不同洪量对洪家渡水库水温分层结构影响分析

张鹏飞

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中国农村水利水电 ›› 2019 ›› (12) : 75-79.
水环境与水生态

不同洪量对洪家渡水库水温分层结构影响分析

  • 张鹏飞
作者信息 +

An Analysis of the Influence of Different Flood Volumes on the Water Temperature and Layered Structure of Hongjiadu Reservoir

  • ZHANG Peng-fei
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稿件信息 +

摘要

库区坝前水温分布对库区水生态环境以及水生生物的生长有着重要影响,为探讨不同洪量下洪家渡水库水温分层结构,本文通过EFDC模型建立了洪家渡水库水温模型,准确模拟了库区坝前断面水温分布情况,并对三天洪量、五天洪量、七天洪量下库表与水库深度为5m、20m、40m、80m的温差进行了分析,结果表明:洪家渡水库7月、10月坝前断面出现明显的水温分层现象,随水深的增加水温逐渐降低,且上层水体温度变幅大,下层变幅小;库表与各深度处水体的温差与洪水历时及β值均有关,水库混合程度越好温差越小,历时越长温差越大。EFDC模型能较好的模拟洪家渡坝前水温分层结构,实用性及可靠性较高,研究结构可为洪家渡水库合理调度运行提供科学依据。

Abstract

The water temperature distribution in the reservoir area has an important impact on the water ecological environment and the growth of aquatic organisms. To explore the water temperature stratification structure of Hongjiadu Reservoir under different floods,the water temperature model of Hongjiadu Reservoir is established by EFDC model. The water temperature distribution at the front end of the reservoir dam is analyzed,and the temperature difference between the three-day flood,five-day flood and seven-day flood under the surface of the reservoir and the reservoir depth of 5,20,40 and 80 m is analyzed. The results show that: Hongjiadu Reservoir 7 has an obvious water temperature stratification in the dam front section in October and October. The water temperature gradually decreases with the increase in water depth,and the temperature of the upper water body is large,and that of the lower layer is small. There is a temperature difference between the surface of the reservoir and the water at each depth and the flood duration and β. The values are all related. The better the mixing degree of the reservoir is,the smaller the temperature difference is,and the longer the temperature difference is,the longer the temperature difference is. The EFDC model can better simulate the water temperature stratification structure before the Hongjiadu Dam,and has high practicability and reliability. The research structure can provide a scientific basis for the rational operation of the reservoir.

关键词

洪量 / 水库 / 水温 / EFDC 模型 / 垂向分层

Key words

flood volume / reservoir / water temperature / EFDC model / vertical stratification

基金

国家自然科学基金( 51409269) ; 2016 年河南省科技攻关 项目( 162102110015) 。 

引用本文

导出引用
张鹏飞. 不同洪量对洪家渡水库水温分层结构影响分析[J].中国农村水利水电, 2019(12): 75-79
ZHANG Peng-fei. An Analysis of the Influence of Different Flood Volumes on the Water Temperature and Layered Structure of Hongjiadu Reservoir[J].China Rural Water and Hydropower, 2019(12): 75-79

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