基于ASAR数据的2011年四湖地区干旱遥感反演  

Remotely Sensed Inversion of Drought in Four-Lake Region in 2011 Based on ASAR Data

作　　者：由阳阳[1] 陈永宝[2] 金卫斌[1,3] 熊勤学[1] 

机构地区：[1]长江大学长江中游湿地农业教育部工程研究中心,湖北荆州434025 [2]长江大学地球化学系,湖北荆州434025 [3]经济林木种质改良与资源综合利用湖北省重点实验室/黄冈师范学院,湖北黄冈438000

出　　处：《湖北农业科学》2013年第5期1044-1048,共5页Hubei Agricultural Sciences

基　　金：国家自然科学基金项目(40791113)

摘　　要：利用ENVISAT-ASAR GM卫星监测数据,根据其后向散射系数与土壤水分呈明显正相关的特点,反演正常情况和干旱状况下江汉平原四湖地区农田土壤湿度的空间分布。通过正常情况和干旱情况的差异,计算出两个时间土壤水分的减少量,进而得出四湖地区干旱程度的空间分布。通过比较荆州气象局发布的干旱指数空间分布和荆州农业局发布的干旱面积数据资料发现,运用ENVISAT-ASAR GM卫星监测数据反演四湖地区干旱情况是可行的。In this study,the ENVISAT ASAR GM satellite monitoring data was used to inverse the farmland soil moisture distribution of Four-lake region under normal and drought conditions,since the backscattering coefficient was significantly positive with soil moisture.With comparison of the differences of soil moisture under normal and drought conditions,the reduction of soil moisture in the two conditions was calculated to get the spatial distribution of the drought in Four-lake region.By comparison with the drought index spatial distribution from Jingzhou Weather Bureau and the arid area data from Agricultural Bureau of Jingzhou,the ENVISAT-ASAR GM satellite monitoring data was accurate to inverse the droughts in Four-lake region.

关 键 词：土壤水分 ENVISAT-ASAR GM数据 干旱 反演 

分 类 号：S[农业科学]