黄河中游粗泥沙来源探析

在钱宁等关于黄河中游粗泥沙来源宏观分析的基础上，本文进一步考虑了区域地貌特征及近年来人类活动因素的影响，对黄河中游粗沙来源区进行了更为详细的分区对比研究，并结合典型流域产沙及河道淤积历史剖面分析，全面探讨了入黄泥沙来源这一问题。

Sources of coarse sediment in middle reach of the Yellow River

Combined with the factors of regional geomorphological features and human activities,the sources of coarse sediment in the middle reach of the Yellow River is discussed in this paper by use of the measured sediment data since 1960s. It shows that the yield of coarse sediment in the middle reach of the Yellow River are decreased since 1970s with the development of water soil conservation on a large scale. The middle reach of the Yellow River is still the main sources of coarse sediment,and most of the coarse sediment (more than 85%) are from the tributaries of Kuye,Huangfu and Wuding rivers. It is very important to concentrate our efforts in water soil conservation works in these three catchments. In analyses of the typical reaches,the effects of the factors of geomorphological features and human activities on the sediment are also discussed.