采集了黄河干支流２３个水文站５２６个泥沙样品，基本覆盖了黄河上、中、下游各河段及主要支流泥沙来源区，泥沙样品具有广泛的代表性。分析结果表明：泥沙密度与垂线上不同位置处的泥沙颗粒级配无关，与含沙量之间也没有明显的关系；自上游至下游，泥沙密度沿程略有变化，年际间比较稳定。最后建议泥沙密度值上游区选用２７４ｇ／ｃｍ３，中游区选用２７３ｇ／ｃｍ３，下游区选用２７１ｇ／ｃｍ３。
Sediment density is one of the major physical characteristics of river sediment. This pilot study collected 526 sediment samples from 23 hydrological stations in the Yellow River and its tributaries, covering basically all river sections in the upper, middle and lower reaches of the Yellow River and main sediment source areas. Sediment samples are widely representative. The results show that the density of sediment has nothing to do with the distribution of sediment particles at different positions on the vertical line and has no obvious relationship with the sediment concentration. From upstream to downstream, the sediment density changes slightly along the process, Between the more stable. Finally, it is suggested that the sediment density should be 2.74 g / cm3 upstream, 273 g / cm3 in the middle and 271 g / cm3 in the downstream.