Determination of groundwater sustainable yield using a numerical modelling approach for the Table Mountain Group sandstone aquifer, Rawsonville, South Africa

Li, Lin; Lin, Haili

doi:10.1007/s10040-018-1902-3

Cited by 11 publications

(3 citation statements)

References 22 publications

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“…To investigate the impact of coal mining on groundwater, researchers have applied mathematical analysis and numerical modelling techniques. They explore how groundwater enters the coal mine cave, how the groundwater level changes in the mining area, how groundwater discharge alters, and how groundwater regimes reshape the hydrogeological environment (Bahrami et al 2014;Dafny et al 2010;Hanna et al 1994;Lin and Lin, 2019;Naidu et al 2013;Rani and Chen, 2010;Surinaidu et al 2014;Wang et al 2019;Zhang, 2013).…”

Section: Introductionmentioning

confidence: 99%

Effects of coal mining and tunnel excavation on groundwater flow system in karst areas by modeling: A case study in Zhongliang Mountain, Chongqing, Southwest China

Li,

Kang,

et al. 2023

Journal of Groundwater Science and Engineering

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A karst groundwater system ranks among the most sensitive and vulnerable types of groundwater systems. Coal mining and tunnel excavation can greatly change the natural hydrogeological flow system, groundwater-dependent vegetation, soil, as well as hydrology of surface water systems. Abandoned coal mine caves and proposed highway tunnels may have significant influences on groundwater systems. This study employs MODFLOW, a 3D finite-difference groundwater model software, to simulate the groundwater system's response to coal mining and tunnel excavation impact in Zhongliang Mountain, Chongqing, from 1948 to 2035. The results show a regional decline in groundwater levels within the study area following mining and tunnel construction. The groundwater flow system in the study area evolves from the Jialing River groundwater flow system to encompass the Jialing River, Moxinpo highway tunnel, Moxinpo, and the Liujiagou coal mine cave groundwater flow systems between 1948 and 2025. With the completion of tunnel construction, the groundwater level at the top of the tunnel is gradually restored to the water level in the natural state. The model also predicts groundwater level variations between 2025 and 2035. The groundwater level will rise further initially, however, it may take about 10 years for the system to stabilize and reach a new equilibrium. In light of these findings, it is advised that changes in groundwater flow systems caused by tunnel construction should be modeled prior to the practical construction. This approach is crucial for evaluating potential engineering and environmental implications.

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Section: Introductionmentioning

confidence: 99%

Effects of coal mining and tunnel excavation on groundwater flow system in karst areas by modeling: A case study in Zhongliang Mountain, Chongqing, Southwest China

Li,

Kang,

et al. 2023

Journal of Groundwater Science and Engineering

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“…In the field of groundwater monitoring in open-pit coal mining areas, through long-term monitoring and analysis of the mining area in Riyadh, Saudi Arabia, Yihdego and Drury [15] found that open-pit mining activities in arid areas resulted in a significant drop in groundwater level. Existing articles on groundwater dynamic observation and data analysis mainly focus on urban groundwater source areas [11,12,[25][26][27][28] and underground coal mining area [29][30][31][32][33][34][35][36], there are few articles about the spatial and temporal distribution charac-teristics of groundwater, disturbance range, and factors under the condition of high-intensity mining in open-pit coal mines, and the distribution of the diving ecological groundwater level needs to be further studied.…”

Section: Introductionmentioning

confidence: 99%

Spatial and Temporal Distribution of Groundwater in Open-Pit Coal Mining: A Case Study from Baorixile Coal Mine, Hailaer Basin, China

