Evaluating the Impact of Coal Mining on Groundwater Storage in the Loess Plateau Based on GRACE Data
The Loess Plateau is the largest coal energy base in China,and studying the relationship between coal mining and groundwater resource consumption is of great significance.Firstly,based on GRACE/GRACE-FO data and GLDAS hydrological model,the groundwater storage changes in the Loess Plateau from 2006 to 2020 were inverted;Secondly,combining coal mining data to correct signal interference caused by coal mining in GRACE inversion results;Finally,the ANN model was used to simulate the spatiotemporal variation trend of normal water consumption in the Loess Plateau,and based on this,the impact of coal mining on the changes in groundwater reserves was analyzed.The study found that:1)After deducting the interference of coal mining,the changes in land water storage and groundwater storage on the Loess Plateau from 2006 to 2020 were-0.53±0.16 cm/year and-0.66±0.08 cm/year,respectively;2)It is estimated that the mine tunnel drainage in Shanxi province in the Loess Plateau area were-0.17±0.03 cm/year,-0.46±0.05 cm/year,which indicates that the coal mining output in the eastern part of the Loess Plateau has caused seri-ous groundwater loss;3)In terms of space,the area with severe groundwater consumption after de-ducting the fitted normal water consumption from the groundwater retrieved by GRACE was consist-ent with the distribution of coal mining areas,indicating that coal mining was the main driving factor for groundwater reserve consumption in the eastern region of the Loess Plateau.This study reveals the important impact of coal mining on water resources in the Loess Plateau,which can provide guidance for coal and water resource management in the Loess Plateau region.
国家科技期刊平台
NSTL
万方数据
维普
