科尔沁沙地坨甸相间地区土壤冻融过程及土壤含水量分布  

The Dynamics of Soil Moisture Distribution and Thawing-freezing process of Different Typical Landforms in Dune Alternated with Meadow Area in Horqin Sand

作　　者：暴路敏[1] 刘小燕[1] 刘廷玺[1] 于炜[1] 王力[1] 

机构地区：[1]内蒙古农业大学水利与土木建筑工程学院,呼和浩特010018

出　　处：《中国农村水利水电》2014年第11期77-81,85,共6页China Rural Water and Hydropower

基　　金：国家自然科学基金项目(51169012);国家自然科学基金重点与地区资助项目(51139002;51369016);教育部创新团队发展计划(IRT13069);内蒙古自治区草原英才产业创新创业人才团队;内蒙古农业大学寒旱区水资源利用创新团队项目(NDTD2010-6)

摘　　要：利用土壤剖面的温度、湿度观测数据,结合气象资料初步分析了2008-2009年科尔沁沙地坨甸相间不同典型地貌下土壤冻融过程和土壤含水量分布。结果表明：科尔沁沙地沙坨地完全冻结天数为149d,最大冻结深度为160.3cm;草甸地完全冻结天数为186d,最大冻结深度为116.8cm。整个冻融过程中,浅层土壤（0~50cm）受冻融期气温波动影响显著,土壤剖面含水量的变化发生在各时期冻深附近范围内,且主要发生在冻结锋面以下的附近土层内。草甸地的土壤温度随气温的变化比沙坨地缓和,含水率变化幅度比沙坨地大。The dynamics of soil moisture distribution and thawing-freezing process of different typical landforms in dunes alternated with Meadow Area in Horqin Sand（2008-2009） were analyzed with the measurement of temperature and moisture in the soil profile combined with the meteorological data .The results show that there is a completely frozen period about 149 d in sand land and its maximum frozen depth was 160 .3 cm .There is a completely frozen period about 186 d in duration of meadow land and its maximum frozen depth was 116 .8cm .During the whole of thawing-freezing process ,shallow soil （0 ~ 50 cm）significantly affected by the thaw- freezing temperature fluctuations ,the soil moisture changed around the frozen layer ,and occurred mainly in the soil layer under the frozen frontal .Soil temperature in the duration of meadow land as temperature changed was gently for that of the sand land and the moisture content variations was bigger than that of sand land .

关 键 词：冻融过程 土壤含水量 沙坨地 草甸地 

分 类 号：P152.7[天文地球—天文学]