Models for salt intrusion in the Rhine Delta

  • 88 Pages
  • 3.43 MB
  • English
Rand Corporation , Santa Monica, CA
Saltwater encroachment -- Netherlands -- Mathematical models., Salinity -- Netherlands -- Mathematical mo
StatementJ.P. Koenis, T.F. Kirkwood.
SeriesRand note -- N-1500/19-NETH, Policy analysis of water management for the Netherlands -- v. 19
ContributionsKirkwood, T. F.
The Physical Object
Paginationxvii, 88 p. :
ID Numbers
Open LibraryOL16499220M

To support researchers to publish their research Open Access, deals have been negotiated with various publishers.

Depending on the deal, a discount is provided for the author on the Article Processing Charges that need to be paid by the author to publish an article Open Access. In many delta's of the world salinity intrusion imposes limits to fresh water availability. With increasing population and industry, the need for fresh water increases.

But also salinity intrusion is expected to increase due to changes in river discharge, sea level and storm characteristics. In the Rhine-Meuse delta salt intrusion is impacted by human activities as well, like deepening of Author: F.

Baart, W. Kranenburg, A. Luijendijk. A general numerical model capable of reproducing long internal waves in stratified fluids has been constructed with the aim of investigating the salt wedge penetration in the Delta of the Po river, where the installation of a MW thermo-electric plant is foreseen.

The working hypothesis of the model, in accordance with the actual phenomenology of the river, is the one-dimensional Cited by: 5.

At these times, salt transport into the Rhine Meuse Delta is mainly produced by a reversal of the net, tide-averaged flow. These results imply that measures aiming to reduce salt intrusion by enhancing vertical mixing in the Rotterdam Waterway can be expected to.

This Virtual Delta includes a ‘digital twin’ model of the Rhine-Meuse estuary that shows the effects of all the measures in SALTISolutions. Wouter Kranenburg, a salt intrusion expert at Deltares: ‘In the Virtual Delta, we are testing the interaction between scientific knowledge, innovative solutions and.

The paper introduced a 2-D and 3-D coupling flow and salinity mathematical model to study the tidal current fields and salt data in January,compared between computation results and the field data indicates that the model could reasonably simulate the hydrodynamic and salt fields, which can be the base of the research on the saltwater intrusion prediction technology.

Salt intrusion occurs when a volume of salt water is heavier than the same volume of fresh water. Seawater weighs on average 2 to 3% more than fresh water. In areas where both fresh and salt water are present, fresh water floats on top of the heavier Figure 2.

Propagation of the (red) salt wedge from the sea to the right across the soil. Salt leaks at the IJmuiden sea locks Models for salt intrusion in the Rhine Delta book to salt intrusion in the North Sea Canal.

This creates risks for the water intake point at the Nieuwer lock. To prevent the salt water from entering deep into the Amsterdam-Rhine Canal, fresh water is continuously discharged from the Waal via the Amsterdam-Rhine.

The inclusion of the convergence length a is the result of considering an exponentially varying cross-section. If the estuary has a more pronounced funnel shape (a small), the salt intrusion length is large; apparently the salt intrusion through mixing is easier in a funnel-shaped estuary than in a pris- matic estuary.

However, an ecomorphodynamic model that is able to evaluate nature-based solutions to counteract salt-intrusion on the estuarine spatial scale for time scales of up to years (i.e. including climate change) is missing. A high-fidelity model will be constructed of the Rhine-Meuse delta. Wang et al.

() explored the dynamic mechanism of saltwater intrusion and the influencing factors with a high-resolution three-dimensional (3D) numerical model based on the Finite Volume Coastal Ocean Model (FVCOM), which covered the entire river network, the. Therefore, a 1D hydrodynamic model of the Rhine–Meuse estuary was used to describe the transport of water and salt.

This Northern Delta Basin (NDB) model is part of the Dutch National Water Model (NWM), a set of hydraulic and hydrological models and tools set. In many delta's of the world salinity intrusion imposes limits to fresh water availability. Where globally the need for fresh water is increasing, at many places also salinity intrusion is expected to increase due to changes in river discharge, sea level and storm characteristics.

In manipulated delta's like e.g. the Rhine-Meuse delta, salt intrusion is impacted by human activities as well. Salt intrusion in the pre-development system was found to be slightly more sensitive to outflow and responded faster to changes in outflow than in the contemporary system.

Changes in estuary outflows were responsible for more of the salt intrusion differences between the two systems than were changes in estuary geometry and bathymetry. At the July 25 th meeting of the Delta Stewardship Council, council members heard a presentation on the challenges of managing the Delta’s salinity during times of drought.

