LIVIVO - The Search Portal for Life Sciences

zur deutschen Oberfläche wechseln
Advanced search

Search results

Result 1 - 3 of total 3

Search options

  1. Article ; Online: Management of saltwater intrusion using 3D numerical modelling: a first for Pacific Island country of Vanuatu.

    Sharan, Ashneel / Datta, Bithin / Lal, Alvin / Kotra, Krishna K

    Environmental monitoring and assessment

    2024  Volume 196, Issue 2, Page(s) 120

    Abstract: Small island countries like Vanuatu are facing the brunt of climate change, sea level rise (SLR), tropical cyclones, and limited or declining access to freshwater. The Tagabe coastal aquifer in Port Vila (the capital of Vanuatu) shows the presence of ... ...

    Abstract Small island countries like Vanuatu are facing the brunt of climate change, sea level rise (SLR), tropical cyclones, and limited or declining access to freshwater. The Tagabe coastal aquifer in Port Vila (the capital of Vanuatu) shows the presence of salinity, indicating saltwater intrusion (SWI). This study aims to develop and evaluate effective SWI management strategies for Tagabe coastal aquifer. To manage SWI, the numerical simulation model for the study area was developed using the SEAWAT code. The flow model was developed using MODFLOW and the transport model was developed using MT3DMS. Whereby SEAWAT solved flow and transport equations simultaneously. The model was calibrated, and different scenarios were evaluated for the management of SWI. The SLR was also considered in the model simulations. The results indicated that increased population, pumping rates, and SLR affect the SWI rates. To manage the SWI, we introduced hydraulic barriers like barrier wells and injection wells which effectively managed SWI in Tagabe coastal aquifer. The results from this study are significantly important whereby, the water managers, site owners, and governing bodies can use the management strategies presented in this study to create policies and regulations for managing SWI rates in Port Vila. Additionally, the water industry, private businesses, and investors who wish to extract groundwater from the Tagabe can use this study as a reference for daily or yearly freshwater production rates without the risk of SWI.
    MeSH term(s) Vanuatu ; Pacific Islands ; Environmental Monitoring ; Climate Change ; Water
    Chemical Substances Water (059QF0KO0R)
    Language English
    Publishing date 2024-01-09
    Publishing country Netherlands
    Document type Journal Article
    ZDB-ID 782621-7
    ISSN 1573-2959 ; 0167-6369
    ISSN (online) 1573-2959
    ISSN 0167-6369
    DOI 10.1007/s10661-023-12245-y
    Database MEDical Literature Analysis and Retrieval System OnLINE

    Full text online

    More links

    Kategorien

    In stock of ZB MED Bonn / Germany

    Z 5186: Show issues

    Order via subito

    This service is chargeable due to the Delivery terms set by subito. Orders including an article and supplementary material will be classified as separate orders. In these cases, fees will be demanded for each order.

    Inter-library loan at ZB MED

    Your chosen title can be delivered directly to ZB MED Cologne location if you are registered as a user at ZB MED Cologne.

  2. Article ; Online: Integrating numerical modelling and scenario-based sensitivity analysis for saltwater intrusion management: case study of a complex heterogeneous island aquifer system.

    Sharan, Ashneel / Datta, Bithin / Lal, Alvin

    Environmental monitoring and assessment

    2023  Volume 195, Issue 5, Page(s) 553

    Abstract: Population growth, industrialisation and increasing agricultural demands have significantly stressed groundwater resources in Pacific Island countries (PICs). Climate change and sea-level rise also affect the groundwater resources in PICs. These ... ...

