摘要
采用E601型蒸发量数据,对不同型号蒸发皿蒸发量进行折算,系统的研究了甘肃省内陆河、黄河、长江流域水面蒸发的特点及其变化规律。结果表明:代表站连续最大3个月水面蒸发量占年值的40%左右,连续最小3个月水面蒸发量占年值的比例在15%以下,最大月水面蒸发量是最小月的3~11倍不等;水面蒸发量内陆河流域呈减少趋势,黄河流域呈减少趋势,长江流域呈增加趋势;据资料计算,甘肃全省多年平均水面蒸发量为1 250.8mm,其中内陆河流域1 526.6 mm,黄河流域898.7 mm,长江流域802.3 mm。水面蒸发量的分布规律为:高山区小,并且从区域上由南向北递增,水面蒸发量与测站高程有明显的关系,在海拔3 100 m以下时,平均每升高百米,蒸发量递减56 mm。
In this paper,E601 evaporative capacity data are used to convert the evaporative capacity of different types of evaporating dishes,and the characteristics and variation rules of water surface evaporation in inland rivers,Yellow River and Yangtze river basins in Gansu province are systematically studied. The results show that: The annual evaporation capacity of the representative station for the maximum 3 months is about 40 % of the annual value,the proportion of the annual water surface evaporation capacity of the continuous minimum 3 months is below 15 %,and the maximum monthly water surface evaporation capacity is 3 to 11 times the minimum month;The evaporation of the inland river basin showed a decreasing trend,the Yellow River basin showed a decreasing trend,and the Yangtze River basin showed an increasing trend. According to data calculation,the average annual water evaporation capacity of Gansu province is 1 250. 8 mm,among which the inland river basin is 1526. 6 mm,the Yellow River basin is 898. 7 mm,and the Yangtze river basin is 802. 3 mm. The distribution of evaporation on water surface is as follows: The high mountain area is small,and is gradually increased from the south to the north,and the evaporation of the water surface is obviously related to the elevation of the station. When the elevation is less than 3100 m,the average annual increase is 100 meters,and the evaporation capacity is decreased by 56 mm.
作者
李文燕
冯小燕
LI Wen-yan;FENG Xiao-yan(Gansu Hydrological and Water Resources Bureau,Lanzhou 730000,Gansu)
出处
《地下水》
2020年第5期184-186,230,共4页
Ground water
基金
全国第三次水资源调查评价项目(水规计(2017)139)。
关键词
黄河流域
内陆河流域
长江流域
水面蒸发量
The Yellow River basin
Inland river basin
Yangtze river basin
water surface evaporation