Chen

et al. 2022

Geofluids

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Groundwater distribution influenced by mining activities is hard to be tracked due to the lack of accurate and real-time monitoring data. To address the groundwater dynamic change data under the mining conditions of open-pit coal mines, a three-dimensional automatic observation network of groundwater was constructed, and this observation network takes open-pit as the center, showing a radioactive distribution, based on hydrogeological conditions, and observes different aquifers. The data was analyzed by integrating hydrology, mining activity, and meteorological data. Analytic hierarchy process was adopted to reveal the underground disturbance influencing factors, and suggestions for groundwater protection were given. The results show that the dynamic variations of the groundwater with time can be divided into 3 types (precipitation affected, unaffected type, and mining affected types). The drainage operation during the open-pit mining triggered the drop of groundwater level, resulting in a cone of depression. The maximum drawdown of the central groundwater level was 60 m. And the disturbance mainly occurred in the mining area where the maximum groundwater disturbance radius was 8 km. Artificial drainage was the main disturbance factor of groundwater, and the range of groundwater level drop within the disturbance radius was closely related to the distance from the open-pit coal mine and the drainage volume. The closer the distance to the mines and the higher the drainage volume led to the deeper the groundwater level drop. This study shows the importance of the three-dimensional observation network of groundwater and provides a good reference for groundwater resources protection and ecological restoration in open-pit coal mines.

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“…Before there was the concept of sustainable yield, safe yield was widely applied by constraints of GW quality, supply, economic and law/regulations (Todd et al 1980). While the sustainable yield is estimated by a certain amount of GW extraction for a long duration without impact on environment and socio-economic (Lin et al 2019). For instance, e sustainable yield can be understood as "the allowable net draft at steady state for a selected equilibrium head" (Mink 1980) or GW system must reach equilibrium state (Sophocleous 2000, Bredehoeft 2002).…”

Section: Sustainable Yield Estimation Of the Aquifer Systemmentioning

confidence: 99%

Impacts and adaptive measures for groundwater use in the Mekong delta. case study : Tra Vinh province

Van

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Because of the rapid growth of population and fast economic development in the Vietnamese Mekong Delta (VMD), the surface water resources are unable to meet these demands and groundwater is also over-abstracted.� Groundwater depletion and saline water intrusion become the main problems that threaten drinking water supplies, farming systems, and livelihoods in the delta, especially coastal areas. It is necessary to provide a fully comprehensive picture of groundwater use (GWU) and its impact issues In Tra Vinh Province, a coastal province of VMD, dependency on GW increases from north to south which has a strong relation with availability of freshwater in major rivers during the dry season. In the dry season 2018,� GWU was estimated to be 346,279 m3day-1 based on the field survey data;� approximately 52 % of this use is for agricultural activities. Land surface temperature sensing technology is proved to be a good tool for interpolating distribution of GWU. In Tra Vinh Province for better GW management. The GW system in the study area has moved from a pristine system to a developed system then become a depleted system at present. Thus, the existing status of groundwater resources is unsustainable due to increasing of 25 years of GWU. The concept for sustainable yields in both quantity and quality, in the long run, has been introduced and proved to be beneficial by determining equilibrium state and controlling saline GW movement. The results of the sustainable models indicate that the current GWU (2018) needs to be reduced by 49 % to match with the sustainable yield of the aquifer system in Tra Vinh Province. In order to propose adaptive measures for sustainable GWU, a new land use structure of the Mekong Delta Plan is considered as a suitable measure to reduce a high proportion of GW demand in Tra Vinh Province. Adaptive behavior models (ABM) are developed based on Fogg Theories to understand behavior of local farmers in term of changing agricultural activities to cope with the effect of climate change.� ABM can help to clarify additional recommendations to enhance the successful implementation of the Mekong Delta Plan by adding more incentive and resources suited to each specific farmers and zones.

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Determination of groundwater sustainable yield using a numerical modelling approach for the Table Mountain Group sandstone aquifer, Rawsonville, South Africa

Cited by 11 publications

References 22 publications

Effects of coal mining and tunnel excavation on groundwater flow system in karst areas by modeling: A case study in Zhongliang Mountain, Chongqing, Southwest China

Effects of coal mining and tunnel excavation on groundwater flow system in karst areas by modeling: A case study in Zhongliang Mountain, Chongqing, Southwest China

Spatial and Temporal Distribution of Groundwater in Open-Pit Coal Mining: A Case Study from Baorixile Coal Mine, Hailaer Basin, China

Impacts and adaptive measures for groundwater use in the Mekong delta. case study : Tra Vinh province

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