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大型水库不同取水方式对下游鱼类生态环境影响研究--以贵州省夹岩水利枢纽工程为例 预览

Study on the Influence of Different Water Intake Methods on Fish Habitat in the Lower Reaches of Large Reservoirs --A Case Study of Jiayan Water Conservancy Project in Guizhou Province
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摘要 大型水库建设使得下泄水体水温发生改变,对下游生态环境产生不利影响。以贵州省夹岩水利枢纽工程为例,运用数值模拟方法,分析工程建设后库区水温垂向分布及其低温水下泄影响。研究结果表明夹岩水库库区垂向水温稳定分层,库区表底层温差随着季节变化明显,表层水温主要取决于光照强度,底层水温较稳定。与单层取水方式相比,分层取水方式能有效提高夏季下泄水体水温,降低下泄水体与天然水体温差,缩短下泄低温水恢复距离,减缓对下游河道特征鱼类生存环境的负面影响。 The construction of large reservoir project has changed the temperature of discharge water, and has negative influence on the ecological environment of lower reaches. This study takes the Jiayan water conservancy project in Guizhou Province as an example, and uses the numerical simulation method to analyze the vertical characteristics of water temperature, and the influence on the discharge of low temperature water after the Jiayan reservoir is built. The research results show that in vertical direction, the temperature of Jiayan reservoir stratify stably. The temperature difference between surface layer and bottom layer changes significantly in different seasons, the surface water temperature mainly depends on sunshine, and the bottom water temperature is relatively stable. Compared with single-level water intake, multi-level water intake can effectually rise the temperature of discharge water in summer, decrease the temperature difference of discharge water and natural water, shorten the recovery distance of low-temperature discharge water, and reduce the negative influence on fish habitat in the lower reaches.
作者 邓伟铸 徐婉明 刘斌 廉浩 DENG Weizhu;XU Wanming;LIU Bin;LIAN Hao(Scientific Institute of Pearl River Water Resources Protection,Guangzhou 510611,China;Academy of Planning and Environment of South China Sea,State Oceanic Administration,Guangzhou 510300,China)
出处 《人民珠江》 2019年第8期57-62,71共7页 Pearl River
关键词 大型水库 低温水 环境 影响 large reservoir low temperature water environment influence
作者简介 邓伟铸,男,主要从事水文水资源方面研究。E-mail:390710076@qq.com;通讯作者:刘斌,男,主要从事水文水资源方面研究。E-mail:11427274@qq.com.
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