基于MODIS数据的沙漠化地区地下水位遥感监测模型的建立——以毛乌素沙地为例

Study on remote sensing monitoring model of groundwater level in Aeolian desertification areas——A case study of Mu Us Aeolian desertification areas,China

为了研究沙漠化地区地下水位的分布状况,利用MODIS卫星遥感数据,采用遥感一数学一模型学融合的研究方法,在实地考察沙漠化地区地下水位、土壤水分和其它辅助资料的基础上,通过土壤水分和地下水位的线性方程,提出了基于MODIS影像数据,在土壤中存在毛细管补给条件时,简便、有效地监测沙漠化地区地下水埋深的遥感模型,并在毛乌素沙漠化地区进行了实地验证。结果表明,该模型反演地下水位和实测地下水位之间的相关系数为0.868,误差较小,研究结果符合实际。认为在较大范围且地下水埋深不大于7 m的沙漠化地区,利用MODIS多波段遥感模型监测并评价地下水位分布是可行的。

In order to study the distribution of the groundwater level in Aeolian desertification areas,this study used the MODIS satellite remote sensing data and the remote sensing-mathematical-model of a fusion science research method,based on the field investigation of the groundwater level,soil moisture and other supporting information in the Aeolian desertification areas.Through the experimental equation of the soil moisture and groundwater level,it proposed a remote sensing model to evaluate the distribution of groundwater level model based on the MODIS image data.And this model was proven in field in Mu Us Aeolian desertification areas.The analysis result shows that the correlation coefficient of the measured groundwater level and the remote sensing retrieved water level is 0.868,the error is small,and the result is conformed to the reality.