Abstract
This paper identifies the coastal and river borne sediment sources and serves as a background for future work that serve to investigate possible coastal prevention strategies to limit the amount of sediment influx towards the entrance of Wairoa River, thus promoting its stability. The Wairoa River, a barrier enclosed estuary situated in Hawke’s Bay, New Zealand was modelled using a one-dimensional hydrodynamic model – DYNLET. The potential rate of transport for silt, sand and gravel were investigated for both a flood flow and a median flow using the method devised by Van Rijn (J Hydraul Eng, 133(6):649–667, 2007a and J Hydraul Eng, 133(6):668–689, 2007b). The gravel found deposited at the entrance was deemed to have originated from a coastal source whereas the silt and sand were found to be a result of fluvial processes.
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Acknowledgements
This research would not have been possible without the generosity of Hawkes Bay Regional Council, in particular Neil Daykin for compiling and supplying river flow, rainfall and bathymetry data for Wairoa River. Many thanks to Dr. Richard Gorman from NIWA and Keith Rodel from the Port of Napier for additional data.
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Jia, Y., Yan, B. & Hinwood, J.B. Use of one-dimensional modelling in estuary management: sediment source. J Coast Conserv 18, 631–641 (2014). https://doi.org/10.1007/s11852-014-0335-y
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DOI: https://doi.org/10.1007/s11852-014-0335-y