ABSTRACT On 26th November 2017 a localised thunderstorm cell over the hills behind Roxburgh, Central Otago, produced up to an estimated 150mm of rain over a three-hour period. Four catchments experienced severe flooding and sediment movement (debris flows or debris floods), resulting in significant sediment…
ABSTRACT Regional-scale liquefaction susceptibility assessments have been completed for the Otago region. The assessment used an office-based evaluation of existing information, equating to a ‘Level A’ basic desktop assessment as per MBIE guidelines for liquefaction-prone land. Information sources included geological maps, landform and soil maps,…
Simon Nathan (s.nathan@xtra.co.nz) This article was previously published in the Geoscience Society of New Zealand Journal of the Historical Studies Group 68, January 2021 The Clyde Dam on the Clutha River (Fig. 1), which started generating power in 1993, was the last major hydro-electric scheme…
Figure 1: a) and b) Incision of the valley induces a progressive rotation of principal stress axes (σ1, σ3); c) once accumulated stress concentrated at the base of the slope exceeds the strength of the anisotropic rock, toe buckling deformation develops in the form of…
A disused 35m high quarry face bounds the access road and associated carpark for the LDS Church and the Frances Hodgkins retirement village. The access road has been affected by rockfalls from the basalt, breccia and volcanic ash layered cliff face, typically as a result…
