Using HJ - I satellite remote sensing data to surveying the Saline soil distribution in Yinchuan Plain of China

摘要

Soil salinity is a major geological and environmental problem in Yinchuan Plain, and severely restricts the sustainable development of local agricultural, social-economic. Therefore, it is very significant that using remote sensing to survey the saline soil distribution for improving management of wise use the saline soil. In this study, we use China HJ-1B satellite remote sensing data to investigate the saline soil distribution in Yinchuan Plain in 2009 by combining with texture features using support vector machine classification. The research results showed that severe saline soil area of 53,000 hm2, moderate saline soil area of 46,300 hm2, and mild saline soil area of 150,500 hm2. The saline soil distribution rule is as follows: severe salinization of soil mainly distribute in the northern, moderate saline soil in the central region, and mild salinization mainly in the south of the Yinchuan Plain. Finally, underlying causes were analyzed including climate, topography, hydrology, agricultural production and etc. And the control measures of salinization hazard discussed.