基于影像光谱特征分析的盐碱地遥感制图研究——以吉林省大安市为例

Remote Sensing and Mapping of Saline Sodic Land Based on Spectral Characteristics for Da'an City

基于遥感光谱分析技术分析轻盐弱碱地、轻盐中碱地、轻盐强碱地、中盐强碱地、重盐强碱地、中盐化碱地、重盐化碱地、碱化盐地的光谱特征,建立了各种盐碱地的典型解译标志,在此基础上,利用GIS技术进行盐碱地专题信息提取与制图。以吉林省大安市为例,得出:该区土壤盐碱化程度严重且分布较集中,重度盐碱地面积多,占总盐碱地的60.33%,占大安市土地总面积的22.87%,其次为轻度盐碱地和中度盐碱地。图3,表2,参9。

Saline-shght alkaline soils, saline-moderate alkaline soils, saline-strong alkaline soils, moderate saline-strong alkaline soils, highly saline-strong alkaline soils, moderate saline alkali soil, strong sahne alkali soils and alkali saline soils were analyzed based on spectral analysis technique and the signs of different degree of salinity were established. Furthermore, we used GIS technology to extract thematic information of saline soils and to map. It was found that the saline soils densely distributed in this area and salinity is severe. Highly saline-alkaline land dominated accounting for 60.33% of the total salinized lands and 22.87% of the total land area of Da＇an city, followed by moderate saline-alkaline soil and salinealkaline soil. Key words：