The Christchurch earthquake series caused widespread land damage across Christchurch City, including damage to the city’s waterways. Impacts on the city’s waterways included bed heave, settlement, liquefaction, and lateral spread of banks.
PDP completed a detailed drainage and ecological assessment for the Wairarapa and Wai-iti streams for both pre-earthquake and post-earthquake conditions. The assessment was based around the Christchurch City Council’s six-values values approach (drainage, ecological, cultural, landscape, recreational and heritage) to waterway management.