Story: Floods

Silt layers (2nd of 2)

Silt layers

This pit was dug near the Ōroua River, downstream from the Kopane bridge. The scale is in centimetres. The top 15 centimetres is silt deposited by the flood in 2004, overlying dead grass from former pasture. Distinct silt layers can be seen lower down in the pit, indicating that flooding of the river plain occurs repeatedly and is part of the soil-forming process.

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Private collection
Photograph by Carolyn Hedley

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How to cite this page:

Eileen McSaveney, 'Floods - 21st century floods', Te Ara - the Encyclopedia of New Zealand, (accessed 3 December 2023)

Story by Eileen McSaveney, published 12 Jun 2006, reviewed & revised 1 Aug 2017