摘要
黄河泥沙主要来自河口镇至龙门区间。这一区间的窟野河、皇甫川、无定河、秃尾河等多沙支流,上游风沙区面积大,风积沙粒径大于0.05mm的粗沙含量在90％以上。风沙通过风力吹扬和水力冲刷搬运进入河道,形成枯水期和少水年河道淤积,汛期和丰水年河道冲刷,使黄河“水大沙大”的特点十分突出。作者根据调查和实测资料分析认为,这一地区的粗沙主要来源是风沙,风沙主要来自毛乌素沙漠和库布齐沙漠,而过去认为粗沙来自流域内的黄土和下游基岩是片面的,在黄河治理开发中,除全面加强黄河中游地区水土流失治理外,对治理风沙、防止土地沙化应增加紧迫感,并提出了一些相应的防治措施。
The sediment of the Yellow River mainly comes from the tributaries between Hekouzhen and Longmen. Tributaries such as Kuye, Huangpu, Wuding and Tuwei Rivers with high sediment concentration are located in this area. The area of sand blown by the wind on the upstream of those rivers is large and the particle size greater than 0. 05 mm is more than 90%. The sand blown by wind and washed by water is transported to the river channel, forming the deposition in the dry season and scouring in the wet season, and making the characteristic of 'the more water the more sediment is contented'of the Yellow River very obviously. Based on investigation and observed data, the author considers that the coarse sediment in the region is mainly orig-inated from the sand blown by wind from Maowusu Desert and Kubuqi Desert. It is unilateral to consider that the coarse sediment in the river came from the loess and bedrock in the downstream of the basin. Besides strengthening the control of soil and water loss in the middle Yellow River in an all-round way, the author points out that it requires immediate attention on the management of the sandy area and prevention of deser-tification. In the paper, the author also recommends some relevent preventing measures.
出处
《中国水土保持》
北大核心
1992年第3期45-47,共3页
Soil and Water Conservation in China
