Statistical and Numerical Assessments of Groundwater Resource Subject to Excessive Pumping: Case Study in Southwest Taiwan

Shih, Dong Sin; Chen, Chia-Jeng; Li, Ming Hsu; Jang, Cheng‐Shin; Chang, Che Min; Liao, Yu‐Ming

doi:10.3390/w11020360

Cited by 15 publications

(4 citation statements)

References 29 publications

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“…The integrated surface-subsurface WASH123D model was applied to simulate groundwater levels under the pumping-free scenario over the Pingtung Alluvial Plain in Southwest Taiwan [74]. The significant discrepancies found between the simulated and observed GLs were indicative of excessive (mostly illegal) pumping which induced serious regional land subsidence and seawater intrusion.…”

Section: Supplementary Materialsmentioning

confidence: 99%

Assessing Water Withdrawals in Scarce-Data Transboundary Areas by Use of Dynamic Precipitation–Flow Relationships: The Case of the Hasbani River Basin

Shentsis

Rosenthal

Flexer

et al. 2021

Water

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The present study proposes a nonstandard solution to the problem of assessing water withdrawals (AWW) in the scarce-data transboundary basin. The applied AWW method operates with the open-source available data on precipitation and river flow and thereby overcomes the usual restriction due to lack of data on shared water use in the Middle East. Analysis of dynamic precipitation-flow relationships enable to separate the effect of water withdrawals from the total decline of river flow under the decreasing precipitation. This study is the first which provides complete information (1972–2020) on water withdrawals from total, surface, and base flow of the Hasbani River (Lebanon). The resulting values that exceed by far earlier published estimates were confirmed by (i) indirect indices (area of irrigated land and population), and (ii) validation of the AWW method based on independent data on water use (Israel Water Authority). The study results are useful for water balance estimations, as well as for management of water resources in the Jordan River headwaters basin and in the entire Lake Kinneret Basin. The AWW method can be applied to other transboundary basins and enables historical and real-time monitoring of water withdrawals as a necessary database for settlement of riparian water relations.

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Section: Supplementary Materialsmentioning

confidence: 99%

Assessing Water Withdrawals in Scarce-Data Transboundary Areas by Use of Dynamic Precipitation–Flow Relationships: The Case of the Hasbani River Basin

Shentsis

Rosenthal

Flexer

et al. 2021

Water

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“…IMOD is a simulation system that models groundwater flow with rapid, flexible, and consistent sub-domain modeling techniques that implement the modular 3D finite-difference groundwater models MODFLOW 2005 and MODFLOW 6 of the U.S. Geological Survey. Application of MODFLOW to the description and prediction of the hydrogeological conditions of the aquifer systems has increased significantly and covers various types of research problems that have occurred worldwide [5,41,42,[82][83][84][85][86][87][88].…”

Section: Numerical Modelingmentioning

confidence: 99%

Assessment of the Impact of the Spatial Extent of Land Subsidence and Aquifer System Drainage Induced by Underground Mining

Guzy

Malinowska

2020

Sustainability

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The environmental impact assessment of underground mining usually includes the direct effects of exploitation. These are damage to rock mass and land subsidence. Continuous dewatering of the aquifer system is, however, necessary to carry out underground mining operations. Consequently, the drainage of the aquifer system is observed at a regional scale. The spatial extent of the phenomenon is typically much wider than the direct impact of the exploitation. The research presented was, therefore, aimed at evaluating both the direct and the indirect effects of underground mining. Firstly, the spatial extent of land subsidence was determined based on the Knothe theory. Secondly, underground mining-induced drainage of the aquifers was modeled. The 3D finite-difference hydrogeological model was constructed based on the conventional groundwater flow theory. The values of model hydrogeological parameters were determined based on literature and empirical data. These data were also used for model calibration. Finally, the results of the calculations were compared successfully with the field data. The research results presented indicate that underground mining’s indirect effects cover a much larger area than direct effects. Thus, underground mining requires a broader environmental assessment. Our results can, therefore, pave the way for more efficient management of groundwater considering underground mining.

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“…Surface water supply in the Pingtung area accounts for only 20% of the total water demand, with groundwater being the primary water source for various water users [26]. Due to the lack of effective management of groundwater extraction and the fact that groundwater pumping areas are often not recharge areas, excessive pumping during the dry season can easily lead to groundwater over-withdrawal, resulting in land subsidence and seawater intrusion in coastal areas of the Pingtung Plain [27][28][29][30][31]. Despite monitoring and management efforts by the government, the actual total volume of groundwater extraction remains unknown.…”

Section: Introductionmentioning

confidence: 99%

Safe Groundwater Level Estimation in Pingtung Plain, Taiwan

Yeh

Zhi-mou

et al. 2023

Water

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The groundwater resources in the Pingtung Plain are crucial water sources in southern Taiwan. However, they have been significantly impacted by climate change, resulting in changes in groundwater quality and quantity in the region. To effectively manage groundwater extraction, this study utilized runs theory to analyze the safe groundwater levels at six groundwater level observation stations located in the proximal fan, mid fan, and distal fan areas of the Pingtung Plain. The methodology involved dividing the range between the maximum and minimum groundwater levels at each station into 20 equal intervals. The groundwater levels were then sorted in ascending order, and the cumulative frequency percentiles of groundwater levels in each interval were calculated to determine the truncation levels for runs theory. Subsequently, the groundwater over-extraction duration and severity were computed. By comparing the results with the groundwater management levels set by the Water Resources Agency of the Ministry of Economic Affairs, it was found that the safe groundwater levels in the proximal fan and distal fan areas were the average of observation data plus 0.5 times the standard deviation. The over-withdrawn duration for these areas was approximately 8 to 10 months and 8 months, respectively. In the mid fan area, the safe groundwater level was based on the average of observation data, and the over-withdrawn duration ranged from 6 to 9 months.

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Statistical and Numerical Assessments of Groundwater Resource Subject to Excessive Pumping: Case Study in Southwest Taiwan

Cited by 15 publications

References 29 publications

Assessing Water Withdrawals in Scarce-Data Transboundary Areas by Use of Dynamic Precipitation–Flow Relationships: The Case of the Hasbani River Basin

Assessing Water Withdrawals in Scarce-Data Transboundary Areas by Use of Dynamic Precipitation–Flow Relationships: The Case of the Hasbani River Basin

Assessment of the Impact of the Spatial Extent of Land Subsidence and Aquifer System Drainage Induced by Underground Mining

Safe Groundwater Level Estimation in Pingtung Plain, Taiwan

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