Rivers: the land-coast connection
Gravel extraction, Waimakariri River, Canterbury. (Photo: above, Graham Fenwick, NIWA)
(Photo: above, Alistair McKerchar, NIWA)
NIWA scientists are developing models to predict the impact of changes in river sediment loads on coastal erosion. Rivers are a key connection between the land and the sea, carrying sand, gravel, and cobbles down river, and depositing them at the coast. This material is then redistributed and groundup by waves and currents.