Research on Model of Groundwater Level Distribution in the Oasis and Desert Ecotone Using Remote Sensing
绿洲—荒漠交错带地下水位分布的遥感模型研究

The purpose of this study is to determine the depth of occurrence of groundwater and to evaluate the groundwater level distribution in the oasis and desert ecotone. In this research, on the basis of the regression analysis of groundwater levels and soil water content data measured in the field, a model of groundwater level distribution using remote sensing (GLDRS) was established using Landsat 7 ETM+ image, by dint of practical work and field data examination. To obtain water content of soil precisely using Landsat 7 ETM+image,which is related to the remote measurement of groundwater level, the concept and model of optical vegetation cover is led in. The results of the experimental teste of the GLDRS model in the oasis and desert ecotone of Qira county, Xinjiang Uyghur Autonomous Region are discussed. A good correspondence (correlation coefficient is 0.901) was obtained between the groundwater level at control points, where direct measurements were made, and those derived from Landsat 7 ETM+data. Groundwater level distribution in the whole ecotone was evaluated and presented in the form of thematic maps.