溪洛渡水库分层取水对向家坝库区水温的影响分析
Analysis of Effect of Stratified Water Withdrawal in Xiluodu Reservoir on Water Temperature in Xiangjiaba Reservoir Area
任玉峰 1胡光洋 2杨中华 2梁志明 1刘新波 1马一鸣 1白凤朋3
作者信息
- 1. 中国长江电力股份有限公司,湖北 宜昌 443000;智慧长江与水电科学湖北省重点实验室,湖北 宜昌 443000
- 2. 武汉大学水资源工程与调度全国重点实验室,湖北 武汉 430072
- 3. 长江水资源保护科学研究所,湖北 武汉 430051;长江水利委员会湖库水源地面源污染生态调控重点实验室, 湖北 武汉 430051
- 折叠
摘要
为了探究上游溪洛渡水库分层取水对下游向家坝库区水温的影响,基于历史水文数据,分析向家坝建库对河道水温的影响,结合率定好的CE-QUAL-W2 模型,设置溪洛渡水库分层取水与不分层取水两种计算工况,分析 2019 年溪洛渡水库分层取水对下游向家坝库区水温变化过程的影响.结果表明,向家坝水库蓄水后使坝下河道水温达到 18℃的时间滞后 50 d,向家坝坝下河道水温受支流水温影响较大;2019 年上游溪洛渡水库分层取水在 4～5 月最高可使下游向家坝库区表层水温升高 1.0℃,其影响沿程逐渐减弱,至绥江县城完全消失;分层取水使下游向家坝库区 4～5 月水温结构明显改变,4～5 月下泄水温明显提高,最大可提高0.48℃.研究结果可提高对叠梁门分层取水效果的认识,并为后续生态调度提供科学依据.
Abstract
In order to investigate the influence of stratified water withdrawal in the Xiluodu reservoir on downstream water temperature in the Xiangjiaba reservoir area,historical hydrological data was used to explore the impact of the Xiangjiaba construction on river water temperature.By integrating the calibrated CE-QUAL-W2 model,this study ana-lyzed the effects of stratified water withdrawal in 2019 on the variations of water temperature in the downstream Xiangjia-ba reservoir area.The results show that the Xiangjiaba reservoir caused a 50-day delay in reaching 18℃,and the water temperature in the downstream reach of the Xiangjiaba was greatly influenced by the temperature of tributary inflows.Stratified water withdrawal in 2019 resulted in a maximum surface water temperature increase of 1.0℃ in the Xiangjiaba reservoir area during April and May.However,this influence gradually diminished along the downstream,completely disappearing in the Suijiang County.The stratified water withdrawal significantly altered the water temperature structure in the downstream Xiangjiaba reservoir area during April and May,with a noticeable increase in the outflow temperature,reaching a maximum of 0.48℃.These findings contribute to a better understanding of the effects of stratified water withdrawal and provide a scientific basis for subsequent ecological scheduling.
关键词
向家坝水库/CE-QUAL-W2/分层取水/水温Key words
Xiangjiaba Reservoir/CE-QUAL-W2/stratified water withdrawal/water temperature引用本文复制引用
基金项目
国家重点研发计划(2021YFC3200304)
湖北省自然科学基金联合基金(2022CFD169)
水利部水工程建设与安全重点实验室开放研究项目(202208)
出版年
2024
NETL
NSTL
维普
万方数据