Landslip hazard modelling, Wellington Region, New Zealand.

By:

Hastie, Wayne J

Material type: Text

TextLanguage: ENG Publication details: 1989Description: 10 p. : illSubject: Work is in progress at the Wellington Regional Council to produce a landslip hazard map for the Wellington Region. The approach being used is the development of an empirical model relating known landslip sites with the terrain characteristics of that site. This modelling is being attempted using the ARC/INFO geographic information system. The main landslip data set has been derived from 1:12500 vertical air photos flown after a major storm in 1976. Other landslip data recorded from 1985 color infrared photos will be used to test the model. Terrain characteristics available on the system include slope angle, slope aspect, landform type, vegetation cover and soil type. Proximity to water courses is also being considered. Preliminary modelling for a test area of 150 square kilometres containing 856 slips indicated some relationships between the slip sites and slope angle, slope aspect, and landform type. Some of these results are presented together with comments on some of the assumptions, and unknowns associated with computer based terrain modelling

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Books	Australian Emergency Management Library	BOOK	711.0285 LAN (Browse shelf(Opens below))	Available		005730454

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Work is in progress at the Wellington Regional Council to produce a landslip hazard map for the Wellington Region. The approach being used is the development of an empirical model relating known landslip sites with the terrain characteristics of that site. This modelling is being attempted using the ARC/INFO geographic information system. The main landslip data set has been derived from 1:12500 vertical air photos flown after a major storm in 1976. Other landslip data recorded from 1985 color infrared photos will be used to test the model. Terrain characteristics available on the system include slope angle, slope aspect, landform type, vegetation cover and soil type. Proximity to water courses is also being considered. Preliminary modelling for a test area of 150 square kilometres containing 856 slips indicated some relationships between the slip sites and slope angle, slope aspect, and landform type. Some of these results are presented together with comments on some of the assumptions, and unknowns associated with computer based terrain modelling

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