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CANTERBURY EARTHQUAKES 2010/2011 PORT HILLS SLOPE STABILITY: GEOMORPHOLOGY MAPPING FOR ROCKFALL RISK ASSESSMENT (2012)

Christchurch City Council requested GNS Science to carry out geomorphic mapping of the near-surface materials and processes present in the Port Hills of Christchurch. The purpose of this work is to provide information relating to near-surface geological materials and the geomorphic processes that formed them. These data are needed as inputs to the rockfall hazard and risk assessments currently being carried out by GNS Science for Christchurch City Council. This document and the accompanying maps provide the results of the geomorphic mapping of rockfall hazard zones for the Port Hills identified by GNS Science (Massey et al. 2012a,b). The area has been mapped in detail (at a scale of about 1:500) using aerial photograph mosaics and satellite images, with limited field verification. Three attributed Geographic Information System (GIS) layers contained within a geodatabase have been produced: two polygon layers [interpreted materials and genesis] and a polyline layer [morphology], digitised directly from aerial photograph mosaics and satellite images. This report contains explanatory descriptions and photographs of the mapping units in the GIS layers, and copies of the maps produced.
Reference:
GNS Science Consultancy Report 2012/15. 21 p + maps (91 p)
Organization:
GNS Science Consultancy
New Zealand
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