Versions Compared

Key

  • This line was added.
  • This line was removed.
  • Formatting was changed.

...


Project

G

S

IRegionApproachPeriod

Future Perspective Polder Terschelling

The climate is changing. This has consequences for the water system of the island of Terschelling. In this project, we are jointly looking for a sustainable future for Terschelling, with a focus on the polder: retaining fresh water and combating salinization, in addition to economic and ecological management. The project includes with field pilots, climate models and monitoring.

More information: https://deltalife.deltares.nl/february_2024/freshwater_supplies_on_terschelling

(tick)(tick)

The Netherlands (Wadden islands)

Field measurements, numerical modelling, pilotting2021-2026

Global overview salt water intrusion case-studies

At this website, an overview is given of more than 1600 articles (including SWIM articles since 1968) that refer to case-studies around the world on various themes with within the salt water intrusion community, such as geochemistry, geophysics, management of coastal aquifers, Submarine Groundwater Discharge, effects of sea level rise and climate change, modelling and monitoring techniques, island hydrogeology, paleohydrogeolog studies, and overwash, storm surges.

Post, V. E. A., Oude Essink, G. H. P., Szymkiewicz, A., Bakker, M., Houben, G. J., Custodio, E., & Voss, C. I. (2018). Celebrating 50 years of SWIMs (Salt Water Intrusion Meetings). Hydrogeology Journal, 26(6), 1767–1770. https://doi.org/10.1007/s10040-018-1800-8

(tick)

Global

Powerbi overiew of articles on various topics1968-2024

Zoetwaterboeren: watermanagement on an arable farm

Within this project Deltares works with Vertify and Wageningen University & Research on closing the water cycle for freshwater and nutrients on the scale of an arable farm. Goal is 'the farmer as water manager'. 

The project included monitoring of all water flows for both quantity and quality. Partners do monitoring of soil and crops. Based on monitoring results innovative measures are taken including new drainage , a drainwater-collection system and a purification and infiltration system. 

More information: https://www.zoetwaterboeren.nl/

(tick)(tick)

The Netherlands (North-Holland)

Field measurements, pilotting2022-2025

Innovative drainage pilots Schouwen-Duiveland

One of the challenges facing Zeeland is to combat the desiccation and salinisation of agricultural land. How Schouwen-Duiveland will also have sufficient freshwater in the future is being investigated in a Living Lab of which Deltares is part. Researchers from Deltares are working with farmers, governments and other knowledge institutions to test new, smart ways of drainage in the field. Anextended description of the project can be found here, and a more personal view on the importance of fieldwork in this project here.

(tick)

The Netherlands (Southwest Delta)

Field measurements and monitoring2022-2024

Design Monitoring Network Fresh Groundwater Resources Zeeland -  Technical and geohydrological research

Clients: Province of Zeeland and Water Board Scheldestromen 

Understanding the dynamics of fresh groundwater resources in the Zeeland subsurface is important for sustainable use of these resources. Many new agricultural withdrawals have been added over the past 10 years, but there is no monitoring of whether and what effect this is having on the freshwater lenses. In this project, a monitoring network was designed to monitor fresh groundwater resources. The measurement technique was been worked out based on a so-called 'automatic salt keeper'. This consists of a cable on which there are several electrodes, and a measuring instrument consisting of a sensor/switching module and telemetry.  Also a  geohydrological survey of potential measurement sites has been conducted. These locations were assessed based on available data of the subsurface, groundwater system and fresh-salt groundwater situation. On top, 53 conductivity probes were conducted as input for the design of the monitoring network. These locations will be equipped with a monitoring well for monitoring the phreatic groundwater level and a salinity probe for measuring at the fresh-salt distribution in the groundwater. The appropriate placement depth of the salinity monitor cable was determined for each location, using a fixed electrode section with as much as 24 electrodes over a total length of 11.5 m (electrode spacing of 0.5 m).

Report: Kaandorp, V. P., & Hopman, V. (2024). Ontwerp Meetnet Zoetwatervoorkomens Zeeland - Technisch en geohydrologisch onderzoek. In Deltares report 11207005-002-BGS-0001.

