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  • 软件名称:利用多源数据分析呼伦湖地表与地下水的动态变化
  • 软件大小: 0.00 B
  • 软件评级: ★★★
  • 开 发 商: 吴世坤,孙玉
  • 软件来源: 《遥感技术与应用》
  • 解压密码:www.gissky.net

资源简介

摘要: 湖泊对揭示区域环境演变特征与规律具有重要意义。为研究近30 a呼伦湖地区地表水面积与地下水水储量的变化,利用Google Earth Engine(GEE)云平台处理了1986~2018年间所有Landsat卫星影像。结合卫星测高所获得的水位数据,得到呼伦湖的水体面积长时间变化序列,并将其划分为4个阶段:2000年之前的平稳扩张阶段,2000~2012年的骤减阶段,2013~2015年为迅速回升阶段,2016年之后的稳定阶段。在此基础上,综合利用降水、蒸发以及河流流量等模型数据对其变化原因进行了全面分析,揭示了3个因素在4个阶段所发挥的不同作用。最后,利用水量平衡公式推算出地下水储量变化,分析了(1986~2013年)呼伦湖地下水水储量变化趋势,结果表明该地区地下水水储量持续减少。 关键词: Google Earth Engine;  呼伦湖;  水体面积变化;  地下水水储量     Abstract: Analyzing the dynamic changes of lakes is of great significance to revealing the environment evolution features. The changes in surface water area and groundwater storage of the Hulun Lake during the past 3 decades have been studied by processing all available Landsat images from 1986 to 2018 using Google Earth Engine. The time-series of surface water area changes, which is closely related to the water level change observed by satellite altimetry, is divided into four stages, including a steady increase (before 2000), a dramatic decline (2000 to 2012), a rapid recovery (2013 to 2015) and a level period (after 2016). A comprehensive analysis of the reasons for these changes has been done using multi-source models such as precipitation, evaporation and river flow. The role of each factors playing in the above mentioned four stages has been identified. Finally, according to the water balance formula, we estimated the groundwater changes, which is shown to be highly decreased.

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