Guo Yi, Xing Naichen, Gan Fuping, Yan Baikun, Bai Juan
China Aero Geophysical Survey and Remote Sensing Center for Natural Resources, China Geological Survey, Beijing 100083, China.
Key Laboratory of Aerial Geophysics and Remote Sensing Geology, Ministry of Natural Resources, Beijing 100083, China.
Sensors (Basel). 2023 Jul 17;23(14):6452. doi: 10.3390/s23146452.
In this study, multiple remote sensing data were used to quantitatively evaluate the contributions of surface water, soil moisture and groundwater to terrestrial water storage (TWS) changes in five groundwater resources zones of Inner Mongolia (GW_I, GW_II, GW_III, GW_IV and GW_V), China. The results showed that TWS increased at the rate of 2.14 mm/a for GW_I, while it decreased at the rate of 4.62 mm/a, 5.89 mm/a, 2.79 mm/a and 2.62 mm/a for GW_II, GW_III, GW_IV and GW_V during 2003-2021. Inner Mongolia experienced a widespread soil moisture increase with the rate of 4.17 mm/a, 2.13 mm/a, 1.20 mm/a, 0.25 mm/a and 1.36 mm/a for the five regions, respectively. Significant decreases were detected for regional groundwater storage (GWS) with the rate of 2.21 mm/a, 6.76 mm/a, 6.87 mm/a, 3.01 mm/a, and 4.14 mm/a, respectively. Soil moisture was the major contributor to TWS changes in GW_I, which accounted 58% of the total TWS changes. Groundwater was the greatest contributor to TWS changes in other four regions, especially GWS changes, which accounted for 76% TWS changes in GW_IV. In addition, this study found that the role of surface water was notable for calculating regional GWS changes.
在本研究中，利用多源遥感数据定量评估了中国内蒙古五个地下水资源区（GW_I、GW_II、GW_III、GW_IV和GW_V）地表水、土壤水分和地下水对陆地水储量（TWS）变化的贡献。结果表明，2003 - 2021年期间，GW_I区的TWS以2.14毫米/年的速率增加，而GW_II、GW_III、GW_IV和GW_V区的TWS分别以4.62毫米/年、5.89毫米/年、2.79毫米/年和2.62毫米/年的速率减少。内蒙古五个区域的土壤水分普遍增加，速率分别为4.17毫米/年、2.13毫米/年、1.20毫米/年、0.25毫米/年和1.36毫米/年。区域地下水位储量（GWS）显著下降，速率分别为2.21毫米/年、6.76毫米/年、6.87毫米/年、3.01毫米/年和4.14毫米/年。土壤水分是GW_I区TWS变化的主要贡献因素，占TWS总变化量的58%。地下水是其他四个区域TWS变化的最大贡献因素，尤其是GWS变化，在GW_IV区占TWS变化量的76%。此外，本研究发现地表水在计算区域GWS变化方面的作用显著。
