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Research papers, Lincoln University

High rise developments dominate skylines and are contentious in many low rise urban environments. Christchurch is no exception and its residents have historically been vocal in articulating their opinions on matters they care about, especially in regard to projects they perceive will ruin their ‘garden city’. At the turn of the millennium, developers were preparing yet another proposal which would get the tongues wagging in Christchurch with the development of the former Ferrymead Tavern site on Ferry Road. The planning process was a long and antagonistic one with many individuals viewing the built towers with a look of ‘disgust’ and discontent. In an ironic twist, the seismic activity in Christchurch over the last few years which has had major implications for a range of planning issues, incrementally led to the death of highly controversial Ferrymead ‘Water’s Edge’ Apartments.

Images, eqnz.chch.2010

The small wharf area of the now gone Pleasant Point Yacht Club has already been taken over by the Pied Shags (cormorants). It is under water now except for low tide. Note the dead pine tree in background. Many have died because of the salt water their roots are in.

Research papers, University of Canterbury Library

The majority of Christchurch’s stormwater has historically been discharged untreated directly into urban surface waterways. These receiving waterways have become adversely affected by the contaminants carried in the stormwater, particularly sediment and heavy metals. An event-based contaminant load model was developed to identify the distribution and magnitude of contaminant loads entering the waterway, as well as to assess the reduction in TSS and heavy metal loads that can be achieved by various stormwater management options. The GIS-Excel based model estimates contaminant loads from an individual storm event based on different contributing impervious surfaces and key rainfall characteristics (rainfall intensity, duration, pH and antecedent dry days). It then calculates contaminant reduction loads that could be achieved through source reduction (e.g. green roofs, repainting) as well as from treatment (e.g. raingardens, wet ponds) applied to different surfaces within the catchment. This model differs from other annual load models as it is event-based and accounts for storm characteristics in its calculation of contaminant loads. Christchurch is a valuable case setting due the unique opportunity for retrofitting improved stormwater management in the post-earthquake rebuild. It is anticipated that this modelling approach could later be adapted for use in other urban settings outside of Christchurch.

Images, eqnz.chch.2010

Burst water main causes flooding on the street after the magnitude 7.1 earthquake in Christchurch on Saturday 4-9-2010.

Images, eqnz.chch.2010

Burst water main causes flooding on the street after the magnitude 7.1 earthquake in Christchurch on Saturday 4-9-2010.

Images, eqnz.chch.2010

Burst water main causes flooding on the street after the magnitude 7.1 earthquake in Christchurch on Saturday 4-9-2010.

Images, eqnz.chch.2010

Burst water main causes flooding on the street after the magnitude 7.1 earthquake in Christchurch on Saturday 4-9-2010.

Images, eqnz.chch.2010

Burst water main causes flooding on the street after the magnitude 7.1 earthquake in Christchurch on Saturday 4-9-2010.

Images, eqnz.chch.2010

Burst water main causes flooding on the street after the magnitude 7.1 earthquake in Christchurch on Saturday 4-9-2010.

Images, eqnz.chch.2010

Burst water main causes flooding on the street after the magnitude 7.1 earthquake in Christchurch on Saturday 4-9-2010.

Images, eqnz.chch.2010

Burst water main causes flooding on the street after the magnitude 7.1 earthquake in Christchurch on Saturday 4-9-2010.

Images, eqnz.chch.2010

Burst water main causes flooding on the street after the magnitude 7.1 earthquake in Christchurch on Saturday 4-9-2010.