Damage to the land along Anzac Drive in Bexley.
Cracks in the land next to the Avon River in Bexley. Anzac Drive bridge can be seen in the background.
Photograph captioned by BeckerFraserPhotos, "Telecom infrastructure which was damaged during a landslip on Reserve Terrace in Lyttelton".
Photograph captioned by BeckerFraserPhotos, "Footpath subsidence beside the Twin Towers monument, Kilmore Street".
A photograph captioned by BeckerFraserPhotos, "A view looking across the Avon River from Avonside Drive to River Road shows the degree of road subsidence".
The Avon River flooding New Brighton Road at high tide.
Damage to a bridge over the Avon River in Avonside. The bridge has pulled away from the bank, leaving large cracks between the concrete sides and the ground. The railing has also separated to the left.
The Avon River at high tide, along New Brighton Road.
The riverbank walkway along New Brighton Road, flooded at high tide due to ground subsidence.
The riverbank walkway along New Brighton Road, flooded at high tide due to ground subsidence.
Photograph captioned by BeckerFraserPhotos, "Subsidence under a concrete slab on St. David's Street, Lyttelton".
The Anzac Drive bridge. The path underneath has slumped quite dramatically and the abutment is severely warped.
The Pleasant Point Yacht Club flooded at high tide.
Photograph captioned by BeckerFraserPhotos, "At high tide the Avon River is flowing onto the road because the land has sunk below sea level".
Photograph captioned by BeckerFraserPhotos, "This is a very high tide in the Avon River, but shows how the danger of flooding has increased".
Photograph captioned by BeckerFraserPhotos, "Subsidence under the New Brighton Road electrical substation, a result of the extensive liquefaction in the eastern suburbs".
Photograph captioned by BeckerFraserPhotos, "New Brighton Road at this point is now below sea level at very high tide!".
Photograph captioned by BeckerFraserPhotos, "This is a very high tide in the Avon River, but shows how the danger of flooding has increased".
The Anzac Drive bridge. The path underneath has slumped quite dramatically and the abutment is severely warped.
Large cracks in the footpath in River Road, where the road has slumped towards the river. The photographer comments, "A bike ride around the CBD. River Rd subsidence".
A dock by the riverbank walkway alongside New Brighton Road which has been closed off to the public. The area has flooded at high tide due to ground subsidence".
Photograph captioned by BeckerFraserPhotos, "This is a very high tide in the Avon River, but shows how the danger of flooding has increased".
Road cones mark off a large crack in River Road, where the road has slumped towards the river. The photographer comments, "A bike ride around the CBD. River Rd subsidence".
This has made a huge mess for the residents to clean up. I heard on the news that homes have been damaged by subsidence in areas of earthquake-caused liquefaction like this.
Sandbags placed along the river bank to prevent flooding onto the road. The earthquake caused the ground in this area to subside , making it susceptible to flooding.
A damaged house in Avonside. The front of the house has sunk due to subsidence in the ground caused by liquefaction. Codes have been spray painted on the front window by the North Shore City Council rescue team.
A warning sign posted on River Road beside the Avon River reads "Health warning, contaminated water. Due to sewage overflows this water is unsafe for human contact and activity and is a public health risk. Please keep all people and pets out of contact with the water and do not cosume and seafood or shellfish collected from this area." The photographer comments, "A bike ride around the CBD. River Rd subsidence".
The Canterbury region of New Zealand experienced a sequence of strong earthquakes during 2010-2011. Responses included government acquisition of many thousands of residential properties in the city of Christchurch in areas with severe earthquake effects. A large and contiguous tract of this ‘red zoned’ land lies in close proximity to the Ōtākaro / Avon River and is known as the Avon-Ōtākaro Red Zone (AORZ). The focus of this study was to provide an overview of the floodplain characteristics of the AORZ and review of international experience in ecological restoration of similar river margin and floodplain ecosystems to extract restoration principles and associated learnings. Compared to pre-earthquake ground levels, the dominant trend in the AORZ is subsidence, together with lateral movement especially in the vicinity of waterway. An important consequence of land subsidence in the lower Ōtākaro / Avon River is greater exposure to flooding and the effects of sea level rise. Scenario modelling for sea level rise indicates that much of the AORZ is exposed to inundation within a 100 year planning horizon based on a 1 m sea level rise. As with decisions on built infrastructure, investments in nature-based ‘green infrastructure’ also require a sound business case including attention to risks posed by climate change. Future-proofing of the expected benefits of ecological restoration must therefore be secured by design. Understanding and managing the hydrology and floodplain dynamics are vital to the future of the AORZ. However, these characteristics are shared by other floodplain and river restoration projects worldwide. Identifying successful approaches provides a useful a source of useful information for floodplain planning in the AORZ. This report presents results from a comparative case study of three international examples to identify relevant principles for large-scale floodplain management at coastal lowland sites.