Modelling foredune dynamics in response to climate change


Modelling foredune dynamics in response to climate change

Promovendus JGS (Joep) Keijsers MSc
Promotor prof.dr. CJ (Coen) Ritsema
Copromotor MJPM (Michel) Riksen
Alma dr. AV (Alma) de Groot
Organisatie Wageningen University & Research, Leerstoelgroep Bodemfysica en Landmanagement

ma 30 november 2015 08:30 tot 10:00

Locatie Aula, gebouwnummer 362
Generaal Foulkesweg 1
6703 BG Wageningen


In many sandy coastal areas, such as The Netherlands, sand dunes form a natural defense against flooding. Dune growth and preservation largely depend on the balance between marine erosion and sand input by wind, so sea-level rise and climate change might have consequences for flood protection. Our modelling results indicate that sea-level rise indeed increases erosion, but also that, up to a certain limit of rise, dunes are able to respond in a way that preserves their height and consequently their protective function. Simulations with reduced vegetation growth due to drought reveal a critical rate growth. If reduced below this limit, the dune’s ability to recover after storms declines. Although dunes can maintain themselves under moderate sea-level rise and drought, sand nourishments are required for preservation in developed areas.