Affiliation:
1. School of Environment University of Auckland Auckland New Zealand
2. Gisborne District Council Gisborne New Zealand
Abstract
AbstractGisborne/Tairāwhiti is particularly susceptible to rainfall‐triggered landslides on account of (1) steep slopes, (2) young, soft geology, (3) landuse change effects. The interplay of these factors led to a particularly damaging rainfall‐induced landsliding event during 3–7 November 2021, following >200 mm of rainfall. This caused a Multiple Occurrence Regional Landslide Event, impacting residential properties and infrastructure in the city and rural areas. We report mainly on landslides in Gisborne city and suburbs, based on field reconnaissance and interferometric synthetic aperture radar monitoring of slopes. This highlights prevailing land instability prior to the more recent ex‐Tropical Cyclone Gabrielle (2023).
Subject
General Earth and Planetary Sciences,Geography, Planning and Development
Reference59 articles.
1. Beetham R. D. &Grant H.(2006).Reconnaissance of landslide and flood damage in the Gisborne area caused by the 2005 Labour Weekend storm. GNS Science Report 2006/022 35 p.
2. A new algorithm for surface deformation monitoring based on small baseline differential SAR interferograms
3. The post-glacial downcutting history in the Waihuka tributary of Waipaoa River, Gisborne district: Implications for tectonics and landscape evolution in the Hikurangi subduction margin, New Zealand
4. Bodeker G. Cullen N. Katurji M. McDonald A. Morgenstern O. Noone D. Renwick J. Revell L. &Tait A.(2022).Aotearoa New Zealand climate change projections guidance: Interpreting the latest IPCC WG1 report findings. Prepared for the Ministry for the Environment Report number CR 501 51 p.
5. Including informal housing in slope stability analysis – an application to a data-scarce location in the humid tropics