水温自动观测系统在梯级电站水温影响研究中的应用

Application of automatic water temperature observation system to study on impact of cascade hydropower station on water temperature

水温是水电开发影响的一个重要环境因子,科学评价梯级电站开发对水温的影响需全面了解各梯级水库及下游水温变化。由于常规水文站点空间分布的局限性,利用水文站水温数据往往不能满足水温影响评价要求,补充现场水温观测是获取水温数据的主要途径之一。本文以沅水流域梯级电站水温影响研究为例,分析了流域水温在线自动观测的效果,并对开展流域水温长期在线观测提出了建议。

Water temperature is an important environmental factor of the impact from the hydropower development, thus the changes of the water temperatures and their downstream water temperatures of all the cascade reservoirs are necessary to be fully obtained for the scientific evaluation on the impact from the development of cascade hydropower station on water temperature. Be- cause of the limitation of the spatial distribution of the conventional hydrological stations, the utilization of the water temperature data from the hydrological station often can not meet the requirement for the evaluation of the impact on water temperature, and then one of the main ways for obtaining the water temperature data is to make an additional in situ water temperature observation. By taking the study on the impact from the cascade hydropower stations of Yuan River Basin on water temperature as a case, the effect of the on-line automatic water observation system for the river basin is analyzed herein, and moreover, some suggestions on the long term on-line observation of water temperature in the river basin are put forward as well.