In terms of Auckland, the team reports that:<\/p>\n
“They found small shallow landslides to be common across most of the hills, with the occasional larger more impactful landslide. Rockfalls and landslides were frequent across the coastal cliffs of Auckland, with numerous buildings affected. Inland there are multiple buildings impacted by landslides.”<\/em><\/p>\n They have provided images of some of the landslides, including this one:-<\/p>\n A landslide in the Auckland area of New Zealand, triggered by the recent heavy rainfall. Image by the GNS Science landslide team, via GeoNet.<\/a><\/em><\/p><\/div>\n .<\/p>\n This is a fascinating landslide in its own right, with multiple source zones.\u00a0 The debris has coalesced into a channelised flow with a long runout.\u00a0 Note that the main channel is blocked and a small lake has formed.\u00a0 The timber on the site appears to have been felled comparatively recently.<\/p>\n There is a brilliant 3D model of this landslide<\/a> – a fantastic teaching resource.<\/p>\n In the Waikato and Bay of Plenty area, the GeoNet \/ GNS Science team has recorded c.160 landslides.\u00a0 They describe them thus:<\/p>\n “Many of the landslides around Tauranga Harbour occurred on steep coastal slopes composed of sedimentary deposits. Inland, most of the landslides were associated with road cuts, steep river valleys, forestry clearance, and weathered volcanic rock. Around the Coromandel Peninsula, the spatial occurrence of landslide activity was highly variable, but mostly concentrated in areas with sedimentary rocks, especially where forest cover was absent or where slopes had been steepened by roading or coastal erosion . In both Tauranga and Coromandel Peninsula, a small number of landslides occurred within native forest cover, associated with particularly steep slopes. Several slopes only partially failed, with large cracks visible above the landslide scars, or with partly displaced debris visible on the slopes. These \u2018incipient\u2019 landslides are likely to become sites of further slippage, especially in subsequent rainfall events.”<\/em><\/p>\n Again, there are some great images, including this one:<\/p>\n A landslide that blocked the Kaukaumoutiti Stream, northwest of Tauranga in New Zealand, triggered by the recent heavy rainfall. Image by the GNS Science landslide team, via GeoNet.<\/a><\/em><\/p><\/div>\n .<\/p>\n Once again this is a valley-blocking event.\u00a0 The failure appears to be rotational (note the partially displaced block).\u00a0 The underlying cause may have been undercutting the river – the location is on the outside of the bend, where erosion is highest.\u00a0 There is a beautiful 3D model of this landslide too,<\/a> which even captures the flow of water over the dam.<\/p>\n![\"A](\"https:\/\/blogs.agu.org\/landslideblog\/files\/2023\/02\/23_02-NZ-1.jpg\")
![\"A](\"https:\/\/blogs.agu.org\/landslideblog\/files\/2023\/02\/23_02-NZ-2.jpg\")