Land subsidence and managed aquifer recharge in Pingtung Plain, Taiwan

Abstract. Taiwan is an oceanic nation with an area of approximately 36 000 km2. The Central Mountain Range was formed by the Eurasian and Philippine plates and stretches along the entire island from north to south, along the entire island, thus forming a natural line of demarcation for rivers on the eastern and western sides of the island. Pingtung Plain is formed by Quaternary alluvial fan material from the three main rivers. The aquifers comprise very coarse permeable sands and gravels under phreatic conditions in the north and less permeable sands under confined or even artesian conditions in the southern part of Pingtung Plain. The natural groundwater source is mainly from direct rainfall percolation and infiltration from the three main rivers, with their catchments lying partly outside the plain. The uncontrolled development of groundwater resources has led to undesirable effects, especially in the south, where aquaculture is concentrated. These effects are land subsidence, saline water intrusion, and lowering of water tables. It is thus one of the important key strategies in the solution of land subsidence, water resource development and flood control for sustainable development named Benefited Water Reuse from Storm Water in Pingtung, Taiwan. A serious of studies for this issue has been carried out. The feasibility study phase of the Artificial Recharge of Groundwater Project (ARGP) for Pingtung, Taiwan, was then implemented in 1997 using a MODFLOW simulation and an optimal model. Through the managed aquifer recharge model, the aquifer storage increases and the inundation scale decreases with land subsidence of the coastal area, as aimed at by the purpose of the controlled groundwater level. Infiltration mechanism simulation of artificial groundwater recharge, with the TOUGH2 model, was used to simulate the high infiltration behaviour in sequence in 2010. Both publications have been confirmed and approved by the Central Government and then approved by the environmental impact assessment. The ARGP was then implemented in May 2018 and operated for one wet season for the first phase with 50 ha and a total of 300 ha from May to October 2018. The sedimentation over the top of the recharge basin forms the clogging mechanism which has been analysed. The operation experience can further provide the mechanism process for research reference. The project, once implemented, can improve and mitigate land subsidence as well as formulate water banks for adapting and managing aquifer recharge.

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Enhancing geological and hydrogeological understanding of the Precipice Sandstone aquifer of the Surat Basin, Great Artesian Basin, Australia, through model inversion of managed aquifer recharge datasets

Hydrogeology Journal ◽

10.1007/s10040-019-02079-9 ◽

2019 ◽

Vol 28 (1) ◽

pp. 175-192

Author(s):

Phil Hayes ◽

Chris Nicol ◽

Andrew D. La Croix ◽

Julie Pearce ◽

Sebastian Gonzalez ◽

...

Keyword(s):

Oil And Gas ◽

Groundwater Resources ◽

Regional Scale ◽

Managed Aquifer Recharge ◽

Gas Production ◽

Aquifer Recharge ◽

Model Inversion ◽

Artesian Basin ◽

Geological Interpretation ◽

Great Artesian Basin

AbstractThe Precipice Sandstone is a major Great Artesian Basin aquifer in the Surat Basin, Queensland, Australia, which is used for water supply and production of oil and gas. This report describes use of observed groundwater pressure responses to managed aquifer recharge (MAR) at a regional scale to test recent geological descriptions of Precipice Sandstone extent, and to inform its hydrogeological conceptualisation. Since 2015, two MAR schemes have injected over 20 GL of treated water from coal seam gas production into the Precipice Sandstone, with pressure responses rapidly propagating over 100 km, indicating high aquifer diffusivity. Groundwater modelling of injection and inversion of pressure signals using PEST software shows the spatial variability of aquifer properties, and indicates that basin in-situ stresses and faulting exert control on permeability. Extremely high permeability, up to 200 m/day, occurs in heavily fractured regions with a dual-porosity flow regime. The broader-scale estimates of permeability approach an order of magnitude higher than previous studies, which has implications for the management of water resources in the Precipice Sandstone. Results also show the Precipice Sandstone to have broadly isotropic permeability. The results also support a recent geological interpretation of the Precipice Sandstone as having more limited lateral extent than initially considered. The study shows the effective use of MAR injection data to improve geological and hydrogeological understanding through groundwater model inversion. It also demonstrates the utility of combining hydrogeological and reservoir-engineer datasets in areas explored and developed for both groundwater resources and oil and gas resources.

