GLOBGM v1.0: a parallel implementation of a 30 arcsec PCR-GLOBWB-MODFLOW global-scale groundwater model

We discuss the various performance aspects of parallelizing our transient global-scale groundwater model at 30′′ resolution (30arcsec; °1/41km at the Equator) on large distributed memory parallel clusters. This model, referred to as GLOBGM, is the successor of our 5′ (5arcmin; °1/410km at the Equator) PCR-GLOBWB 2 (PCRaster Global Water...

Nonlinear model predictive control of salinity and water level in polder networks: Case study of Lissertocht catchment

A significant increase in surface water salinization in low-lying deltas is expected globally due to saline groundwater exfiltration driven by rising sea levels and decreasing freshwater availability. Sustaining fresh water-dependent agriculture in such areas will entail an increased demand for fresh water flushing. Unfortunately, the...

Distributed memory parallel computing of three-dimensional variable-density groundwater flow and salt transport

Fresh groundwater reserves, being of vital importance for more than a billion of people living in the coastal zone, are being threatened by saltwater intrusion due to anthropogenic activities and climate change. High resolution three-dimensional (3D), variable-density (VD), groundwater flow and salt transport (FT) numerical models are...

Distributed memory parallel groundwater modeling for the Netherlands Hydrological Instrument

Worldwide, billions of people rely on fresh groundwater reserves for their domestic, agricultural and industrial water use. Extreme droughts and excessive groundwater pumping put pressure on water authorities in maintaining sustainable water usage. High-resolution integrated models are valuable assets in supporting them. The Netherlands...

Optimal salinity and water level control of water courses using Model Predictive Control

Worldwide, delta areas are under stress due to climate change. With rising sea<br/>levels and decreasing freshwater availability, surface water salinization due to<br/>groundwater exfiltration is expected to increase in these low-lying areas. To<br/>counteract surface water salinization, freshwater diverted from rivers is used to flush...

Global potential for the growth of fresh groundwater resources with large beach nourishments

Whether a coastal area is suitable for beach nourishments and can induce a growth in fresh groundwater resources depends on the appropriateness of the intended site for beach nourishments, and the attainable growth in fresh groundwater resources. In this study we presume that all eroding sandy beaches are suitable for large beach nourishments,...

Impacts of sea level rise and groundwater extraction scenarios on fresh groundwater resources in the Nile Delta Governorates, Egypt

As Egypt's population increases, the demand for fresh groundwater extraction will intensify. Consequently, the groundwater quality will deteriorate, including an increase in salinization. On the other hand, salinization caused by saltwater intrusion in the coastal Nile Delta Aquifer (NDA) is also threatening the groundwater resources. The aim...

Impact of coastal forcing and groundwater recharge on the growth of a fresh groundwater lens in a mega-scale beach nourishment

For a large beach nourishment called the Sand Engine – constructed in 2011 at the Dutch coast – we have examined the impact of coastal forcing (i.e. natural processes that drive coastal hydro- and morphodynamics) and groundwater<br/>recharge on the growth of a fresh groundwater lens between 2011 and 2016. Measurements of the morphological change...

Model Predictive Control of Salinity in a Polder Ditch under High Saline Groundwater Exfiltration Conditions: A Test Case

Surface water salinization in deltaic areas due to saline groundwater exfiltration is an important issue. Saline surface water will not be appropriate for drinking water production, agricultural and industrial use, and therefore, freshwater diverted from rivers is used for flushing the canals and ditches in coastal areas. The effects of climate...

Polder Flushing: Model Predictive Control of Flushing Operations to Effective and Real Time Control of Salinity in Polders

More than 35% of the world’s population live within 100 km of the coast. Groundwater resources in these areas are the main source for domestic, industrial and agricultural use. Worldwide, deltaic areas are under stress due to climate change, sea level increase and decrease in fresh water availability. In addition, in deltaic coastal areas around...

Veranderingen in het grondwatersysteem van het Markermeergebied

Voor het begrijpen van de oppervlaktewaterpeil-grondwater relatie en het bepalen van de uitstraling van peilverandering of deklaagvergraving van het Markermeer op zijn omgeving is een beter inzicht nodig over de opbouw van de ondiepe ondergrond en de variaties in de doorlatendheid (viz. hydraulische weerstand) van de deklaag. De onder de...

Onderzoek naar effecten van stopzetting grondwateronttrekking DSM Delft: Fase 1: Monitoringstrategie voor grondwaterstijging, waterkwaliteit en geotechniek - Hoofdrapport

Delft en omliggende gemeenten zullen in de komende jaren moeten anticiperen op de mogelijke veranderingen in het onttrekkingsregime voor grondwater van DSM Gist en de geplande aanleg van de spoortunnel onder Delft. Deze veranderingen hebben invloed op het watersysteem en daarmee op het waterbeheer. In het kader van het onderzoeksprogramma ...

Quickscan DSM-spoorzone: Verkenning van duurzame oplossingsrichtingen voor het waterbeheer in Delft en omgeving

Dit rapport is het resultaat van een verkennend onderzoek naar de effecten van de voorgenomen vermindering of stopzetting van de grondwaterwinning door DSM Gist in combinatie met de aanleg van de spoortunnel in Delft. Het onderzoek is uitgevoerd in opdracht van de gemeente Delft, Hoogheemraadschap van Delfland en de provincie Zuid-Holland door...

Fluid flow in the northern Broad Fourteens Basin during Late Cretaceous inversion

A basin-scale hydrogeological study of the inverted northern Broad Fourteens Basin, Netherlands offshore, has resulted in a reconstruction of geological evolution, an estimate of Late Cretaceous topography and model scenarios of syn-inversion meteoric water infiltration. This study was performed in the scope of a basin-scale analysis of the...

Impact of sea level rise on groundwater flow regimes: A sensitivity analysis for the Netherlands

Sea level rise: A literature survey

In order to assess the impact of sea level rise on Water Management, it is useful to understand the mechanisrns that determine the level of the sea. In this study, a literature survey is executed to analyze these mechanisms. Climate plays a centra! role in these mechanisms, Climate mainly changes due to a disturbance in the balance of incoming...