(tick)

The Netherlands (Southwest Delta)

Field measurements and monitoring technique2023-2024

DATA MINING FOR LARGE SCALE COASTAL GROUNDWATER MODELLING

Understanding current (and future) distributions of fresh-saline groundwater on a regional scale is essential given known anthropogenic and natural stressors - which are only expected to get worse over time. One way to inform freshwater management strategies and develop storylines of future freshwater (un)availability is through 3D groundwater salinity modelling. Given the regional scale of these models, the results are often highly uncertain – this is in part due to a lack of in-situ data. As a result, researchers at Deltares began work on an AI-powered data-mining tool. The method primarily involves the use of multimodal Large Language Models (LLMs) to read 1000’s of documents and extract data of interest in a structured format.

(tick)



GlobalAI, LLMs, Python2023-present

DELTA WEALTH

Delta Wealth contributes to solutions for a safe, ecologically healthy and economically prosperous SW-Delta in the next 50-100 years, by developing science-based knowledge on overarching adaptation strategies coined ‘I - protect-open’, ‘II - protect-closed’, ‘III - seaward-defence’, and their combination. There are 7 work packages (WP) that focus on different aspects ranging from flood risk management, salinity and fresh water supply, ecology, regional economy and welfare, public support and knowledge utilization. 

(tick)

(tick)
The Netherlands (Southwest Delta)
2024-present


LHM fresh-salt - National fresh-salt groundwater model

LHM fresh-salt is a national-scale variable density groundwater flow and salt transport model. The LHM fresh-salt is constructed using reproducible and transparent scripted workflows, allowing regular model updates and development. The LHM fresh-salt has been used in various national policy analysis studies, such as the Dutch Delta Program, the Knowledge Program on Sea Level Rise, National Groundwater Reserves. 

Regional clips of the LHM fresh-salt have also been used for various regional studies, e.g. investigating possible brackish water extraction in the Haarlemmermeer, or looking at future freshwater availability for the Zuiderzeeland water board. 

(tick)



The NetherlandsNumerical modelling2020-present

COASTAR

COASTAR is aimed at large scale freshwater supply by clever use of the subsurface. By storing freshwater underground and utilising brackish water, coastal areas can be provided with enough water to be used for drinking, irrigation and industry, now and in the future.

(tick)

X



The Netherlands, Chile, Vietnam
2016-present

FAME

Freshwater Availability in the Mekong Delta (FAME) is a collaborative, multiphase project focusing on scoping, piloting and providing upscaling advice to national partners in Vietnam on the implementation of shallow Aquifer Storage and Recovery (ASR) systems. These systems could provide farm-scale solutions to address the water-quality and availability issues being faced in Ben Tre and Trah Vinh provinces in the Mekong Delta, Vietnam.



(tick)

X



Vietnam
2019-present

FRESHEM

Fresh water supplies cannot be taken for granted in the Province of Zeeland in the Netherlands. The main surface waters are predominantly saline. A detailed picture of the current fresh-salt
water distribution is essential to detect possible trends in the subsoil and to respond in time to these trends. This project developed an approach to determine the three-dimensional chloride distribution in the groundwater by using HEM surveys in combination with a priori data, advanced modelling techniques and information about the groundwater system and especially geology. 

(tick)

X



The NetherlandsAirborne EM and numerical modelling2010-2016

Haringvliet - Kier

Enhancing fish migration leads to salt intrusion into fresh water reservoir. How to manage the salt water intrusion and maintain the fresh water supply to drinking water, agriculture and industry (Port of Rotterdam) is the challenge.


(tick)

X

(tick)

X

The NetherlandsField experiments, 3D hydrodynamic modeling<period>

Krammer Locks

The Krammer locks form the boundary between the saline Eastern Scheldt and the fresh water Lake Volkerak-Zoom. The locks will have a new method of limiting salt intrusion as a result of lock-operation by by using bubble screens and flushing with fresh water. To optimise lock-operation and manage salt intrusion into the fresh water lake, a decision support system is setup.


(tick)

X

(tick)

X

The NetherlandsSea Lock Formulation<period>

GO-FRESH

The goal of GO-FRESH (Geohydrological Opportunities Fresh Water supply) is to improve the use of existing fresh groundwater resources and create new freshwater reserves to increase regional self-sufficiency and reduce dependence on external freshwater supplies. The aims of the applied research project are: a. to investigate which measures actually ‘work’ in practice and b. to determine whether those measures are economically feasible. 

