水利学报Issue(6)：710-717,8.
小浪底水库淤积形态探讨
Discussion on deposition morphology of Xiaolangdi Reservoir
摘要
Abstract
By October 2010, the mainstream delta vertex of Xiaolangdi Reservoir had moved up to cross section HH12 which is 18.75km to dam, and the amount of sediment reached 2.823 billion m3. The re⁃sults show that under the same amount of sediment and water storage,compared with cone deposition mor⁃phology, the backwater length of delta deposition morphology is obviously shorter and the water lever be⁃fore dam is obviously lower. The delta deposition morphology is obviously superior to cone deposition mor⁃phology in the aspects of trapping the coarse sand,discharging the fine sand,and reducing deposition and optimizing the process of outlet water and sediment,and so on. The delta deposition morphology is benefi⁃cial to shape density current, and the sediment ejection effect of density current is superior to backwater free flow. Physical model tests of Xiaolangdi Reservoir show that when channel suffers from retrogressive erosion and water level drops, the unconsolidated deposits in saturation state on both bank beaches will lost stability and slump into the channel and the storage capacity may recovery under the combined action of gravity and seepage water pressure. Therefore,in the current process of reservoir operation,retrogressive erosion can be shaped in river reach before dam and delta continent surface by controlling water level of inflow floods,so as to delay the transformation from delta deposition morphology into cone deposition mor⁃phology as long as possible.关键词
小浪底水库/淤积形态/三角洲淤积/锥体淤积/降水冲刷/模型试验Key words
Xiaolangdi Reservoir/deposition morphology/delta deposition morphology/cone deposition morphology/pracipitation washout/model test分类
建筑与水利引用本文复制引用
王婷,张俊华,马怀宝,郜国明..小浪底水库淤积形态探讨[J].水利学报,2013,(6):710-717,8.基金项目
水利部公益性行业科研专项（200901015）；国家自然基金资助项目（51179072）；中央级公益性科研院所基金项目 （）
