小浪底水利枢纽灌溉塔引水条件分析

Analysis of Water Diversion Conditions of the Irrigation Tower in Xiaolangdi Hydraulic Key Project in the Yellow River

小浪底水利枢纽灌溉塔是黄河北岸灌区引水的关键。根据枢纽泄水建筑物布置及调度方式和水库设计采用的运用方式，分析了灌溉塔前的水位变化、泥沙淤积、污物特征、含沙量等引水条件，认为不同的泄水建筑物正常开启条件下灌溉塔不会被泥沙淤堵，塔前含沙量一般可满足引水要求，但运用中要注意排污清污。小浪底水库如采用设计的逐步抬高蓄水位的运用方式，水库运用前６ａ水位不能满足引水要求。

The irrigation tower of Xiaolangdi hydraulic key project is crucial to the north irrigation areas of the Yellow River. Conditions of drawing water from the Yellow River, such as water level change in front of the tower, sedimentation, features of pollution material, sediment concentration and so on, are analyzed in the paper according to the distribution of water relief structures and their dispatching ways as well as the possible operation models of the reservoir. It is realized that the irrigation tower will not be blocked by sediment under normal operation of the water relief structures and the sediment concentration in front of the tower can meet the irrigation requirements, but some attention should be paid on pollution clearance in operation. If the operation model of lifting step by step is applied in Xiaolangdi reservoir, the water level in the first 6 years during reservoir operation will not match the demand for water drawing.