内蒙古自治区河套灌区冻结期土壤盐分的多极化雷达响应分析

发布时间：2018-03-22 21:12

本文选题：雷达遥感　切入点：土壤盐分　出处：《江苏农业科学》2016年03期 　论文类型：期刊论文

【摘要】：土壤盐渍化严重影响河套灌区的农业生态和社会经济的发展,了解土壤盐渍化现状已成为亟待解决的问题。传统测量方法已无法满足人们对大面积土壤盐渍化分布的需求,相比之下,遥感能够快速获取盐渍地的宏观分布及变化情况。遥感作为一种新的技术手段应运而生,由于可见光、红外遥感存在一定局限性,具有全天候、穿透性强等优点的雷达遥感成为研究热点。以内蒙古自治区河套灌区磴口县为研究区,结合Radarsat-2四极化雷达遥感数据,对冻结期土壤的盐渍化进行响应分析。结果表明,极化组合(HV~2+HH~2)/(HV~2-HH~2)对不同盐渍土有较强的响应性与分离性,利用该极化组合建立回归模型,进而对研究区进行反演分析。经实测数据检验,该方法可在一定程度上满足盐渍化监测的需要,优于传统盐渍土分类方法。
[Abstract]:Soil salinization seriously affects the development of agricultural ecology and social economy in Hetao Irrigation area. Understanding the present situation of soil salinization has become an urgent problem to be solved. In contrast, remote sensing can quickly obtain the macroscopic distribution and change of salinized land. As a new technical means, remote sensing emerges as the times require. Because of visible light, infrared remote sensing has some limitations and has all-weather. Radar remote sensing with strong penetrability has become a research hotspot. Taking Dengkou County in Hetao Irrigation District of Inner Mongolia Autonomous region as the research area, the response of soil salinization during freezing period is analyzed by combining with Radarsat-2 four-polarization radar remote sensing data. The polarization combination HVH ~ (2) H ~ (+) / H ~ (2) H ~ (2) H ~ (2 +) has strong response and separation to different saline soils. By using this polarization combination, a regression model is established, and then the inversion analysis of the study area is carried out, which is verified by the measured data. This method can meet the needs of salinization monitoring to some extent and is superior to the traditional classification method of salinized soil.
【作者单位】：河套学院土木工程系;
【基金】：内蒙古自治区高等学校研究项目(编号:HJZY263) 内蒙古自治区高等学校创新团队发展计划(编号:NMGIRT-B1611) 河套学院校级重点课题(编号:HTXYZZ13002)
【分类号】：S156.4

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