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Quantification of temporal variations in groundwater level using satellite imagery technique: a case study of Rachna Doab, Pakistan
International Journal of Environmental Science and Technology ( IF 3.0 ) Pub Date : 2022-04-20 , DOI: 10.1007/s13762-022-04162-3
A. A. Nadeem 1 , Y. Zha 1 , K. Mehmood 2 , M. Awais 3 , M. M. Afzal 4 , H. Hussain 5 , A. Shaheen 6 , B. Aslam 7
Affiliation  

Globally, surface water, groundwater, soil moisture, snow storage, permafrost, canopy water, and wet biomass constituents make up terrestrial water storage (TWS), which plays a significant role in the hydrological water balance. Groundwater storage (GWS) is a major parameter that plays a significant role in groundwater resource management. The groundwater modeling tools and in situ data are not enough to cover the large areas. Recently, remote sensing technology can be used to collect continuous information on the hydrological cycle in a low-cost way. The spatio-temporal measures of groundwater storage anomalies are helpful for sustainable groundwater management strategies. The ability of the Gravity Recovery And Climate Experiment (GRACE) satellite and the Global Land Data Assimilate System (GLDAS) to detect GWS in the Rachna Doab transboundary, which is experiencing hazardous groundwater extraction, is assessed in this study. The spatio-temporal groundwater storage variations were evaluated from January 2005 to December 2015 using GRACE satellite data. The GRACE-based GWS anomalies positively agreed with groundwater levels of in situ data. The statistical analysis (RMSE = 26.34 mm, correlation = 0.65) demonstrates that GRACE has competently captured both phase and magnitude in Rachna Doab. Still, there is a significant deviation in the trend of groundwater storage detected from June 2007 to July 2009, where in situ data have revealed a considerable rise in GWS compared to GRACE-derived GWS. The mean GWS changes of Rachna Doab are 1.4 cm for the year 2015. Compared to the relevant year, the increase in groundwater level is due to a high amount of rainfall in 2015. The average groundwater storage variation data for 2005–2015 showed a decline of 0.39 mm in the region. The region requires to adopt water-saving practices and groundwater policies implementation.



中文翻译:

使用卫星图像技术量化地下水位时间变化:以巴基斯坦 Rachna Doab 为例

在全球范围内,地表水、地下水、土壤水分、积雪、多年冻土、树冠水和湿生物质成分构成了陆地蓄水(TWS),在水文水平衡中发挥着重要作用。地下水储量(GWS)是一个重要参数,在地下水资源管理中发挥着重要作用。地下水建模工具和现场数据不足以覆盖大面积区域。最近,遥感技术可用于以低成本方式收集有关水文循环的连续信息。地下水储存异常的时空测量有助于制定可持续的地下水管理策略。重力恢复和气候实验 (GRACE) 卫星和全球陆地资料同化系统 (GLDAS) 在 Rachna Doab 跨界探测 GWS 的能力,正在经历危险的地下水开采,在本研究中进行了评估。使用 GRACE 卫星数据评估了 2005 年 1 月至 2015 年 12 月的地下水储存时空变化。基于 GRACE 的 GWS 异常与现场数据的地下水水位呈正相关。统计分析(RMSE = 26.34 mm,相关性 = 0.65)表明 GRACE 已胜任地捕获 Rachna Doab 中的相位和幅度。尽管如此,从 2007 年 6 月到 2009 年 7 月检测到的地下水储存趋势仍然存在显着偏差,现场数据显示,与 GRACE 衍生的 GWS 相比,GWS 显着上升。2015 年 Rachna Doab 的平均 GWS 变化为 1.4 厘米。与相关年份相比,地下水位上升是由于 2015 年的大量降雨。2005-2015 年平均地下水储量变化数据显示该地区下降了 0.39 毫米。该地区要求采取节水措施和实施地下水政策。

更新日期:2022-04-20
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