Model of water-sediment regulation in Yellow River and its effect
Model of water-sediment regulation in Yellow River and its effect
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DOI：
10.1007/s11431-011-4322-3
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发表时间：
2011-03
期刊：
影响因子：
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通讯作者：
Guoying Li;L. Sheng
中科院分区：
文献类型：
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作者：
Guoying Li;L. Sheng
黄河调水调沙是通过干支流水库对下游河道的水沙关系进行调控，使下游河道水沙平衡，最大限度地发挥下游河道的输沙能力，遏制河道萎缩，恢复和维持中洪水河道。黄河水利委员会多年的研究揭示了防止下游河道淤积的水沙关系。根据这一关系，结合黄河未来的水沙条件，黄河水利委员会在充分利用干支流水库的基础上，提出了3种水沙调度模式：单库主导调度模式、空间尺度水沙匹配模式和干流水库联合调度模式。根据这三种模型进行了10次水沙调度，使下游800 km河道的主河槽平均下降1.5 m，通过能力由1800 m3/s提高到4000 m3/s。此外，河口三角洲湿地生态系统也得到明显改善和恢复。
Water-sediment regulation of the Yellow River is to regulate and control the flow and sediment transport relationship of the lower reaches through reservoirs on the main streams and tributaries to create balance between water and sediment so that sediment transport capacity of the downstream channels can be maximized, shrinking of channels be contained, and medium flood channel be restored and maintained. Many years’ research by the Yellow River Conservancy Commission (YRCC) reveals the water and sediment transport relationship that will prevent sedimentation at the downstream river channels. Based on this relationship and coming sediment and water conditions in the Yellow River basin, the YRCC, with maximized use of reservoirs on the main streams and tributaries, has developed three models of water-sediment regulation: single Xiaolangdi Reservoir-dominated regulation, space scale water-sediment match, and mainstream reservoirs joint operation. Ten water-sediment regulations based on these three models have resulted in an average drop of 1.5 m in the main channel of the downstream 800 km river and an increase of carrying capacity from 1800 to 4000 m3/s. Besides, the wetland ecosystems of estuarine delta has also been improved and restored significantly.