| 引黄灌区侧向取水口泥沙淤积和入渠特性 |
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| 引用本文： | 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. |
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| 作者姓名： | 赵琳琳 马太玲 于健 李超 胡生 李泉 |
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| 作者单位： | 1.内蒙古农业大学水利与土木建筑工程学院, 内蒙古 呼和浩特 010018; 2.三亚学院管理学院, 海南 三亚 572022; 3.内蒙古水利科学研究院, 内蒙古 呼和浩特 010020; 4.内蒙古磴口扬水灌区管理局, 内蒙古 包头 014045 |
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| 摘 要： | 以内蒙古磴口引黄扬水灌区为研究对象,根据4个灌水期泵站开、停泵时取水口前的泥沙淤积厚度以及运行期间取水流量和入渠含沙量的检测结果,研究了取水口泥沙淤积特性和入渠特性.结果表明,流速比和取水口分流宽度是影响泥沙入渠的主要因素.流速比越小,取水口分流宽度越大,横向环流作用越强,推移质入渠量越大.侧向取水的泵站,取水主流区偏向下游,当流速比增大时,取水主流区更偏向下游.在平面回流和横向环流的共同作用下,取水口推移质入渠量呈现下游大于上游的分布.取水口前设置拦沙坎可以有效地阻止推移质入渠,拦沙坎顶部设在距自由水面1.6 m以下,既可以极大地减少泥沙入渠,又可以获得较好的水流流态,防止水泵空化、气蚀.
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| 关 键 词： | 取水口 淤积特性 入渠特性 流速比 分流宽度 |
| 收稿时间： | 2013-06-24 |
Siltation features and into canal characteristics at water intake of lateral for Yellow River irrigation area |
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| 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[J].Journal of Drainage and Irrigation Machinery Engineering,2014,32(8):685-690. |
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| Authors: | Zhao Linlin Ma Tailing Yu Jian Li Chao Hu Sheng Li Quan |
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| Institution: | 1.College of Water Conservancy and Civil Engineeering, Inner Mongolia Agricultural University, Huhhot, Inner Mongolia 010018, China; 2.School of Management, Sanya University, Sanya, Hainan 572022, China; 3.Water Resources Research Institute of Inner Mongolia, Huhhot, Inner Mongolia 010020, China; 4.Inner Mongolia Dengkou Pumping Irrigation Area Authority, Baotou, Inner Mongolia 014045, China |
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| 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. |
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| Keywords: | water intake siltation features into the canal characteristics velocity ratio diversion width |
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