摘要
根据随机统计理论分析三峡水库的泥沙运动规律，包括三峡库区的泥沙沉积概率与输移距离，变动回水区泥沙起动概率与起动流速，泥沙推移悬移概率分配与推悬比等。结果表明，2003—2010年三峡库区输沙法悬移质淤积量为11．68亿t，断面法泥沙淤积体积为11．95亿m3，出库悬移质排沙比为26％，对于泥沙沉积均值概率50％，0．006mm的泥沙可以输移出库，对于泥沙沉积概率15．85％，0．8mm的泥沙可以长距离输送，起动流速小的泥沙起动概率大，0．03-10mm的中等粒径泥沙起动流速小于2m／s，随机分析结果和实测资料基本相符。
Based on the theory of stochastic statistics, the movement of sediment in the Three Gorges Reservoir is analyzed, such as probability of sedimentation and distance of sediment transportation, probability of incipi- ent motion and transport rate of bed load, probability distribution of bed load and suspended sediment. The analysis shows that the quantity of suspended sediment deposited in the reservoir was 11.68 x 10^8t, and the volume of sediment deposited was 11.95 x 10^8m3 （in 2013 to 2010）. The ratio of sediment discharged was 26%. The sediment of 0. 006mm can be discharged from the reservoir for 50% of sedimentation probability, and the sediment of 0.8mm can be transported for long distance for 15.85% of sedimentation probability. The results of stochastic analysis are accordant to data of survey.
出处
《泥沙研究》
CSCD
北大核心
2013年第6期6-11,共6页
Journal of Sediment Research
基金
"十二五"国家科技支撑计划课题(2012BAB04B02
2012BAB04B05)
中国水利水电科学研究院科研专项(泥集1340)
关键词
三峡水库
泥沙淤积
输移距离
排沙比
随机分析
Three Gorges Reservoir
sedimentation
distance of sediment transportation
ratio of sedimentdischarged
stochastic analysis
