| 基于Aster数据的新疆渭——库绿洲及其周边地区土地沙化信息提取 |
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| 引用本文： | 吴明艳,;翁永玲,;戚浩平,;周少红.基于Aster数据的新疆渭——库绿洲及其周边地区土地沙化信息提取[J].现代测绘,2014(6):5-8. |
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| 作者姓名： | 吴明艳 ;翁永玲 ;戚浩平 ;周少红 |
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| 作者单位： | [1]东南大学交通学院,江苏南京210096; [2]东南大学化学化工学院,江苏南京210096 |
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| 基金项目： | 国家自然科学基金资助项目（41071264）; 中国地质调查局/中国国土资源航空物探遥感中心项目（1212010510218-01） |
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| 摘 要： | 以新疆渭干河——库车河绿洲及其周边地区为研究区,在野外调查的基础上,基于Aster数据,利用NDVI、植被盖度作为特征变量,结合偏最小二乘回归法模型反演得到的盐分含量(SSC)指标作为决策树分类的各节点的判别函数,通过决策树分类方法实现了沙化土地信息的提取与制图。结果表明结合植被覆盖信息与土壤特性能够在提取沙化信息的同时区分出盐渍化土壤,结果与野外调查较为一致。该研究为大区域土壤沙化信息提取与制图提供了较好的方法。
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| 关 键 词： | 遥感 植被指数 土壤沙化 盐渍化 |
Maping Soil Desertification in the Weigan and Kuqa River Delta Oasis area with Aster data |
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| Institution: | WU Ming-yan, WENG Yong-ling, QI Hao-ping, ZHOU Shao-hong (1 School of Transportation,Southeast University,Nanjing Jiangsu 210096, China; 2 School of Chemistry＆ Chemical Engineering, Southeast University, Nanjing Jiangsu 210096, China) |
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| Abstract: | This paper aims to map the desertification around the Weigan and Kuqa River Delta Oasis area in Xinjiang .Based on field measurements and image analysis ,the vegetation indexes such as NDVI ,VC（vegetation cover） were calculated with the Aster image .The SSC（soil salinity content ） was estimated by PLSR model .Then combined the NDVI ,CV and SSC ,the decision functions and decision tree were built to map the desertification using decision tree classification techniques . The results indicated that combination of vegetation index and soil property （SSC） could extract soil desertification area separated from soil salinization area .The map of soil desertification consistent well with field investigate .This study offered a good method for mapping of soil desertification over a large area . |
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| Keywords: | remote sensing vegetation index soil desertification soil salinization |
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