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Monitoring managed aquifer recharge with electrical resistivity probes

Interpretation ◽

10.1190/int-2013-0192.1 ◽

2014 ◽

Vol 2 (4) ◽

pp. T155-T166 ◽

Cited By ~ 1

Author(s):

Vanessa Nenna ◽

Adam Pidlisecky ◽

Rosemary Knight

Keyword(s):

Electrical Resistivity ◽

Pore Pressure ◽

Water Saturation ◽

Groundwater Resources ◽

Early Time ◽

Time Lapse ◽

Managed Aquifer Recharge ◽

Limited Information ◽

Aquifer Recharge ◽

Hydraulic Gradients

The use of managed aquifer recharge (MAR) to supplement groundwater resources can mitigate the risks to an aquifer in overdraft. However, limited information on subsurface properties and processes that control groundwater flow may lead to low levels of recapture of infiltrated water, reducing the efficacy of MAR operations. We used long 1D electrical resistivity probes to monitor the subsurface response over one diversion season at five locations beneath an operating recharge pond in northern California. The experiment demonstrated the benefits of integrating geophysical and standard hydrologic measurements. The water table response interpreted from time-lapse electrical resistivity images was in good agreement with traditional pore-pressure transducer measurements at coincident locations. Moreover, the electrical resistivity measurements were able to identify vertical variations in water saturation that would not have appeared in pore-pressure data alone. Changes in saturation estimated from electrical resistivity models indicated large hydraulic gradients at early time and suggested the presence of highly permeable conduits and baffles between the surface and the screened interval of recovery wells. The interpreted structure of these conduits and baffles would contribute to the movement of a large amount of infiltrated water beyond the capture zone of recovery wells before pumping begins, accounting in part for the low recovery rates.

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A concept for managed aquifer recharge using ASR-wells for sustainable use of groundwater resources in an alluvial coastal aquifer in Eastern India

Physics and Chemistry of the Earth Parts A/B/C ◽

10.1016/j.pce.2008.05.001 ◽

2009 ◽

Vol 34 (4-5) ◽

pp. 270-278 ◽

Cited By ~ 20

Author(s):

H.M. Holländer ◽

R. Mull ◽

S.N. Panda

Keyword(s):

Coastal Aquifer ◽

Groundwater Resources ◽

Sustainable Use ◽

Managed Aquifer Recharge ◽

Aquifer Recharge ◽

Eastern India ◽

Asr Wells

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Analysis of Potential Risks Associated with Urban Stormwater Quality for Managed Aquifer Recharge

International Journal of Environmental Research and Public Health ◽

10.3390/ijerph16173121 ◽

2019 ◽

Vol 16 (17) ◽

pp. 3121 ◽

Cited By ~ 1

Author(s):

Song ◽

Du ◽

Keyword(s):

Groundwater Resources ◽

Oxygen Demand ◽

Water Shortage ◽

Managed Aquifer Recharge ◽

Aquifer Recharge ◽

High Concentration ◽

Sand Column ◽

Sustainable Resources ◽

Contamination Risk ◽

Urban Stormwater Quality

Managed aquifer recharge (MAR) can be used to increase storage and availability of groundwater resources, but water resources available for recharge are constrained due to a surface water shortage. Alternative resources, like stormwater, are receiving increasing attention as sustainable resources for reuse in MAR. However, pollutants in stormwater can impact groundwater quality, and cause clogging of the infiltration system. Based on the stormwater data in the literature, the physicochemical stormwater properties of data were analyzed. The results showed that concentrations of pollutants from different underlying surfaces varied widely. The main pollutants of stormwater were as follows: Total suspended particles (TSSs), organic matter represented by the chemical oxygen demand (COD), nutrients (total nitrogen, TN; total phosphorus, TP; and NH3–N), and metals (Zn, Pb, Cu, Cd, Fe, and Mn). Based on the simulation of TOUGHREACT, the contamination risk of pollutants for each type of stormwater was assessed. The risk of contamination was divided into four categories due to the different migration times of ions through the sand column. The iron ion has the highest risk of contamination, followed by Zn and Mn, and the contamination risk of nutrients and other metals (Pb, Cu, and Cd) are relatively low. Besides, the physical, biological, and chemical clogging risk were evaluated. The physical clogging potential of all types of stormwater is very high because of the high concentration of TSS. According to the concentration of TN that can spur the growth of bacteria and algae, the relative risk of biological clogging for stormwater is greenbelt stormwater < road stormwater < roof stormwater. However, only road stormwater has high chemical clogging due to the existence of iron, which can generate precipitation that blocks the pore volume.

