毛乌素沙地土壤水分的遥感监测  

Remote sensing monitoring of soil moisture in the Mu Us sandland

作　　者：周会珍[1,2] 刘绍民[1] 白洁[1] 毛德发[3] 

机构地区：[1]北京师范大学遥感科学国家重点实验室,地理学与遥感科学学院,北京100875 [2]北京宇视蓝图信息技术有限公司,北京100096 [3]北京水利水电技术中心,北京100073

出　　处：《农业工程学报》2008年第10期134-140,共7页Transactions of the Chinese Society of Agricultural Engineering

基　　金：国家重点基础研究发展规划项(2007CB714401);国家高技术研究发展计划课题(2007AA12Z175);公益性行业(气象)科研专项(GYHY200706046);国家自然科学基金项目(40671128)

摘　　要：利用毛乌素沙地腹地——乌审旗1982-1993年间的AVHRR遥感数据、常规气象数据和土壤水分观测资料,建立基于条件温度植被指数的0～50 cm土壤水分遥感估算模型,并计算出0～50 cm土体各层土壤水分。结果表明:乌审旗多年平均土壤水分的变化量约为-3.47mm,逐年土壤水分变化量Δw在-118～82 mm之间。乌审旗土壤水分的年际变化不大,基本在±50 mm之间变动。除1986、1987、1991以及1993年外,其余年份乌审旗土壤水分变化量Δw都为正。乌审旗土壤水分的年内波动也不大,基本在±10 mm之间。通过误差分析可知,遥感反演土壤水分的平均绝对百分比误差为14.77%,均方差为77.54 mm。基于条件温度植被指数的土壤水分遥感估算模型是可行的。Based on NOAA-AVHRR, meteorology and soil moisture data during 1982-1993 in Wushen County of the Mu Us sandland, the satellite-derived estimation model of soil moisture was established by using VTCI （vegetation temperature condition index）, and the soil moisture of each layer between 0-50 cm were estimated. The results show that the multi-annual mean soil moisture variation A w is -3.47 mm. The annual soil moisture variations （△ w） are between -118 mm and 82 mm from 1982 to 1993, and the inter-annual changes of soil moisture △ w are between ±50 mm, which was positive except for the year of 1986, 1987, 1991 and 1993. The inner-annual changes of soil moisture A w are between ±10 mm. Compared with ground measurements, the RMSD and MAPD of soil moisture are 14.77% and 77.54 mm respectively. As a result, the satellite-derived estimation model of soil moisture is feasible.

关 键 词：土壤水分 遥感监测 条件温度植被指数 

分 类 号：S152.7[农业科学—土壤学] TP79[农业科学—农业基础科学]