西北水电Issue(4)：28-34,7.DOI:10.3969/j.issn.1006-2610.2026.04.004
丹江口水库水陆水面蒸发特征及其差异性研究
Study on Water Surface Evaporation Characteristics and Differences over Land and Water Areas of Danjiangkou Reservoir
摘要
Abstract
Danjiangkou Reservoir serves as the core water source of the Middle Route of the South-to-North Water Diversion Project.After the dam heightening and impoundment,the water area of the reservoir expanded.To investigate the water surface evaporation characteristics of Danjiangkou Reservoir,deepen the understanding of regional evaporation properties and improve the estimation accuracy of reservoir evapo-ration,measured evaporation data from floating evaporation pan and land-based evaporation pan at the evaporation station of Danjiangkou Reservoir during 2017-2024 were collected to analyze the differences in evaporation characteristics between water and land surfaces as well as their influencing factors.The results show that the annual average evaporation of the floating pan and land-based pan at the Danjiangkou Reservoir Evaporation Station are 1 146.4 mm and 1 044.3 mm,respectively.The multi-year average monthly evaporation peaks in August for both pans,while the monthly evaporation troughs occur in February for the floating pan and January for the land-based pan.Water tempera-ture,saturated vapor pressure,air temperature,and vapor pressure deficit all have significant correlations with water and land evaporation,with Pearson correlation coefficients exceeding 0.5.The monthly conversion coefficient between land and floating pan evaporation ranges from 0.79 to1.70.From March to July,land-based evaporation is higher than floating pan evaporation,dominated by air temperature and saturat-ed vapor pressure.From August to the following February,floating pan evaporation exceeds land-based evaporation,mainly controlled by wa-ter-air temperature difference,water temperature and saturated vapor pressure.The research findings can provide technical support for the es-timation of water surface evaporation and the derivation of evaporation calculation formulas for Danjiangkou Reservoir.关键词
水面蒸发/漂浮蒸发/陆面蒸发/水陆蒸发差异性,丹江口水库Key words
water surface evaporation/floating pan evaporation/land pan evaporation/differences between floating and land pan evapora-tion/Danjiangkou Reservoir分类
建筑与水利引用本文复制引用
张成孝,冉中鑫,臧力永..丹江口水库水陆水面蒸发特征及其差异性研究[J].西北水电,2026,(4):28-34,7.基金项目
长江水利委员会水文局科技创新基金项目(SWJ-25CJX16) （SWJ-25CJX16）
