水道港口2024，Vol.45Issue(2)：206-214,9.
水运枢纽梯级开发对汉江中下游水质时空变化影响分析
Impact of cascade hydropower development on spatial-temporal variation of water quality in the middle and downstream of Hanjiang River
摘要
Abstract
The hydropower development has a certain impact on the river.In order to comprehensively assess the cumulative impact of cascade hydropower development on spatial-temporal variations of water quality in the middle-lower Hanjiang River,the monitoring data of permanganate index(CODMN),total nitrogen(TN),total phosphorus(TP)and ammonia nitrogen(NH3-N)of seven sections of the middle-lower Hanjiang River in recent 5 years were collected.The monitoring data of permanganate index,total phosphorus and ammonia nitrogen of 4 sections in recent 10 years were collected.Based on the analysis of temporal-spatial variations in water quality,the Pearson correlation coefficient and Mann-Kendall mutation test and one-dimensional hydrodynamic model were used to comprehensively analyze the impact of cascade construction on the spatial-temporal variation of water quality and hydrodynamic environment changes in the middle-lower Hanjiang River.The results show that:The construction of the dam site may make the downstream permanganate index increase briefly,and the dam site construction has no significant effect on the total phosphorus concentration of the upstream and downstream sections,but the downstream total phosphorus concentration increases with the construction of the dam site.Ammonia and nitrogen mutation occurred in 2012,the mutation of ammonia and nitrogen in the other sections all occurred after 2015.The time of permanganate index and total phosphorus mutation in the four sections occurred between 2010 and 2015.The correlation coefficient of permanganate index,ammonia,nitrogen and total phosphorus in the Danjiangkou dam and Xiangyang sections upstream of Xinglong dam site is significant,with no obvious correlation between Xiantao section and Jijiazui section.After the construction and operation of Yakou dam,the water level will be increased and the velocity will be decreased.After the completion of the middle and downstream of Hanjiang River,the flow velocity in each reach slightly decreased.关键词
梯级水运枢纽/汉江中下游/水质/累积影响/时空变化Key words
cascade hydropower development/middle-lower Hanjiang River/water quality/cumulative impact/spatial-temporal variation分类
交通工程引用本文复制引用
秦听听,徐鑫,王盈心,王娜,王楠,高清军..水运枢纽梯级开发对汉江中下游水质时空变化影响分析[J].水道港口,2024,45(2):206-214,9.基金项目
交通运输行业重点科技项目(2021-MS5-136) （2021-MS5-136）
湖北省交通运输厅科技项目(2020-186-2-9) （2020-186-2-9）
中央级公益性科研院所基本科研业务费专项基金项目(TKS20210210) （TKS20210210）
