Anatomy of a Landslide Dam
Автор: Earth Sciences New Zealand
Загружено: 2020-12-09
Просмотров: 343150
Landslide dams are a cascading hazard. Landslides themselves can impact people and property, but when their debris blocks streams and rivers, the dams and impounded reservoirs they form can pose a secondary hazard to people and infrastructure downstream, when they fail and release water and debris.
Last year the Kaiwhata landslide, located east of Wellington in the Wairarapa, created a dam and reservoir. Soon after its formation, the dam breached and the reservoir emptied, which sent a flood wave downstream inundating the area with water and debris. Last month the landslide reactivated following a heavy rain event, and formed a new landslide dam and impounded reservoir, which is still present (as at December 2020).
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