关键词: 地下水蒸渗量, 地中蒸渗计, 瞬时剖面法, 误差分析

Abstract: In the areas with high precipitation and low temperature, zero flux plane method is not fit for calculation of groundwater evapotranspiration and infiltration. To resolve this problem, a suit one should be selected. First of all, several methods to calculate groundwater evapotranspiration and infiltration are introduced such as zero flux plane method, instant profile method, orientated flux method and Penman equation, et al. and its principals, calculation expressions, the applying conditions and the effects of these methods. By the primary analysis of observation of lysimeter, the methods above mentioned are used for calculation and error analysis of groundwater evapotranspiration and infiltration. The results showed that the method to calculate the groundwater evapotranspiration and infiltration should be selected according to the local natural conditions, lithologic characters and groundwater tables. The selected method directly affects the precision in calculation. In addition, the calculating limit and the accuracy of the tensiometer are important factors that result in calculating errors.

Key words: Groundwater evapotranspiration and infiltration, Lysimeter, Instant profile method, Error analysis