中文摘要：

为了定量研究土壤盐分对土壤蒸发的影响,测定了土壤盐分质量分数在0.2%、0.6%、1.0%和5.0%等4个水平下的水分特征曲线,进行了不同含盐量下的土柱蒸发试验;并考虑盐分对水分特征曲线的影响,采用修改的HYDRUS-1D程序对蒸发规律进行了模拟。结果表明,1不同含盐量下土壤的水分特征曲线不同,且在含水率低于30%时,盐分对水分特征曲线的影响显著;2不同含盐量下土壤的蒸发速率不同,随着土壤土壤含盐量的增加,土壤蒸发速率显著降低;3考虑剖面盐分动态变化对水分特征曲线的影响,修改后的HYDRUS-1D程序能更好地模拟土壤蒸发过程。

英文摘要：

To qualify the effect of salinity on soil evaporation, the soil water characteristic curves at soil salt contents of 0.2 %, 0.6 %, 1.0% and 5.0 % were measured respectively, and soil evaporation experiments with different salt contents by using soil columns were performed. A modified HYDRUS - 1D program was used to simulate the evaporation process with considering the effect of salinity on soil water characteristic curve. The results showed that. （1）soil at different salt contents had different soil moisture characteristic curve, when the soil water content was lower than 30 %, the effect of soil salt content was significant, and the lower soil water content was, the greater effect of the salt content was; （2）Soil at different salt contents had different soil evaporation rate, and with the increasing of the salt content, the evaporation rate decreased significantly; （3）When the effect of salinity on soil water characteristic curve was considered, the simulation results better fitted with the measured values.