Salinity in the Delta is largely a tug of war between the daily and seasonal tides pushing in from San Francisco Bay and the flow of fresh water coming down through the rivers and heading out of the Delta towards the Bay. SALTISolutions – Salt intrusion through urbanizing deltas: Solutions.

Freshwater is vital for drinking water, nature, agriculture and industry. However, the availability of freshwater is under pressure in deltas throughout the world. will produce a virtual model (digital twin) of the Rhine-Meuse Delta. This model will integrate knowledge.

Our analysis shows an increase in salt intrusion and tidal amplitudes along several branches. The in-depth analysis of the model results and studying the short-term processes revealed a crucial role for subtidal water level in temporal variation of freshwater in the multi-channel estuarine system.

Rhine-Meuse Delta since then. At low Rhine dis- charges (Q salt intrusion.

Details Models for salt intrusion in the Rhine Delta FB2

With increasing Rhine discharge the sluices are gradually opened during low tide on the North Sea. At high Rhine discharg- es (Q > 9, m s s-l), the sluices are completely open. Rhine delta, and a potential mitigation measure. To this end, a one-dimensional modelling approach was used that enabled studying 50 years of variation in discharge and tide in current and future climate.

It was found that all locations are increasingly vulnerable to salt intrusion caused by the. Email your librarian or administrator to recommend adding this book to your organisation's collection. Estuaries.

Description Models for salt intrusion in the Rhine Delta FB2

David Prandle; Online ISBN: Minimum length of salt intrusion in estuaries. Models of stratification and frontal movement in shelf seas. Deep-Sea Research, 28, – to prevent salt intrusion.

With increasing Rhine dimensional ZWENDL model. The fraction of time in which river Rhine discharge is exceeded is also given. Part of R-M Delta (Rhine km)   The density driven salt-water intrusion process was simulated with the use of a SUTRA (Saturated-Unsaturated TRAnsport) model.

Physical parameters, initial heads, and boundary conditions of the delta were defined on the basis of available field data, and an areal, steady-state groundwater model was constructed to calibrate the observed head. of salt intrusion in estuaries. For one-dimensional dynamic simulation of the hydrodynamics and salinity intrusion the modelling suite SOBEK is available.

In the Netherlands this software is used to evaluate the impact of for example measures and climate change on salinity intrusion in the Dutch Rhine Meuse Delta. There is a well-tested theory for the computation of salt intrusion in alluvial estuaries that is fully analytical and predictable, in the sense that it has well-tested analytical equations to predict the mixing behaviour of the estuary based on measurable quantities, such as channel topography, river discharge and tidal characteristics.

This theory has been described in a range of.

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Salt intrusion into the Rotterdamsche Waterweg plays a major role in the water management of the Netherlands. The objective of the modeling described in this volume is to estimate the salt concentration caused by salt intrusion from the sea of water at various.

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Multi-channel estuaries, such as the Mekong Delta in Vietnam and the Scheldt in the Netherlands, have characteristics of both the river and the sea, forming a unique environment influenced by tidal movements of the sea and freshwater flow of the river.

This study addresses a number of knowledge gaps in multi-channel estuaries by developing a predictive analytical approach for salinity. The potential of geophysics to map salt water intrusion in the Burdekin Delta.

90 associated with clay bands. However in areas of significant saline water, higher conductivity is found in sand (aquifer) bands and relatively less in clay bands. Figure 2: DEM over the Burdekin Delta, 10 m pixel resolution, submetre vertical resolution (from NR&E).

The salt content of drainage water flowing down the San Joaquin River in the Delta, primarily from the west side of the San Joaquin Valley, is high, and sources of dilution water are limited. A sound, well-maintained levee system is also vital to protecting the Delta’s water quality, as well as the farms and towns and transportation corridors.

Increased salt water intrusion into deltas is an important effect of climate change and sea level rise. Although the general processes are well understood, the locally specific effects are not.

To enable management and adaptation, the present situation and its links to. Policy Analysis of Water Management for the Netherlands: Vol. XIX, Models for Salt Intrusion in the Rhine Delta Author: J.

P. Koenis Subject: The objective of the modeling described in this volume is to estimate the salt concentration caused by salt intrusion from the sea of water at various points.

Created Date: 2/18/ AM.Delta in China, which forms the main study area in this proposal, the Mersey in the UK, as well as the Rhine Delta and Ems Estuary in the Netherlands/Germany. Deltaic and estuarine regions are exposed to interlinked and possibly conflicting pressures, often related to the dynamics of the transition zone between fresh and saline water.

NHI is a set of integrated models for surface water, the unsaturated zone and groundwater. Surface water and salt balances are obtained using a 0‐dimensional water balance approach in combination with results of 1D‐hydrodynamic SOBEK flow models.

NHI is the central model used in the Dutch Delta Programme's Freshwater Policy study.