A long record of mudslide movement at Waerenga-O-Kuri, New Zealand.

Abstract

A large mudslide on the east coast of the North Island of New Zealand has been monitored for 14 years. 13 lines of markers show a wide range of surface velocity profile shapes, from plug to strongly asymmetrical. Average surface velocity increases upslope as the slope angle increases from the tongue of the slide. A quasi-continuous record of movement at the lower end of the mudslide demonstrates that movement responds to both long-term and short- term variations in rainfall. The mudslide transports an average of about 44 m3/y of debris, and this is equivalent to a surface lowering of the catchment of about 90 mm/ky.-from Authors Show more