Floodplain construction by recent, rapid vertical accretion : Waipaoa River, New Zealand

Auteurs :
GOMEZ, B.
EDEN, D.N.
PEACOCK, D.H.
PINKNEY, E.J.

Description :
The rate of vertical accretion during eight floods in the Waipaoa River basin, with recurrence intervals of 5 to 60 years, was determined by relating the floodplain stratigraphy at Mc Phail's bend to the 1948-1995 flood history. The sequence of deposition is highly discontinuous, and the rapid vertical accretion is a response to a late 19th to early 20th century phase of deforestation in the headwaters that probably initiated a far greater change in suspended sediment yield than in discharge. Cross-section surveys conducted since 1948 indicate that the high suspended sediment load of the Waipaoa River also promoted in-channel deposition.


Type de document :
Article de périodique

Source :
Earth surface processes and landforms, issn : 0197-9337, 1998, vol. 23, n°. 5, p. 405-413, Collation : Illustration, Références bibliographiques : 25 ref.

Date :
1998

Editeur :
Pays édition : Royaume-Uni, Chichester, Wiley