scholarly journals Establishing 3D hydrogeological solid model and database for sustainable groundwater management in the Vietnam Mekong delta

2021 ◽  
Vol 63 (4) ◽  
pp. 86-94
Author(s):  
Vu Thanh Tam ◽  
◽  
Nguyen Ngoc Ha ◽  
Ho Van Thuy ◽  
◽  
...  
Keyword(s):  
Groundwater Management ◽  
Mekong Delta ◽  
River System ◽  
Well Logs ◽  
Groundwater Depletion ◽  
Solid Model ◽  
Fine Grained ◽  
Sustainable Groundwater Management ◽  
Areal Distribution ◽  
Domestic Use

The Vietnam Mekong delta (VMD) is a tide-dominated delta formed by the Mekong river system. The sediments are dominantly fine grained and were deposited in the receiving basin with slight inclination of pre-existing deposits in the East sea and gulf of Thailand. The VMD is homeland to about 18 million people that exploit about 4-6 million m3/day of groundwater mainly for domestic use. In recent years, significant groundwater depletion has been occurring in many parts of the VMD due to excessive pumping. Consequently, the VMD has become increasingly faced with serious land subsidence, salt groundwater intrusion, and contamination. Establishing a 3D hydrogeological solid model and database are sorely needed to achieve sustainable groundwater management, and to serve as a basis for further in-depth analyses to quantify contributions from the above-mentioned hazards to current hydrogeological conditions. Therefore, a 3D hydrogeological solid model and database were built based on more than 1000 well logs available from the VMD. An areal distribution of the Holocene, Pleistocene, Pliocene, and Late Miocene subsurfaces from this 3D hydrogeological solid model and database showed zones of tectonic depression and uplift from Early Miocene - Quaternary. Also, the resulting areal distribution aquitards and aquifers thicknesses gave hints of ground saltwater intrusion and contamination.

Managed Aquifer Recharge (MAR) in Baluchistan, Pakistan, Present Situation and Future Prospects

2020 ◽  
Author(s):  
Sikandar Hayat ◽  
Hana Ben Mahrez ◽  
Zsóka Szabó ◽  
Ádám Tóth ◽  
Judit Mádl-Szőnyi
Keyword(s):  
Groundwater Management ◽  
Watershed Management ◽  
Land Surface ◽  
Managed Aquifer Recharge ◽  
Combination Method ◽  
Groundwater Depletion ◽  
The European Union ◽  
Aquifer Recharge ◽  
Vegetative Cover ◽  
Sustainable Groundwater Management

<p>Groundwater is depleting across the globe. According to NASA, 33% of the world’s major basins are overexploited. This water shortage could be alleviated by using Managed aquifer recharge (MAR)  techniques. MAR is defined by Gale, 2005 as “Intentional storage and treatment of water in aquifers”. The three most common methods of MAR are a) direct infiltration into the aquifer through wells, b) interception in the river bed, c) indirect infiltration from the land surface (Dillon et al., 2009a). Baluchistan, the largest province of Pakistan by area (44 % of the total area of Pakistan) has hyper-arid to dry climate and is comprised of 18 river basins, 11 of which are suffering from groundwater depletion (2-3 m cumulative decline in watertable) . To solve the issue, 300 delay action dams were constructed but due to high-intensity rainfalls, steep slopes, and lack of vegetative cover, the sediment erosion rate was very high which converted the delay action dams into evaporation ponds and this scheme failed. After the failure of delay action dams, the leaky dam technique along with effective watershed management was applied, this enhanced the percolation and reduced the sedimentation in the reservoir (Asharaf and Sheikh 2017). Leaky dams reduce the energy of flood, initiate the sedimentation of suspended load and release the water downstream through leakage to infiltrate in the riverbed (Gale, 2005). The integrated approach of watershed management, leaky dams, ditches, and furrows positively affected the watertable in the area (Asharaf and Sheikh, 2017). The goals of this research are to revise the development of MAR in Baluchistan (Pakistan), to display a MAR suitability map using INOWAS platform and update of MAR sites in Baluchistan at Global MAR portal. To delineate potential MAR sites, thematic layers such as slope, rainfall, drainage, land cover, and soil characteristics are integrated using GIS multi-criteria decision analysis (based on weighted linear combination method) (Senanayake et al, 2016).  MAR suitability maps are used as a preliminary step to field investigation to decide whether an area is suitable for a particular MAR type and hold the potential to be integrated into sustainable groundwater management plans . This study helps design a suitable groundwater management plan for Baluchistan.</p><p><strong>Acknowledgement:</strong></p><p>"This work is part of a project that has received funding from the European Union’s Horizon 2020 research and innovation programme under grant agreement No 810980."</p><p> </p><p>References</p><ul><li> Dillon, P., I. Gale, S. Contreras, P. Pavelic, R. Evans & J. Ward. (2009a), Managing aquifer recharge and discharge to sustain irrigation livelihoods under water scarcity and climate change. IAHS Publication 330, pp.1-12</li> <li> Gale, I. (2005). Strategies for Managed Aquifer Recharge (MAR) in semi-arid areas.UNESCO</li> <li> M.Ashraf and Ashfaq A. Sheikh (2017). Sustainable Groundwater Management in Balochistan. Pakistan Council of Research in Water Resources (PCRWR), pp. 34.</li> <li> Senanayake, I.P., Dissanayake, D.M.D.O.K., Mayadunna, B.B., Weerasekera, W.L.,( 2016). An approach to delineate groundwater recharge potential sites in Ambalantota, Sri Lanka using GIS techniques. Geoscience Frontiers, Special Issue: Progress of Machine Learning in Geosciences 7, 115–124.</li> </ul>

