摘要
对小浪底水库拦沙后期淤积形态对库区输沙的影响进行了分析。结果表明:在同淤积量与同蓄水量条件下,近坝段存在较大库容的三角洲淤积形态,在发挥水库拦粗排细减淤效果及优化出库水沙过程等方面要优于锥体淤积形态;在适当的条件下,应通过控制运用水位降低侵蚀基面,形成自下而上的溯源冲刷,恢复三角洲顶点以下库容,尽可能长期保持三角洲淤积形态。
The paper analyzes the influence of sedimentation shape at later period of debris retaining of the Xiaolangdi Reservoir to the sediment transport of the reservoir area.The outcomes show that a) there is bigger storage capacity in the delta sedimentation shape near the dam section under the conditions of same deposition volume and same storage volume.It is better than that of pyramidal sedimentation shape on the aspects of retaining coarse sand,discharging the fine,reducing sediment and optimizing silt-discharge process of the reservoir outflow;b) it should reduce erosion datum level,form bottom up backscour,get back the storage capacity below the top of delta and try to keep the delta sedimentation shape as long as possible under the proper condition.
出处
《人民黄河》
CAS
北大核心
2010年第10期36-37,共2页
Yellow River
基金
水利部公益性行业科研专项(200901015
200801024)
关键词
水库调度
三角洲淤积
淤积形态
小浪底水库
reservoir regulation
delta sedimentation
sedimentation shape
the Xiaolangdi Reservoir
