- Title
- A rare ocurrence of landslides initiated by an extreme event in March 2007 in the Alligator Rivers Region, Australia
- Creator
- Saynor, M. J.; Erskine, Wayne D.; Staben, G.; Lowry, J.
- Relation
- IAHS International Commission on Continental Erosion Symposium. Erosion and Sediment Yields in the Changing Environment: Proceedings of an IAHS International Commission on Continental Erosion Syposium (Chengdu, China 11-15 October, 2012) p. 303-310
- Relation
- http://iahs.info/Publications-News.do
- Publisher
- International Association of Hydrological Sciences (IAHS)
- Resource Type
- conference paper
- Date
- 2012
- Description
- The wettest water year on record al Jabiru Airport (2600 mm) in northern Australia occurred in 2006/07. A total of 1940 mm of rain fell in February and March 2007, with 737 mm occurring over 72 h between 28 February and 2 March. This rainfall and the associated flood event had return periods of at least 1:100 years on the annual maximum series. At least 49 landslides occurred on well vegetated, exhumed olivine dolerite surfaces surrounded by quartzosc sandstone in the East Alligator River drainage basin. The number, extent, morphometry and soil properties of the landslides were determined using remote sensing imagery, combined with field and laboratory measurements. No evidence of previous mass movements on dolerite was found. The frequency of these mass movements is certainly much rarer than 1:100 years. Mass movements have not previously been considered a significant sediment source in this area because of their truly rare occurrence.
- Subject
- mudslides; debris slides; landslide frequency; olivine dolerite; clay soils; extreme events
- Identifier
- http://hdl.handle.net/1959.13/1309174
- Identifier
- uon:21795
- Identifier
- ISBN:9781907161339
- Language
- eng
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