SUBSOL is an EU funded project to promote innovative, practical concepts for advanced freshwater management, with the common objective of protecting, enlarging and sustainably utilizing fresh groundwater resources in coastal areas.
These subsurface water solutions (SWS) are built on experiences with Managed Aquifer Recharge and Aquifer Storage and Recovery, but their applicability is much wider due to innovations in water well design and configuration, allowing for advanced groundwater management, and maximum control over freshwater resources.
The SUBSOL Knowledge Environment is an online, flexible and adaptable platform to search for or share information about solutions to problems that frequently occur in freshwater resources and ecosystems of coastal areas, such as seasonal water shortage, saltwater intrusion, and degradation of wetlands. It consists of three parts: A Marketplace, a Knowledge Base and a Toolkit, all provided through a unified web-based environment.


The web-based marketplace is the environment in which the interested parties can find information regarding successful implementations, design of products and implementation of innovative solutions, aiming at dissemination and promotion for potential adoption and replication in similar environments, in order to solve all or part of their problem.

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    Knowledge Base

    The knowledge base provides information on what methods are available regarding technical solutions for groundwater management in areas with brackish or saline aquifers, what has already been applied and tested under different contexts and what were the main lessons learned.

    SWS Solutions

    A set of innovative, practical concepts for protection, enlargement and utilization of freshwater resources in coastal areas.

    Reference Applications

    Collected experiences, case studies and information for sustainable groundwater management in coastal areas.



    A series of online and open tools that provide an answer to how appropriate solutions for sustainable groundwater resources management in coastal areas can be selected, designed and implemented

    A versatile and portable web application that aims to gather various types of data from various locations, store them in the database and visualize them for the user to view.
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  • A screening tool that scans an area to identify locations that can be suitable for applying subsurface water solutions, performing spatial operations on layers that describe the topographical and hydrogeological conditions of the study area.
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  • SUBSOL Office Open XML Toolbox

    This application enables developers of models based on popular spreadsheet applications like Microsoft Excel or LibreOffice Calc to easily provide access to their models to other users over the Internet, without the need to translate the model into another programming language.
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  • Web application

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    Highlight: Reference Application
    ASR-Coastal Ter Laak in Wateringen (Netherlands)
    Ter Laak is a 13 hectares greenhouse company, growing orchids. In 2017, they renewed and expanded their company. In the new situation, there is an aboveground basin to store 50 mm of rainfall from their...

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    Recent Products and Services: SUBSOL Office Open XML Toolbox 7 months, 3 weeks ago   ASR-Coastal Tool 11 months, 1 week ago   Freshmaker Tool 11 months, 1 week ago  
    Recent Applications: The Amsterdam Watersupply Dunes (Netherlands) - Literature review 8 months, 1 week ago   Liwa Strategic Storage, Abu Dhabi (UAE) 9 months, 1 week ago   Deep well infiltration Watervlak, DWAT - Literature review 10 months, 3 weeks ago