Abstract：Inner Mongolia Dengkou pumping irrigation area was considered as the research object, of which channel water from Yellow River. The thickness of silting in front of the intake pumping station before opening and after stopping pump in four irrigation period was measured, and water draw rate and sediment concentration into the canal was tested during the pump working. The siltation features and into canal characteristics at water inlet were studied. Results show that the velocity ratio and diversion width of the Yellow River upstream of the intake are the main factors of influence on sediment into the canal, when the flow velocity is reducing, and diversion width is increasing, the influence of cross current is more intense when more bed sediment is brought into water intake. For the lateral intake, the water mainstream area is moving to the downstream. Under both effects of flat backflow and cross current, the bed sediment distribution thickness in front of water intake appears greater at intake upstream than downstream. The block sand bar in front of intake can effectively prevent the bed load into the canal, the results indicate that the top of the block sand bar is below the free surface within 1.6 m, not only the sediment into the canal can be greatly reduced, and the better flow regime can be obtained to prevent pump cavitation.
赵琳琳,, 马太玲, 于健, 李超, 胡生, 李泉. 引黄灌区侧向取水口泥沙淤积和入渠特性[J]. 排灌机械工程学报, 2014, 32(8): 685-690.
Zhao Linlin ,, Ma Tailing, Yu Jian, Li Chao, Hu Sheng, Li Quan. Siltation features and into canal characteristics at water intake of lateral for Yellow River irrigation area. Journal of Drainage and Irrigation Machinery Engin, 2014, 32(8): 685-690.
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