绿洲—荒漠交错带地下水位分布的遥感模型研究

以利用卫星遥感数据评价干旱区绿洲－荒漠交错带地下水位的分布作为主要研究目的，使用波段Landsat-7ETM 图像，用遥感－数学－模型学融合的研究方法，在实地考察地下水位，土壤水分和其他辅助资料的基础上，建立土壤水分和地下水位的实验方程，提出了评价地下水位分布的遥感模型－GLDRS模型。利用GLDRS模型对新疆策勒绿洲－荒漠交错带进行了实地验证，结果表明，研究结果符合实际，GLDRS多波段模型优越单波段模型，理论地下水位和实测地下水位之间的相关系数为0．901。

Research on Model of Groundwater Level Distribution in the Oasis and Desert Ecotone Using Remote Sensing

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.