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为了确定野外试验场场址由地表向地下土壤渗入的水量 ,必须计算场址的地表蒸发量。在野外试验场安装了环境气象自动监测装置 ,每 10分钟自动记录一次监测数据 ,观测历时二年多。将所获取的气象数据和有关参数用 Penman法、能量平衡法、迭代法和湍流相关法四种方法计算了土壤蒸发量 ,计算结果表明 ,试验场址的土壤年蒸发量与降水量基本一致 ,在 4 0 0～ 6 0 0 mm/ a之间。
In order to determine the amount of water infiltrated into the subsurface soil from the site of a field test site, the site’s surface evaporation must be calculated. In the field test site to install automatic environmental meteorological monitoring device, automatic monitoring data recorded every 10 minutes, the observation lasted more than two years. Soil evaporation was calculated by Penman method, energy balance method, iterative method and turbulence correlation method. The calculated results show that the annual soil evaporation at the experimental site is basically consistent with the precipitation, Between 400 ~ 600 mm / a.