(tick)

X



The Netherlands
2012-2017

Selective Withdrawal at IJmuiden

The new shipping lock in IJmuiden will lead to increased salt intrusion into the North Sea Canal and subsequently in the Amsterdam-Rhine Canal. To combat this additional salt intrusion, a selective withdrawal structure will be built that will increase the outflow of saline water from the North Sea Canal.

Advanced measurement techniques were applied during physical scale model testing to validate the effectiveness of a salt screen near IJmuiden. These measurements have been used as validation for CFD models, which prove to represent the flow patterns around the salt screen accurately.


(tick)

X

(tick)

X

The NetherlandsPhysical scale model, CFD2016-present
<project image>

IJsselmeer

<short project description>




The Netherlands<method><period>
<project image>

Rijn-Maasmonding

<short project description>




The Netherlands<method><period>

Rise and Fall

This project aims to enhance the capabilities of individuals and organisations to develop sustainable strategies for dealing with groundwater extraction, land subsidence and saltwater intrusion in the increasingly urbanising Mekong Delta (Vietnam). We will enlarge the knowledge base of stakeholders (including policy makers, water managers and scientists) and work with them to develop and implement innovative tools and technologies in practice and policy. A new integrated delta model will be developed, linking surface water, groundwater and geo-mechanical models, to analyse the interrelated character of groundwater extraction, subsidence levels and saltwater intrusion.

(tick)

X



Vietnam
2014-2018

Saline groundwater - surface water interaction in coastal lowlands

Saline groundwater exfiltration is a common problem in the coastal zone of the Netherlands, but the hydrological processes and physiographic factors involved are not fully understood. Research is being conducted to identify the processes and physiographic factors controlling the spatial variability and temporal dynamics of the exfiltration of saline groundwater to surface water, and therefore the contribution of saline groundwater to surface water salinity. 

(tick)

X

(tick)

X


The Netherlands
2010-present

Small Island Developing States (SIDS)

Most small islands, such as in the Caribbean or the Pacific but also in Indonesia and the Netherlands often suffer from freshwater security. Surface water resources are limited, and they rely on small precious fresh groundwater lenses which are threatened by coastal erosion and over-exploitation. Deltares studied the dynamics of these fresh groundwater lenses using innovative monitoring techniques and the latest modelling tools.

(tick)

X





2015-2017

Smart freshwater management

The practice of ‘flushing’ presents a large burden on already limited freshwater resources. Notwithstanding, no formal goals or guidelines existed to manage the use of freshwater for flushing. This practice was found to be inefficient in lowering surface water salt concentrations. Together with water users, transparent and achievable goals were derived, and freshwater management was formalised to achieve these goals.

(tick)

X



The Netherlands
2015-2017

SWIBANGLA

Bangladesh is densely populated and it is expected that the population increases significantly in the coming decade. Demand for drinking water will increase accordingly. These developments may cause significant changes in the hydrological system, e.g. leading to a drop of groundwater pressures. Moreover, climate change and a sea level rise are predicted by the scenarios drawn by the International Panel of Climate Change (IPCC, 2013). This leads to, among others, an increase of salt water intrusion, in surface water as well as in groundwater. In this project, the focus is on salt water intrusion in coastal groundwater systems, as groundwater is the main resource of drinking water. 


(tick)

X



Bangladesh
2013-2014

Understanding salinisation processes in the Nile Delta

The salinisation of the precious fresh groundwater resources in the Nile Delta due to salt water intrusion and extensive groundwater use is a major concern for Egyptian water users and managers. Groundwater is used for irrigation, industrial and drinking purposes. Sea-level rise and the ongoing increase in the use of groundwater and surface water are expected to have a further negative effect on the groundwater system.

(tick)

X



Egypt
2013-2015

Water Nexus

"Salt water where possible, freshwater where necessary." Water Nexus is a 6 million euro NWO-STW research programme that ran from 2015 to 2020, supported by 25 partners from multinational and small/middle sized companies, consultancy firms, research institutes, water boards, and the Ministry of Infrastructure and Environment.

(tick)

X



The Netherlands
2015-2020

Nature Coast

The Sand Motor pilot creates a dynamic environment along the coastline of the Netherlands, in which (continuous) changes in the distribution of fresh and salt groundwater take place. Although the magnitude of the spatial and temporal changes in the density of the coastal groundwater is not known beforehand, it creates an ideal circumstance for the advancement of our knowledge on seawater intrusion processes.

(tick)

X



The Netherlands
2013-2016

...