三峡水库蓄水前后下泄水温变化及其影响研究

在分析了影响水库温度的各种影响因素和结合三峡枢纽的调度情况的基础上,对三峡水库蓄水前后实测水温资料进行了分析.三峡水库在围堰发电期下泄水温过程规律发生了一定的变化,下泄水温在不同时期分别出现"滞温"和"滞冷"现象.并进一步分析了下泄水温变化对下游河流生态的影响和范围,基于此而提出了三峡水库生态调度必需把下泄水温过程最大程度地与天然过程相接近作为水库生态调度的原则,从而为下游流域生态系统健康发展创造有利条件.

Research on water temperature variation of TGP reservoir before and after impoundment and its influence

Observed temperature data of water released from the Three Gorges reservoir before and after the reservoir filling were analyzed on the basis of analyzing variation factors affecting the reservoir water temperature and in combination with the condition for the reservoir regulation.During the period of power generation with water retained by the cofferdam,some changes of the temperature processes of water released from the reservoir took place,resulting in temperature retarding phenomena.The influence of released water's temperature variation on the downstream river ecology and the influence scope were further analyzed,and on this basis,the Three Gorges reservoir's ecologic regulation principle was put forward,that was,the temperature process of water released from the reservoir should be possibly close to the natural process in order to create favourable conditions for the healthy development of the downstream ecologic system.