高坝库区和变动回水区设计最低通航水位的确定  

Determination of lowest navigable water level design in high dam reservoir areas and fluctuating backwater areas

作　　者：陈婷婷 周玉洁 赵江 于丽伟 CHEN Ting-ting;ZHOU Yu-jie;ZHAO Jiang;YU Li-wei(Sichuan Communication Surveying&Design Institute Co.,Ltd.,Chengdu 610017,China)

机构地区：[1]四川省交通勘察设计研究院有限公司,四川成都610017

出　　处：《水运工程》2023年第S01期80-84,共5页Port & Waterway Engineering

摘　　要：传统的库区设计最低通航水位的计算方法主要对流量进行统计,按保证率计算入库流量与坝前水位相组合,但该方法没有考虑电站的调度方案。以金沙江向家坝库区为例,针对向家坝电站的调度方案不同,高坝库区坝前水位差较大,统一用保证率流量和坝前水位组合方案不符合实际情况,进行设计最低通航水位的研究。以实际坝前水位和流量的组合为依据,通过4种方法推求高坝库区及变动回水区设计最低通航水位,并进行对比。结果表明,考虑向家坝坝前水位与入库流量的组合可以更好地确定变动回水区的工程规模,符合实际情况,达到节约成本的目的。Traditional calculation methods for designing the lowest navigable water level in reservoir areas mainly count discharge and calculate the inflow discharge according to guaranteed rate and water level in front of dams. However, these methods fail to consider the dispatching scheme of power stations. Taking Xiangjiaba Reservoir area in Jinsha River as an example, this paper analyzes problems that Xiangjiaba power station has different dispatching schemes, the water level difference in front of dams of high dam reservoir areas is large, and schemes using both guaranteed rate discharge and water level in front of dams are not suitable for the actual situation. Then, the paper studies the lowest navigable water level design. Based on the actual water level and discharge in front of dams, the paper calculates the lowest navigable water level in high dam reservoir areas and fluctuating backwater areas by four methods and compares the calculation results. The results show that the project scale in fluctuating backwater areas can be better determined by considering both water level and inflow discharge in Xiangjiaba Reservoir area, which is in line with the actual situation and can reduce cost.

关 键 词：设计最低通航水位 保证率 调度方案 高坝库区 

分 类 号：U612.3[交通运输工程—船舶及航道工程]