基于荒漠化差值指数(DDI)的精河流域荒漠化研究

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英文篇名：A Study on Desertification Based on Desertification Difference Index in Jinghe Watershed 作者：毋兆鹏 ; 王明霞 ; 赵晓 英文作者：WU Zhao-peng;WANG Ming-xia;ZHAO Xiao;Institute of Geography and Tourism Science,Xinjiang Normal University;Xinjiang Key Laboratory of Lake Environment and Resources in Arid Zone; 关键词：反照率—植被指数空间 ; 荒漠化差值指数(DDI) ; 荒漠化 ; 精河流域 英文关键词：Albedo-NDVI space;;desertification difference index(DDI);;desertification;;Jinghe watershed 中文刊名：STTB 英文刊名：Bulletin of Soil and Water Conservation 机构：新疆师范大学地理科学与旅游学院;新疆干旱区湖泊环境与资源重点实验室; 出版日期：2014-08-15 出版单位：水土保持通报 年：2014 期：v.34;No.201 基金：新疆维吾尔自治区自然科学基金“艾比湖流域精河绿洲土地荒漠化时空动态演变研究”(2013211A022) 语种：中文; 页：STTB201404037 页数：5 CN：04 ISSN：61-1094/X 分类号：194-198

摘要

利用精河流域1990和2011年TM-5影像数据,基于荒漠化差值指数(DDI)构建了精河流域反照率(Albedo)—植被指数(NDVI)特征空间下的荒漠化遥感监测模型。结果表明,1990—2011年精河流域土地荒漠化类型转化以恶化为主;年蒸发量和年均温是导致研究区荒漠化面积增加的主要自然因素,该区也存在潜在风蚀荒漠化风险;由气候变化导致的荒漠化发展,近些年来正被政府的积极措施部分抵消,但人口压力大,水资源低效利用等问题仍是未来荒漠化防治过程中需要解决的重点问题。
        Using the TM-5remote sensing data in 1990 and 2011in Jinghe watershed,a model to remote monitor desertification under the Albedo—NDVI scatter plot of Jinghe watershed was built based on desertifition difference index(DDI).The results showed that the desertification degree became severity from 1990 to 2011and the predominant natural factors were the annual evaporation and temperature.Moreover,there are many potential risks of wind-erosion desertification in study area.Although the active steps taken by government were counterbalancing desertification caused by climate change in recent years,the reversion of desertification was slowed down by the population pressure,the inefficient utilization of water resources,and human dimensions which needed to be overcome in the prevention and control of desertification in Jinhe watershed in the future.

引文

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