古尔班通古特沙漠南缘融雪水土壤入渗量  

Soil infiltration of snowmelt water in the southern Gurbantunggut Desert,Xinjiang,China

作　　者：胡顺军[1] 陈永宝[1,2,3] 朱海[1,2] 

机构地区：[1]中国科学院新疆生态与地理研究所荒漠与绿洲生态国家重点实验室,乌鲁木齐830011 [2]中国科学院大学,北京100049 [3]湖北煤炭地质一二五队,湖北宜昌443000

出　　处：《应用生态学报》2015年第4期1007-1015,共9页Chinese Journal of Applied Ecology

基　　金：国家重点基础研究发展计划项目(2013CB429902);国家自然科学基金-新疆联合基金面上项目(U1303181)资助

摘　　要：融雪水土壤入渗量是干旱区沙漠重要的水平衡收入项.2012—2013、2013—2014年两个冬季对古尔班通古特沙漠南缘沙丘西坡、东坡和丘间地降雪前和融雪后的土壤含水率进行监测,根据水量平衡原理计算了沙丘西坡、东坡、丘间地和景观尺度上的融雪水土壤入渗量,并与采用筒测法的实测结果进行比较.结果表明：降雪前土壤含水率较低,未冻层非饱和土壤水对地表冻结层土壤水分的补给可忽略不计;融雪入渗水是表层土壤获得补给的主要水源;冻结期潜水既没有蒸发,积雪融化后潜水也没有获得补给;研究区西坡、东坡、丘间地和景观尺度上的融雪水土壤入渗量分别为20~43、27~43、32~45和26~45 mm.Soil infiltration of snow-melt water is an important income item of water balance in arid desert. The soil water content in west slope, east slope and interdune of sand dune in the southern Gurbantunggut Desert was monitored before snowfall and after snow melting during the winters of 2012-2013 and 2013-2014. According to the principle of water balance, soil infiltration of snow- melt in the west slope, east slope, interdune and landscape scale was calculated, and compared with the results measured by cylinder method. The results showed that the soil moisture recharge from unfrozen layer of unsaturated soil to surface frozen soil was negligible because the soil moisture content before snowfall was lower, soil infiltration of snow-meh water was the main source of soil water of shallow soil, phreatic water did not evaporate during freezing period, and did not get re- charge after the snow melting. Snowmelt water in the west slope, east slope, interdune and land- scape scale were 20-43, 27-43, 32-45, 26-45 ram, respectivelv.

关 键 词：融雪水 入渗 水量平衡 筒测法 

分 类 号：S152.7[农业科学—土壤学]