水力发电学报2011，Vol.30Issue(3)：22-26,38,6.
三峡水库对下游重要鱼类产卵期生态水文情势影响研究
Effects of Three Gorges reservoir on the downstream eco-hydrological regimes during the spawning of important fishes
摘要
Abstract
The impoundment of Three Gorges reservoir in the middle Yangtze has changed the river flow regimes and produced great influences on the spawning of fishes downstream the reservoir. In this work, the eco-hydrological regimes during the spawning of Chinese sturgeon and four major Chinese carps were analyzed for the cases before andafter the impoundment by using the measured data of flow, water level, water temperature and sediment at the Yichang hydrological station downstream the reservoir. The results show that the mean annual discharges were decreased by 24.7％ and 24％ during the Chinese sturgeon spawning in October and November, respectively, and the mean annual sediment concentration decreased by 94％ and 97％, while water temperature was slightly increased. Similarly, during the four major Chinese carps spawning in May and June the discharges were decreased by 4. 1％ and 10. 6％ , respectively, and sediment decreased by 95％ , while water temperature was slightly decreased. The reservoir impoundment caused a 10 days delay in the spawning of Chinese sturgeon and four major Chinese carps and a great decrease in the spawning scale.This study provides a reference for protecting the important fishes downstream the Three Gorges reservoir.关键词
三峡水库/生态水文/中华鲟/四大家鱼Key words
the Three Gorges reservoir/ eco-hydrological regimes/ Chinese sturgeon/ four major Chinese carps分类
资源环境引用本文复制引用
郭文献,王鸿翔,徐建新,夏自强..三峡水库对下游重要鱼类产卵期生态水文情势影响研究[J].水力发电学报,2011,30(3):22-26,38,6.基金项目
国家"十一五"水专项资助项目(2008ZX07209-002-04) （2008ZX07209-002-04）
华北水利水电学院高层次人才引进资助项目(200907) （200907）
