论文部分内容阅读
利用水分分配箱对流动沙地土面蒸发量和入渗补给量的月动态特征及其水量平衡作了定量研究。结果表明:①生长季流动沙地土面蒸发量从4月开始逐渐增大,至8月达到蒸发的最高点,9月蒸发量开始回落;5月、6月受气温的影响蒸发量相对较小,只占到同期降水量的30%~40%,有利于土壤储存更多的水分;生长季总蒸发量为167.42 mm,占同期降水量的76.07%,远小于固定沙地小叶锦鸡儿灌丛蒸散量占同期降水量的135.83%的比值。②补给量从4月开始逐渐增大,8月达到最大值16.79 mm,进入9月,随着降水量的减少以及8月较大的蒸发消耗,补给量迅速减少。补给系数从5月至8月逐渐增大,最大值可达到26.73%,平均值为15.09%。
Using the moisture distribution box, the monthly dynamic characteristics and the water balance of the evaporation and infiltration of floating sandy soil were quantitatively studied. The results showed that: (1) During the growing season, the soil evaporation of mobile sandy land increased gradually from April until it reached the highest point of evaporation in August, and the evaporation in September began to drop. In May and June, the evaporation affected by air temperature was relatively Small, accounting for only 30% to 40% of the precipitation over the same period, is conducive to storing more soil moisture; total evaporation during the growing season was 167.42 mm, accounting for 76.07% of precipitation over the same period, much smaller than the fixed sandy leaf Caragana microphylla Evapotranspiration accounted for 135.83% of precipitation over the same period the ratio. ② The amount of recharge increased gradually from April to August, reaching a maximum of 16.79 mm. In September, with the decrease of precipitation and the larger evaporation consumption in August, the recharge decreased rapidly. Supply coefficient gradually increased from May to August, the maximum value can reach 26.73%, with an average of 15.09%.