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Record nummer 2088465
Titel Field and model investigations of freshwater lenses in coastal aquifers
toon extra info.
Pieter S. Pauw
Auteur(s) Pauw, P.S.
Uitgever Wageningen : Wageningen University
Jaar van uitgave 2015
Pagina's IV, 158 pages figures, diagrams
Pagina's 1 online resource (PDF, IV, 158 pages) figures, diagrams
Annotatie(s) PhD thesis Wageningen University for the degree of doctor in the year 2015  toon alle annotatie(s)
Includes bibliographic references. - With summaries in English and Dutch
ISBN 9789462572928
Tutor(s) Zee, Prof. dr. S.E.A.T.M. van der ; Oude Essink, Dr. G.H.P. ; Leijnse, Prof. dr. A.
Promotiedatum 2015-06-08
Proefschrift nr. 6058
Samenvatting door auteur toon abstract

Field and model investigations of freshwater lenses in coastal aquifers

Pieter Pauw (2015); PhD thesis, Wageningen University, Wageningen, 160 pp.

Freshwater lenses are of vital importance for freshwater supply in coastal areas, but are currently under pressure in many regions worldwide. It is expected that in the future, freshwater lenses will be further jeopardized, amongst others due to an increasing population density in coastal areas, sea level rise, land subsidence and climate change. Knowledge of freshwater lenses in relation to these processes is of key importance to safeguard future freshwater supply in coastal areas.

Within the Dutch ‘Knowledge for Climate’ Program, various scientific research projects have been carried out in the last four years, related to freshwater supply in the Netherlands now and in the future. One of those research projects focused on freshwater lenses. This research has resulted in the thesis ‘Field and model investigations of freshwater lenses in coastal aquifers’, which will be defended by Pieter Pauw in public on June 8, 2015 at 4 pm at Wageningen University.

The research of Pieter Pauw has resulted in new insights with respect to the quantification of variable density groundwater flow and salt transport related to freshwater lenses. These insights are of practical use for 1) optimizing the sustainable exploitation of freshwater lenses, 2) quantification of salt loads and fluxes to the surface water, and estimating the thickness of thin rainwater lenses, using regional scale models, and 3) a fast estimate of the influence of tides on groundwater flow in unconfined aquifers. Furthermore, the research has resulted in new insights into the use of controlled drainage for artificial recharge below creek ridges. Using this new technique, the freshwater lenses below creek ridges can be expanded on the long term, which amongst others has a positive effect on freshwater supply (irrigation) in the Southwestern Delta of the Netherlands.

 

               

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Trefwoorden (cab) kustgebieden / watervoorziening / zoet water / wateropslag / geohydrologie / modellen / zuidwest-nederland / zeeland
Rubrieken Grondwaterhydrologie
Publicatie type Proefschrift
Taal Engels
Toelichting (Engels) A major problem of sustaining freshwater supply from freshwater lens is the invasion of saline groundwater into a fresh groundwater body. In many coastal areas saltwater intrusion has led to well closure and reduced freshwater supply. Furthermore, in the future saltwater intrusion is expected to increase due to sea level rise, climate change, land subsidence, and increasing population density in coastal areas. In the Netherlands, these stresses will also have a severe impact on the fresh coastal groundwater reserves. In view of this, a research project within the Dutch research program ’Knowledge for Climate’ was defined in 2010, aimed at: 1. Improving the insight into the modeling of freshwater lenses. 2. Defining measures to increase freshwater supply from freshwater lenses. In this thesis the results of four studies related to these objectives are presented.
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