新疆罗布泊地区凝结水试验

Experimental Study on the Condensation Water in Lop Nur Region,Xinjiang

采用称重法,在高含盐量的罗布泊北部凹地首次进行了凝结水的野外监测,根据监测数据分析了罗布泊地区凝结水的生成规律。研究结果表明罗布泊存在凝结水;2005年7月、10月、12月3次监测时期里日均凝结水量分别为0.293,0.127,0.275mm;凝结水来源于空气中的水气和深部土壤水分;发生的时间基本在晚上22∶00至次日凌晨8∶00;影响凝结水产生的主要因素为近地面大气温度与地表土壤温度差、空气相对湿度、冻结期等,土壤的高含盐量也有利于凝结水的生成。

Condensation water is one of important water sources in arid and semiarid regions, which has a special effect on ecology and hydrology. Field monitor of condensation water was carried out for the first time in north Lop Nut Region of Xinjiang with weighing method. Based on the monitoring data, the analysis is made of the condensation water formation rule in this area. The results indicate that： （1） condensation water exists in Lop Nur Region; （2） the amount of condensation water formed per day is 0. 293 mm, O. 127 mm and 0. 275 mm respectively in July, October and December; （3） the condensation water origi- nates form vapor of air and soil water; （4） formation time of condensation water is from night 22：00 to 8：00 of the next day; （5） the factors which affect the formation of condensation water include difference of air temperature near surface and surface soil temperature, the air relative humidity, icy period, etc. ; （6） the high salt content in soil benefits the formation of condensation water.