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Geographic Area: Kapiti area 

Summary: This booklet supports the accompanying liquefaction hazard map sheets for the Kapiti area, which identify zones of liquefaction potential and liquefaction induced ground damage under two earthquake scenarios. The maps are compiled using geological data, ground shaking assessments, and historical records. The booklet is structured into eight parts: background information, map descriptions, types of ground damage, assessment methodology, limitations, data sources, earthquake scenarios, and geology and ground conditions.  

Section 3.5 discusses the liquefaction potential across the Kapiti area. There is a chance that liquefaction could occur in the Waikanae and Otaki areas during a moderate earthquake (Scenario 1). Past events suggest that loose sand found in floodplain areas may be the reason liquefaction has been observed there. In the case of a stronger earthquake (Scenario 2), the likelihood of liquefaction becomes more unpredictable. The report notes that there is no clear pattern in the geology that explains which areas are more likely to liquefy. Overall, the Kapiti area has a general potential for liquefaction during a strong earthquake, but whether it actually happens depends on the specific ground conditions at each site.