小浪底水库1999-2009年泥沙淤积分布特点  

Distribution of deposition in Xiaolangdi Reservoir

作　　者：王婷[1] 陈书奎[1] 马怀宝[1] 张俊华[1] 

机构地区：[1]黄河水利科学研究院水利部黄河泥沙重点实验室,河南郑州450003

出　　处：《泥沙研究》2011年第5期60-66,共7页Journal of Sediment Research

基　　金：水利部公益性行业科研专项小浪底水库蓄水期高效输沙关键技术研究(200801024);小浪底水库淤积形态的优选与调控(200901015)资助

摘　　要：1999年10月至2009年10月,小浪底库区淤积量已达25.831亿m3,干流淤积形态仍为三角洲淤积,支流沟口淤积面随干流同步抬升。从高程分布看,泥沙淤积主要集中在160～235m高程,该区间占淤积总量的96.3%;从干支流分布看,主要集中在干流,占淤积总量的82.2%,支流泥沙淤积在沟口附近,主要为干流异重流倒灌;从淤积时段看,主要发生在汛期。对库区淤积分布特点进行分析,能够为今后库区运用调度方式提供一定的技术依据。By Oct. 2009, the amount of deposition in the Xiaolangdi Reservoir （XLD） reached 2. 5831 billion m3 , and the morphology of stem deposits was still a delta. Along with the rising of deposition surface in the stem, the deposition surface in tributary mouthes rose synchronously. As for vertical distribution, the deposition was mostly concentrated at the elevation from 160 to 235m, and the deposition amount in the same range accouted for 96.3 % of the total. As for distribution in the stem and tributaries,the sediment deposition was mostly concentrated in the stem, accounted for 82.2% of the total; the tributary deposition concentrated in the vicinity of tributary mouthes, and it was induced by inverted penetration of stem density current. As for deposition periods, it was mostly concentrated in flood seasons. Analyzing deposition distribution characteristics can provide a technical base for operation mode of the XLD.

关 键 词：小浪底 淤积形态 淤积分布 

分 类 号：TV145[水利工程—水力学及河流动力学]