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Opportunities and challenges for implementing managed aquifer recharge models in drought-prone Barind tract, Bangladesh

Applied Water Science ◽

10.1007/s13201-021-01530-1 ◽

2021 ◽

Vol 11 (12) ◽

Author(s):

Md. Iquebal Hossain ◽

Md. Niamul Bari ◽

Md. Shafi Uddin Miah

Keyword(s):

Groundwater Recharge ◽

Groundwater Resources ◽

Managed Aquifer Recharge ◽

Storm Water ◽

Water Runoff ◽

Aquifer Recharge ◽

Groundwater Levels ◽

Check Dams ◽

Supplementary Irrigation ◽

Barind Tract

AbstractThis study focuses on the Barind tract, a drought prone area situated in the north-west region of Bangladesh where inadequate rainfall and limited surface water have created high dependence on groundwater for irrigation and other purposes, leading to significant declines in groundwater level. Managed aquifer recharge (MAR) offers a potential solution to restore groundwater levels. This study sets out to identify the opportunities and challenges for implementing MAR in the Barind tract. To accomplish this aim, different data sets including bore log lithology, rainfall, groundwater levels, information about re-excavated ponds, dighis, kharies, beels, check dams, rubber dams, dug wells and other necessary information were collected from the Barind Multipurpose Development Authority (BMDA) and other sources and analyzed. Major opportunities for MAR are identified for about 2000 km of re-excavated kharies (canals) containing about 750 check dams, more than 3000 re-excavated ponds, a number of beels (comparatively large marshes) and other water bodies which are used to conserve runoff storm water for supplementary irrigation. The conserved water can be used for groundwater recharge and subsequently abstracted for irrigation. Furthermore, roof-top rain water from buildings can also be used for groundwater recharge purposes. In contrast, the major challenges include the high turbidity of storm water runoff leading to clogging of MAR structures, inadequacy of conventional direct surface methods of recharge due to the presence of a 15 m or more thick upper clay layer with limited percolation capacity, and lack of practical knowledge on MAR. Therefore, overcoming the challenges for MAR application is a prerequisite to maximize the opportunities from MAR that can support the sustainable use of groundwater resources.

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Water resources management of coastal semi-arid environments using Managed Aquifer Recharge and participatory modelling approaches.

10.5194/egusphere-egu2020-21536 ◽

2020 ◽

Author(s):

Andreas Kallioras ◽

Efthymios Chrysanthopoulos ◽

Anastasios Mitropapas ◽

Epaminondas Floros ◽

Sofia Nalbadi ◽

...

Keyword(s):

Water Resources ◽

Groundwater Resources ◽

Limited Resource ◽

Water Source ◽

Managed Aquifer Recharge ◽

Arid Environments ◽

Water Conflict ◽

Aquifer Recharge ◽

Intake Structure ◽

Semi Arid

Groundwater is a limited resource in coastal hydrogeological systems, especially in semi-arid environments where the irrigation demands are very high. Management of such hydrosystems is a very challenging process; while water conflict between different users as well as climate change conditions are magnifying this problem.Managed aquifer recharge &#8211; storing water in aquifers during times of excess &#8211; is considered as a sound engineering technique and a key strategy to support groundwater resources in such hydrologically sensitive regions by providing intermediate storage, bridging the gap between water demand and availability. In addition to the above, innovative modelling techniques that apply participatory approaches can be proved a valuable supporting tool for the management of groundwater resources within an optimized manner.The coastal field of Argolis (S. Greece) is used as a reference site to illustrate the above, where Managed Aquifer Recharge is applied on a full-scale mode since 1990, using karst groundwater as a recharge water source. The study area involves an extended and complex water infrastructure systems that includes: (a) a main intake structure -a submarine dam exploiting a system of submarine karstic springs-; (b) a conveyance system -mainly open canal structures- that assures the transport of water from the main intake structure and main pumping station up to the agricultural area; and (c) a cluster of Managed Aquifer Recharge facilities that divert water towards the subsurface either through deep groundwater wells or infiltration ponds at selected parts of the aquifer. &#160;&#160;&#160;&#160;This research presents the results of hydro&#8208;environmental modelling activities of Managed Aquifer Recharge and the preliminary work on participatory driven water resources modelling scenarios. This study is envisaged to contribute in the identification and valuation of socio&#8208;economic and environmental processes and linkages of groundwater uses and services.

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