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首页> 外文会议>Agriculture and Hydrology Applications of Remote Sensing; Proceedings of SPIE-The International Society for Optical Engineering; vol.6411 >Changing Landscapes: Monitoring Ecologically Sensitive Ecosystems in a Dynamic Semi-Arid Landscape Using Satellite Imagery: A Case Study in Ejin Oasis, Western China
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Changing Landscapes: Monitoring Ecologically Sensitive Ecosystems in a Dynamic Semi-Arid Landscape Using Satellite Imagery: A Case Study in Ejin Oasis, Western China

机译：改变景观：使用卫星图像监测动态半干旱景观中的生态敏感生态系统：以中国西部额济纳绿洲为例

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摘要

Land degradation has become an important issue in western China recently. Oasis ecosystem is sensitive to environmental disturbances, such as abnormal /extreme events of precipitations, water supply from upper watersheds, fluctuations of temperatures, etc. Satellite remote sensing of terrestrial ecosystems provides temporal dynamics and spatial distributions of landscape green covers over large areas. Seasonal green cover data are normally important in assessing landscape health (ex. desertification, rate of urban sprawl, natural disturbances) in arid and semi-arid regions. In this study, green cover data is derived from vegetation indices retrieved from MODIS sensors onboard Terra. The satellite images during the period April 2000 to December 2005 are analyzed to quantify the spatial distribution and temporal changes of Ejin Oasis. The results will help improving monitoring techniques to evaluate land degradation and to estimate the newest tendency of landscape green cover dynamics in the Ejin Oasis.
机译：土地退化最近已成为中国西部的重要问题。绿洲生态系统对环境扰动敏感，例如降水的异常/极端事件，上流域的供水，温度波动等。地面生态系统的卫星遥感提供了大面积景观绿化覆盖层的时间动态和空间分布。季节性的绿色覆盖数据通常对于评估干旱和半干旱地区的景观健康（例如沙漠化，城市扩张速度，自然干扰）非常重要。在这项研究中，绿色覆盖数据来自从Terra板上的MODIS传感器检索到的植被指数。分析了2000年4月至2005年12月期间的卫星图像，以量化额济纳绿洲的空间分布和时间变化。研究结果将有助于改善监测技术，以评估土地退化并评估额济纳绿洲景观绿化动态的最新趋势。

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