水力发电学报2012，Vol.31Issue(4)：54-59,93,7.
水热同步性对流域水热耦合平衡的影响
Seasonality of precipitation and potential evaporation and its impact on catchment water-energy balance
摘要
Abstract
Through an analysis on hydrologic and climatic data from 108 catchments in north China by a water-energy balance method, this study found that catchment evaporation depends not only on the amounts of precipitation and potential evaporation, but also on the seasonalily difference between seasonal precipitation and potential evaporation. To parameterize seasonality, climate seasonality index （S） is introduced in this paper, and correlation analysis shows that this index is an important factor in determining actual evaporation. Therefore, we put forth an empirical equation to include its effect in estimation of the parameters of waterenergy balance equation, which improves the estimation of actual evaporation. This study also found that during the past 40 years the index S took a trend of significant variation, and it caused a change of 20% or more in the actual evaporation over 20% of the 108 catchments.关键词
水文学/水热耦合平衡/相关性分析/气候季节性/蒸发Key words
hydrology/water-energy balance/correlation analysis/climate seasonality/evaporation分类
建筑与水利引用本文复制引用
杨汉波,吕华芳,杨大文,胡庆芳..水热同步性对流域水热耦合平衡的影响[J].水力发电学报,2012,31(4):54-59,93,7.基金项目
国家自然科学基金项目（50909051,50939004）,科技部创新方法工作专项项目 （）
