我国北方四大盐海区卤水蒸发计算及其分布

THE ESTIMATION AND THE DISTRIBUTION PERFECTS OF THE EVAPORATION OF BRINE IN THE FOUR BIG SEA-SALT AREAS IN THE NORTHERN CHINA

分析不同浓度卤水和淡水的蒸发值(实测)与卤水浓度、空气相对湿度之间的关系,推导出卤水比蒸发实验式,计算了北方四大海盐区55个气象站年、月淡水和不同浓度卤水蒸发值,绘制年蒸发分布图。

The experimental formula of ratio evaporation has been derived according to the measured evaporation data of fresh water and brine with various density under the natural conditions and the relations between the density and relative moisture of air. We developed the experimental formula of brine evaporation by using the ratio evaporation formula and the data of fresh water evaporation.We calculated the evaporation values of fresh wated and brine of fifty five meteorological stations in the four big sea-salt areas and mapped out the annual evaporation distribution.1, There exists an elementary spatial annual evaporation distribution of brine with different density. For example, annual mean evaporation of brine with 24°(Be/) of the areas is 500-700 mm, its distribution perfects are that the value of the coast of Shandong Peninsula is more than the that of Liao-dong Peninsula and the maximum is distibutcd in Xianjing city , the coast of Changzhou and the north of Shandong Peninsula and the minimum is in the sovthern coast north of Tiangshu.2. There exists an elementary annual distribution of evaporation of brine with different density. The evaporation in summer accounts for 32.6% ouer annual evaporation, in spring 31.8%. in autumn 23.2% and in winter12.1%.3. The magnitude of annual variation of brine evaporation will decrease as the density of brine increases. Its spatial distribution. taken 15°( Be') as an example, is that annual mean magnitude is 55-110mm and the maximum is located in the coast of Changzhou and the minimum in the coast morth of Tiangshu.