New high tide statistics for Christchurch are building understanding of the flood risk in tidal areas of the city, particularly the probability of high tides coinciding with significant rainfall events.
Engineering consultancy GHD Christchurch, in association with Netherlands-based flood risk experts HKV, put the statistics together using advanced analysis that looks at a range of things that influence sea levels. These include weather patterns, sea level rise and even the effects of wind and waves on the sea.
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