大石峡水库泥沙淤积特性与回水分析  

Sedimentation Characteristics and Backwater Analysis of Dashixia Reservoir

作　　者：杜志水[1] 许慧[2] 吴腾[3] 尚倩倩[2] DU Zhishui;XU Hui;WU Teng;SHANG Qianqian(PowerChina Northwest Engineering Corporation Limited,Xi'an710065,China;Nanjing Hydraulic Research Institute,Nanjing210024,China;Hohai University,Nanjing210098,China)

机构地区：[1]中国电建集团西北勘测设计研究院有限公司,西安710065 [2]南京水利科学研究院,南京210024 [3]河海大学,南京210098

出　　处：《西北水电》2019年第5期18-21,共4页Northwest Hydropower

摘　　要：大石峡水库来沙量大,水库运行过程中泥沙淤积问题严峻,泥沙的淤积将影响水库的回水距离。文章采用水沙数学模型研究大石峡水库调度运行过程中排沙特性与回水问题。研究结果表明:库区泥沙总体上呈三角洲淤积,随着水库运行年限的增长,有效库容逐年减小。水库运行50年后,正常蓄水位下的剩余库容为7.859亿m3,多年累积排沙比为39.9%;回水末端下距坝址36km,上距国界线1.08km,满足水库回水末端距国界线1km的控制条件,设计阶段的水库运行方式基本可行。Large amount of sand exists in the inflow of the Dashixia Reservoir,and the sedimentation during the operation of the reservoir becomes a severe problem.The siltation of the sediment will affect the backwater distance of the reservoir.This paper adopts the mathematical model of water and sediment to study the sediment discharge characteristics and backwater problem during the regulation and operation of the Dashixia Reservoir.The results show that the sediment in the reservoir area is generally in delta deposition.With the increase of the operating period of the reservoir,the effective storage capacity decreases year by year.After 50 years of operation,the remaining storage capacity under the normal water storage level is 7.859 million m 3,and the long period cumulative sediment discharge ratio is 39.9%.The downstream of the return water is 36 km from the dam site and 1.08 km from the national boundary line which meet the control condition of 1 km from the national boundary line.Therefore,the operation mode of the reservoir in the design stage is feasible.

关 键 词：水库运行 泥沙淤积 一维数学模型 回水距离 

分 类 号：TV145[水利工程—水力学及河流动力学]