Modeling suspended sediment discharge from the Waipaoa River system, New Zealand: the last 3000 years

1 HydroTrend, a hydrologic-transport model, is used to simulate the water and suspended sediment discharge of the Waipaoa River system over the last 3 Kyr, a time period in which a well-documented sequence of natural events and anthropogenic activities that profoundly impacted drainage basin process...

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Bibliographic Details
Published in:Water resources research 2007-07, Vol.43 (7), p.n/a
Main Authors: Kettner, A.J, Gomez, B, Syvitski, J.P.M
Format: Article
Language:English
Subjects:
history
Hydro-Trend model
hydrologic models
hydrological modeling
hydrotrend
late holocene
precipitation
prediction
rivers
sediment deposition
sediment transport
sediment yield
stream flow
surface water
suspended sediment
topography
Waipaoa River
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Summary:1 HydroTrend, a hydrologic-transport model, is used to simulate the water and suspended sediment discharge of the Waipaoa River system over the last 3 Kyr, a time period in which a well-documented sequence of natural events and anthropogenic activities that profoundly impacted drainage basin processes occurred. Comparisons between observed and simulated data show that the model output replicates the frequency and distribution of flow events and the suspended sediment concentration-discharge relationship, and the long-term trends in suspended sediment discharge are consistent with the sediment record preserved on the middle shelf. Water discharge tracks precipitation, and average annual discharge may have been up to 20% higher and 6% lower at different times in the past. Suspended sediment discharge changed from 2.3 +/- 4.5 to 14.9 +/- 8.7 Mt yr(-1) during the Anthropocene, increasing by 140% after Polynesian arrival, by 350% after European colonization, and by 660% after the catchment headwaters were deforested.
ISSN:0043-1397
1944-7973
DOI:10.1029/2006WR005570