水利学报2017，Vol.48Issue(9)：1030-1038,9.DOI:10.13243/j.cnki.slxb.20170380
分层型水库取水水温量纲分析及其影响因素研究
Dimensional analysis of water temperature withdrawn and influencing factors in thermal stratified reservoir
摘要
Abstract
Thermal stratification,as an important factor affecting the aquatic ecosystem,has becomes research hot topic gradually.Based on the analysis of some influencing factors,such as water temperature gradient,intake head and intake flow,an estimate model of water temperature withdrawn has been developed by using dimensional analysis.Besides of that,multiple regression analysis is performed by using SAS9.3,the quantitative relation between water temperature withdrawn and key factors is given,and show a good correlation with the measured data with a correlation coefficients of 0.956.The results show that water temperature gradient is the major factor affecting water temperature withdrawn,next is the intake head term,and the last is flow term.The water temperature will increase with the gradient in front of the dam increasing.The analyses also show that the bigger the temperature gradient,the more obviously the water temperature withdrawn varied.It is also indicated that the water temperature will decrease with the intake head increasing,and the decrease is much smaller than the increase.Besides of that,with the intake flow increasing,the water temperature withdrawn becomes higher.However,while the intake flow is greater than critical value,the water temperature shows a downward trend.A comparison between the predicted and the measured water temperature withdrawn is in close agreement with a correlation coefficient of 99.4％.The results show that the model may be used to determine water temperature withdrawn with an acceptable accuracy if the variables are within the following ranges.关键词
水温分层/下泄水温/影响因素/估算模型/量纲分析法Key words
thermal stratification/water temperature withdrawn/influencing factor/estimate model/dimensional analysis method分类
建筑与水利引用本文复制引用
郑铁刚,刘之平,孙双科,柳海涛,牛志攀,李广宁..分层型水库取水水温量纲分析及其影响因素研究[J].水利学报,2017,48(9):1030-1038,9.基金项目
国家重点研发计划(2016YFC0401708) （2016YFC0401708）
国家自然科学基金项目(51409181) （51409181）
