簸箕李灌区泥沙远距离输送的研究

Study on long distance transport of sediment in Bojili irrigation district

目前，引黄灌区渠首集中处理泥沙的模式已受到很大的限制，进一步研究分散处理泥沙的模式是非常必要的．本文在山东簸箕李灌区的基础上，分析水沙资料，总结灌区泥沙输送的经验，以水沙运动规律为依据，通过水沙调度和工程措施进行泥沙远距离输送，以达到分散利用和处理泥沙的目的．本文内容对其它灌区的泥沙输送具有重要的参考价值．

There were some troubles in the irrigation districts of the Lower Yellow River be cause of much sediment deposition occurred near the head areas of irrigation districts. Based on the practice of irrigation and the analysis of information from Bojili irrigation district,it is possible to transport sediment in a long distance by comprehensive using some special measures: 1. To regulate the sediment concentration and water discharge so as to fit the sedi ment carrying capacity of flow in canal. 2. To improve the boundary factors,such as to reduce the roughness of canal by con creted surface,to make a nonsingle cross-section with reasonable bed width and side slope, and to increase the canal slope etc. 3. To improve the irrigation management according to the water demand of farmland and other water-saving measures so as to reduce the sediment from the Lower Yellow Riv er. 4. To make some engineering measures,such as reconstruction of aqueducts crossing the drainage canals and bridges to reduce the upstream water level. 5. To use the pumping irrigation in the lower canal so as to pump more sediment from the canal to field.