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New study reveals colossal scale of riverbank erosion during Cyclone Gabrielle

Summary by NIWA
New study reveals colossal scale of riverbank erosion during Cyclone Gabrielle Mon, 25 Aug 2025 - 10:06 Over 220,000 m3 of sediment was eroded from just 9.1km of Ūawa/Hikuwai riverbanks in Gisborne (Tairāwhiti). This corresponds to 24 m3 of sediment for each metre of river channel, or around 1,500 dump truck loads for each 1 km. The researchers from Earth Sciences New Zealand and the University of Canterbury also observed major land losses, wit…
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NIWA broke the news in on Sunday, August 24, 2025.
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