Articles | Volume 20, issue 11
https://doi.org/10.5194/nhess-20-3161-2020
https://doi.org/10.5194/nhess-20-3161-2020
Research article
 | 
27 Nov 2020
Research article |  | 27 Nov 2020

Including informal housing in slope stability analysis – an application to a data-scarce location in the humid tropics

Elisa Bozzolan, Elizabeth Holcombe, Francesca Pianosi, and Thorsten Wagener

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Revised manuscript accepted for NHESS
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Cited articles

Almeida, S., Ann Holcombe, E., Pianosi, F., and Wagener, T.: Dealing with deep uncertainties in landslide modelling for disaster risk reduction under climate change, Nat. Hazards Earth Syst. Sci., 17, 225–241, https://doi.org/10.5194/nhess-17-225-2017, 2017. 
Anderson, M., Holcombe, L., Flory, R., and Renaud, J. P.: Implementing low-cost landslide risk reduction: A pilot study in unplanned housing areas of the Caribbean, Nat. Hazards, 47, 297–315, https://doi.org/10.1007/s11069-008-9220-z, 2008. 
Anderson, M. G.: Mid-Levels Study. Report on Geology, Hydrology and Soil Properties, Geotechnical Control Office, Civil Engineering Services Department, Hong Kong, 1982. 
Anderson, M. G.: Road-cut slope topography and stability relationships in St Lucia, West Indies, Appl. Geogr., 3, 105–114, https://doi.org/10.1016/0143-6228(83)90033-4, 1983. 
Anderson, M. G.: A feasibility study in mathematical modelling of slope hydrology and stability, Report, Geotechnical Control Office Civil Engineering Services Department, Hong Kong, 1990. 
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Short summary
We include informal housing in slope stability analysis, considering different slope properties and precipitation events (including climate change). The dominant failure processes are identified, and their relative role in slope failure is quantified. A new rainfall threshold is assessed for urbanised slopes. Instability rules are provided to recognise urbanised slopes most at risk. The methodology is suitable for regions with scarce field measurements and landslide inventories.
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