    Abstract Population growth, industrialisation and increasing agricultural demands have significantly stressed groundwater resources in Pacific Island countries (PICs). Climate change and sea-level rise also affect the groundwater resources in PICs. These anthropogenic and natural factors give rise to saltwater intrusion (SWI), a major growing environmental problem in the PICs. SWI is a highly non-linear process which makes it more complex to manage. However, with the help of numerical modelling, SWI can be monitored, managed and controlled. In the present study, we used an illustrative study area where the hydrogeological parameters and other boundary conditions used are similar to the PICs aquifer systems in Vanuatu. The scenarios include changing the barrier wells, injection wells, recharge, hydraulic head, hydraulic conductivity and grid size. The numerical simulation model of the study area was developed, and different scenarios were tested using SEAWAT modules. Apart from salt, we also modelled leachate and engine oil present in the investigated study area to see how it affects the freshwater wells over time. The scenario-based sensitivity analysis tests indicate that injection wells, recharge and hydraulic conductivities are highly sensitive, and with the proper modification, SWI can be managed or regulated. The sensitivity of grid size showed that the simulated results varied within the 10% range of different gird sizes. Moreover, it was also found that the rise in sea level or coastal heads by 0.3-1 m does not significantly cause further SWI encroachment in aquifers. The results from this study are very crucial in this modern era when freshwater needs in coastal areas, especially PICs, are rapidly increasing, and fresh groundwater resources are declining. The novel outcome presented in this study opens pathways for further detailed modelling and numerical studies in the field of SWI management strategy development and is, therefore, beneficial for policymakers, groundwater modellers and general scientific communities.
    MeSH term(s) Seawater/analysis ; Environmental Monitoring/methods ; Fresh Water ; Sea Level Rise ; Groundwater/analysis
    Language English
    Publishing date 2023-04-11
    Publishing country Netherlands
    Document type Journal Article
    ZDB-ID 782621-7
    ISSN 1573-2959 ; 0167-6369
    ISSN (online) 1573-2959
    ISSN 0167-6369
    DOI 10.1007/s10661-023-11159-z
    Database MEDical Literature Analysis and Retrieval System OnLINE

    Full text online

    More links

    Kategorien

    In stock of ZB MED Bonn / Germany

    Z 5186: Show issues

    Order via subito

    This service is chargeable due to the Delivery terms set by subito. Orders including an article and supplementary material will be classified as separate orders. In these cases, fees will be demanded for each order.

    Inter-library loan at ZB MED

    Your chosen title can be delivered directly to ZB MED Cologne location if you are registered as a user at ZB MED Cologne.

  3. Article: A review of groundwater sustainability crisis in the Pacific Island countries: Challenges and solutions

    Sharan, Ashneel / Lal, Alvin / Datta, Bithin

    Journal of hydrology. 2021 Dec., v. 603

    2021  

    Abstract: Population growth and rapid industrialization have imposed excessive demand for groundwater in Pacific Island countries (PICs). To meet this demand, over pumping of groundwater is practised in majority of the PICs, which eventually causes saltwater ... ...

    Abstract Population growth and rapid industrialization have imposed excessive demand for groundwater in Pacific Island countries (PICs). To meet this demand, over pumping of groundwater is practised in majority of the PICs, which eventually causes saltwater intrusion (SWI) in coastal aquifers. The geographical location of PICs makes them more vulnerable to natural means of SWI. However, anthropogenic activities also cause groundwater contamination in PICs. The main objectives of this review are to identify the water sources in PICs, the major challenges groundwater faces, and solutions or strategies for monitoring, management, and prevention of the identified challenges. This study has revealed that SWI is highly common in PICs and that there is a knowledge gap with limited research on groundwater. This review also highlights that with the use of the latest technologies, 3D modeling, simulation–optimization techniques, artificial intelligence, relevant policies and regulations on groundwater and mass awareness will help in monitoring, managing and preventing SWI and other ways of contamination in coastal aquifers for PICs.
    Keywords artificial intelligence ; groundwater ; groundwater contamination ; industrialization ; population growth ; saltwater intrusion ; Pacific Ocean Islands
    Language English
    Dates of publication 2021-12
    Publishing place Elsevier B.V.
    Document type Article
    ZDB-ID 1473173-3
    ISSN 1879-2707 ; 0022-1694
    ISSN (online) 1879-2707
    ISSN 0022-1694
    DOI 10.1016/j.jhydrol.2021.127165
    Database NAL-Catalogue (AGRICOLA)

    Full text online

    More links

    Kategorien

    Order via subito

    This service is chargeable due to the Delivery terms set by subito. Orders including an article and supplementary material will be classified as separate orders. In these cases, fees will be demanded for each order.

To top