以河套平原2000年和2006年遥感影像为数据源，应用遥感和GIS手段，通过统计和空间分析，研究了该地区盐渍化土地动态变化，并对其变化的影响因素进行了分析。结果表明：从2000年到2006年，研究区盐渍化土地面积明显减少，年平均降低率为5.34%；轻度和中度盐渍化土地程度均有减轻，轻度盐渍化土地占总土地比例由10.35%减少到6.82%，中度盐渍化土地由4.67%减少到1.94%，重度盐渍化土地程度变化不明显，由5.15%变为4.96%。综合分析认为，土地盐渍化是多种自然环境条件（包括区域蒸降比、地下水埋深、包气带岩性）和人类活动共同作用下的综合产物，但与地下水矿化度没有明显的相关关系。

Based on the remote sensing images of Hetao Plainin 2000 and 2006, the dynamic variation of salinization land was analyzed using the combination of remote sensing and GIS technology and statistics and spatial analysis. The results showed that the salinization land area has reduced significantly in the study area from 2000 to 2006 with an average annual decreasing rate of 5.34%. The levels of light and medium salinization land have reduced. The ratio of light salinization land to the total land decreased from 10.35% to 6.82%, and the ratio of medium salinization land to the total land decreased from 4.67% down to 1.94%. However, the heavy salinization land level has not changed significantly with the ratio varying from 5.15% to 4.96%. Soil salinization is affected by the natural environment (regional evaporation to precipitation ratio, groundwater depth, and vadose zone lithology) and human activities, , but it does not have an obvious relationship with groundwater salinity.

中国地质调查局地质大调查项目（1212010913010）