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Earthquake Hydrology and Liquefaction

As they flew along the newly formed Greendale Fault in September 2010, there were many things that Dr Simon Cox and his GNS Science colleagues could see were clearly awry during the first aerial reconnaissance.  But among the offset roads, bent hedgerows and fences, torn…

AUP Groundwater Take and Diversion

Introduction The Auckland Unitary Plan (AUP) introduced new regulations for groundwater take and diversion in the Auckland Region. Whilst the authors of the rules unquestionably had the correct intentions, the interpretation and application of the regulations has been overly conservative and lacking in context. The…

Groundwater control using slurry cut off walls in acidic soils

Groundwater control using slurry cut off walls in acidic soils

Abstract To facilitate the development of residential area a major upgrade of the storm water management system was required using open channels and flow attenuation ponds. The area is underlain by soft alluvial soils comprising organic silts, clays and peat. The high groundwater level and…