河北省水面蒸发特性分析

Water Surface Evaporation Characteristic Analysis of Hebei Province

利用河北省46个水面蒸发站1951年(或建站)-2010年60年的蒸发资料,按不同器皿逐月点绘了折算系数分区图,将全省划分为6个分区,分析了20cm口径蒸发皿与E601型蒸发器水面蒸发折算系数。把不同类型的蒸发器资料均换算成E601型蒸发器资料,从地区分布、时程分配等方面阐述了全省水面蒸发量的特点;蒸发量呈南部大于北部,平原大于山区的地区分布特征;年蒸发量呈下降趋势,年际变化较为明显,20世纪60年代蒸发量最大,减少的变异年份出现在1983年。

The 60-year evaporation data from 46 water surface evaporation stations of Hebei province from 1951 to 2010 are used to analyze the conversion coefficient of evaporation between the 20 cm diameter evaporation pan and the E601 type evaporator. The entire province is divided into six sub-regions, and the monthly conversion coefficients for different types of evaporators are investigated for each sub-region. Then the evaporation data from different types of evaporators are converted into the data for the E601 type evaporator based on the conversion coefficients, which is beneficial to evaluate the evaporation from water surface spatially and temporally in Hebei province. The spatial variation of evaporation indicates a tendency of higher evaporation in the north than the south and a larger evaporation in the plains than the mountains. Furthermore, the yearly evaporation decreases with a significant interWater Surface Evaporation Characteristic Analysis of Hebei Provinceannual variation. The maximum e- vaporation appeared in the 1960 s. After 1983, the evaporation was usually less than the average value.