Sustainable groundwater management on the small island of Manukan, Malaysia

2011 ◽  
Vol 66 (3) ◽  
pp. 719-728 ◽  
Author(s):  
Sarva Mangala Praveena ◽  
Mohd Harun Abdullah ◽  
Kawi Bidin ◽  
Ahmad Zaharin Aris
Keyword(s):  
Groundwater Management ◽  
Small Island ◽  
Sustainable Groundwater Management

Assessing groundwater management sustainability of coastal cities by utilizing the City Blueprint Approach 

2021 ◽  
Author(s):  
Khawon Lee ◽  
Sun Woo Chang ◽  
Jeryang Park
Keyword(s):  
Water Management ◽  
Environmental Factors ◽  
Correlation Analysis ◽  
Groundwater Quality ◽  
Groundwater Management ◽  
Coastal Regions ◽  
Sustainable Groundwater Management ◽  
Coastal Cities ◽  
Major Factors ◽  
The City

<p>    Groundwater is the largest freshwater resource available on Earth, and many coastal regions are depending on groundwater as a primary freshwater source. For example, in Busan and Incheon, two of the largest coastal cities in South Korea, 5.7% and 7.0% of freshwater uses are from groundwater while only 1.8% is from groundwater in Seoul, the capital of the country. Globally, groundwater availability is diminishing primarily by population increase, and especially in coastal regions, this problem is exacerbated by overexploitation and seawater intrusion, which causes groundwater contamination and further reduces its availability. Here, we view the groundwater system and its management for sustainability as a complex problem that is associated with various social, economic, and environmental factors. By adopting the City Blueprint Approach (CBA), which has been used extensively for assessing the sustainability of integrated water management of numerous cities on the globe, we identify water management factors that potentially have direct and indirect links and feedbacks with groundwater variables. We selected Busan and Incheon as case studies for coastal cities that are facing the risk of groundwater salinization by seawater intrusion. This study aims to 1) assess City Blueprint (CB) of selected coastal cities, 2) identify major factors for coastal groundwater management through correlation analysis, and 3) suggest management options regarding identified factors for sustainable groundwater management of the study areas. Our results on CB indicate that the groundwater quality and quantity of the selected cities are currently in ‘good’ status. Also, from the correlation analysis, we identified heat risk and freshwater scarcity as the major factors that potentially can affect groundwater quantity. For groundwater quality, the factors of voice and accountability, regulatory quality, and rule of law and control of corruption, most of which had not been explicitly considered for groundwater management, were identified as the major factors. Some of these factors were assessed from ‘little concern’ to ‘very concern’ for both cities. These results indicate that, regarding the linkages between groundwater variables and other factors in concern, more actions beyond environmental factors should be taken for sustainable groundwater management. This study helps to understand how non-conventional factors could contribute to coastal groundwater, and can provide extensive options for sustainable groundwater management.</p><p> </p><p><strong>Acknowledgement</strong>: This research was supported by the Development program of Minimizing of Climate Change Impact Technology through the National Research Foundation of Korea (NRF), funded by the Korean government (Ministry of Science and ICT) (NRF-2020M3H5A1080775).</p>

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