中文摘要：

潜水蒸发是浅层地下水向土壤水和大气水转化的重要途径,也是地下水的主要消耗项。根据惠北试验站2003—2008年实测的逐日潜水蒸发资料,分析了气象因素、作物因素、土壤因素、地下水埋深以及降雨量对潜水蒸发强度的影响规律。利用叶水庭指数模型建立了不同时段的潜水蒸发计算模型,并进行了验证,分析了日指数模型计算结果偏大的原因。基于潜水蒸发影响规律,建立了新的潜水蒸发计算模型,并进行了推导和验证,结果表明,改进后的模型计算精度有了很大提高。

英文摘要：

Phreatic evaporation is the main transform way from groundwater to soil water and meteoric water.It is also the main expenditure of ground water.According to the daily observed phreatic evaporation data from 2003 to 2008 in Huibei Experiment Station,the effect of meteorological factors,crop factors,soil factors,groundwater depth and rainfall on phreatic evaporation was analyzed.Phreatic evaporation calculation models for different period were established using Yeshuiting Index Model and were verified.The calculation results of the daily index model were too larger,and the reasons were analyzed.Based on the influence law of phreatic evaporation,a new calculation model was established;it was derived and verified,too.The results showed that the calculation accuracy of improved model was increased.