摘要
利用1988年以来的遥感资料,计算了不同时期的NDVI,同时基于遥感影像和光谱特征直接提取了土地退化指标,分析了内蒙古自治区植被覆盖宏观变化和荒漠化的情况。结果表明:历史上水草丰美的锡林郭勒、呼伦贝尔草原的植被指数呈下降趋势,尤其是呼伦贝尔沙地植被指数下降幅度明显;近年来一些大的沙尘源地如浑善达克沙地、毛乌素沙地的植被呈持续好转状态;对内蒙古生态环境的保护任重而道远,在加紧治理一些风沙源地的同时,要加强对草原的保护与管理,在稳定生态的同时逐步提高农牧民的生产生活水平。
By using remote sensing data since 1988,NDVI in different periods was calculated,land degradation indicators were obtained based on remote sensing images and spectral characteristics,vegetation cover change and desertification situation in Inner Mongolia were analyzed.The results showed that： the vegetation index of Xilinguole grassland which has lush water and plant in history and Hulunbeier grassland assumed the declining trend,the vegetation index of Hulunbeier sandy land decreased obviously.In recent years,some big sandstorm source area like Hunshandake sandy land and Muus sandy land sustained improvement in vegetation.The protection of ecological environment in Inner Mongolia has a long way to go,while some sandstorm source areas were improved,it is necessary to strengthen the protection and management of grassland,at the same time in a stable ecosystem,the farmers＇ and herdsmen＇ s production and living standards increased gradually.
出处
《中国草地学报》
CSCD
北大核心
2011年第3期79-86,共8页
Chinese Journal of Grassland
基金
国家科技支撑计划"沙尘暴遥感监测与预报集成技术研究"子课题"省级沙尘暴遥感监测预警评估与服务应用示范"(2008BAC40B04)
中央级公益性科研院所基本科研业务费专项资金(中国农业科学院草原研究所2008-J-1)
关键词
遥感监测
植被覆盖
草原退化
Remote sensing monitoring
Vegetation cover
Grassland degradation
