关于黄河小北干流河势及浪店水源工程取水方案的研究

Studies on River Situation and Langdian Diversion Project, Xiaobeigan Main Stream of the Yellow River

黄河小北干流河道宽深比太大（４０～５２），属不稳定河道，河势受天然节点和人工整治工程的控导和水沙大幅度变化的相互作用，具有汛期大幅度变迁和非汛期局部变动的特点。解决水源工程的途径是在河道整治基础上，对河势观测资料系统分析预测，选择吴王一浪店相对稳定河段为取水段，采取建简易泵站多口分散取水，集中输送的水源工程方案。

The Xiaobeigan main stream of the Yellow River refers to the river stretch from Yumenkou to Tongguan,132.5 km long and about 4-10 km wide,having a great ratio of width to depth(40-52).It is of a meandering river.A lot of lift stations including large sized three were built here in 1960's and 1970's,they have played an important role in developing irrigation.However,owing to the meandering of the river,many a time did the water flow separate from the intakes of the lift stations,several hundred m to several thousands m or more,causing a much difficulty to the diversion,resulting in enormous losses in economy.Therefore,the writer suggested adopting a “multiple intake diversion and central delivery”scheme,that is besides the proper project like Langdian diversion project which is located on a comparative steady part of the Xiaobeigan stretch,about middle reaches of it,some other simple equipped lift stations have to be built as well on this comparative steady part on the basis of the analysis of the river situation and of the forecast of the flow pattern so as to put the “multiple intake diversion”into practice,while the water diverted should be delivered under a concentrated condition,namely,under the “central delivery”condition.The necessity of the“multiple intake diversion”in the meandering river is studied in this paper.