统计资料结果表明，水面蒸发量呈明显减少趋势。
The statistic shows the amount of evaporation on surface water is decreasing.
引起洱海水面蒸发量逐步减少的主要原因是总云量呈增多趋势。
The main reason causing the decrease of evaporation from Erhai Lake is the increase of total cloud cover.
5干热河谷典型的干热气候致使自由水面蒸发量是饱和土壤蒸发量3.35倍。
The amount of the water surface evaporation was approximately 3.35 times that of the saturated soil evaporation.
水面蒸发量为裸地最大，混交林及灌木林能有效减少水面蒸发，减少量较对照裸地可达50.54%和55.20%。
Compared with the bare land, the mixed forest and manual shrubbery can reduce evaporation from water surface 50.54% and 55.20%, respectively.
我国水面蒸发量观测仪器类型很多，通过不断改进，1988年规范规定E- 601型蒸发器为水面蒸发测量的标准仪器。
Through successive improvement, the E-601 type of evaporimeter was stipulated as a standard measuring instrument in China for water-surface evaporation capacity in 1988.
我国水面蒸发量观测仪器类型很多，通过不断改进，1988年规范规定E- 601型蒸发器为水面蒸发测量的标准仪器。
Through successive improvement, the E-601 type of evaporimeter was stipulated as a standard measuring instrument in China for water-surface evaporation capacity in 1988.
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