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用多个数据集评估水文成分对内蒙古陆地水储量变化贡献的评估

Yi Guo^1,2, Naichen Xing^1,2, Fuping Gan^1,2

¹China Aero Geophysical Survey and Remote Sensing Center for Natural Resources, China Geological Survey, Beijing 100083, China.

Sensors (Basel, Switzerland)

|July 29, 2023

概括

2003-2021年内蒙古陆地水储量变化因地区而异. 土壤湿度在一个区域的变化占主导地位,而地下水枯竭对其他地区产生了重大影响,突出显示了区域水资源的动态.

科学领域:

地球科学地球科学地球科学
水文学的水文学
遥感遥感遥感遥感

背景情况:

内蒙古面临着复杂的水资源管理挑战.
了解陆地储水 (TWS) 动态对于可持续用水至关重要.
储水组件的区域差异需要详细调查.

研究的目的:

量化评估地表水,土壤水分和地下水对内蒙古五个地下水资源区 (GW_I-V) TWS 变化的贡献.
从2003年到2021年分析TWS组件的趋势和空间变化.
为了确定TWS在不同地下水资源区的变化的主要驱动因素.

主要方法:

利用多个遥感数据源进行定量分析.
分析了陆地水储量,土壤水分和地下水储量的时间趋势.
计算了每个储水组件对TWS总体变化的贡献.

主要成果:

陆地储水量在GW_I增加 (2.14 mm/a),但在GW_II-V减少 (-2.62至-5.89 mm/a).
在所有区域 (0.25至4.17毫米/年) 中,土壤湿度普遍增加.
在所有区域 (-2.21至-6.87毫米/年),特别是GW_IV (76%的TWS变化) 观察到地下水储量显著下降.
在GW_I (58%) 中,土壤水分是TWS变化的主要原因,而在GW_II-V中,地下水占主导地位.

结论:

在大多数内蒙古地下水资源区,地下水枯竭是一个主要问题.
土壤湿度动态在TWS变化中起着重要作用,特别是在GW_I.
遥感是监测和了解区域水资源动态,并为水资源管理战略提供信息的宝贵工具.

关键词:

格雷斯 (GRACE) 是一个恩典.在GWS中,GWS是指GWS系统.在内蒙古,内蒙古是内蒙古.在TWS中使用TWS.湖水湖水水湖水土壤水分土壤水分

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