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Predicting fluvial-deltaic aggradation in Lake Roxburgh, New Zealand. Test of a Water and Sediment Routing Model

Research output: Chapter in Book/Report/Conference proceedingChapter

Standard

Predicting fluvial-deltaic aggradation in Lake Roxburgh, New Zealand. Test of a Water and Sediment Routing Model. / Robinson, Ruth Alison Joyce; Slingerland, R.

Geologic Modelling and Simulation - Sedimentary Systems. ed. / DF Merriam; JC Davies. Kluwer, 2001. p. 119-133.

Research output: Chapter in Book/Report/Conference proceedingChapter

Harvard

Robinson, RAJ & Slingerland, R 2001, Predicting fluvial-deltaic aggradation in Lake Roxburgh, New Zealand. Test of a Water and Sediment Routing Model. in DF Merriam & JC Davies (eds), Geologic Modelling and Simulation - Sedimentary Systems. Kluwer, pp. 119-133.

APA

Robinson, R. A. J., & Slingerland, R. (2001). Predicting fluvial-deltaic aggradation in Lake Roxburgh, New Zealand. Test of a Water and Sediment Routing Model. In DF. Merriam, & JC. Davies (Eds.), Geologic Modelling and Simulation - Sedimentary Systems (pp. 119-133). Kluwer.

Vancouver

Robinson RAJ, Slingerland R. Predicting fluvial-deltaic aggradation in Lake Roxburgh, New Zealand. Test of a Water and Sediment Routing Model. In Merriam DF, Davies JC, editors, Geologic Modelling and Simulation - Sedimentary Systems. Kluwer. 2001. p. 119-133

Author

Robinson, Ruth Alison Joyce ; Slingerland, R. / Predicting fluvial-deltaic aggradation in Lake Roxburgh, New Zealand. Test of a Water and Sediment Routing Model. Geologic Modelling and Simulation - Sedimentary Systems. editor / DF Merriam ; JC Davies. Kluwer, 2001. pp. 119-133

Bibtex - Download

@inbook{0e49d2413e764d7ba8896ea57aeed23e,
title = "Predicting fluvial-deltaic aggradation in Lake Roxburgh, New Zealand. Test of a Water and Sediment Routing Model",
abstract = "Sedimentation upstream of the Roxburgh Dam in central Otago, New Zealand, has created a delta of similar to50 x 10(6) m(3) since commissioning of the dam in 1956. Growth of the delta has decreased hydroelectric capacity and possibly aggravated flooding in the town of Alexandra at the upstream end of the lake. One mitigation strategy is to drop water levels in Lake Roxburgh during flood events and erode the delta, but it is difficult to know a priori how the system will behave under these conditions. Here, a coupled water/sediment routing model is proposed for heterogeneous size-density sediments (MIDAS) that predicts reasonably well temporal changes in bed elevations of up to 10 m and grain-size coarsening of almost an order of magnitude for a 33-year interval of delta growth and flushing. Model-data comparison also shows that the rate of downstream fining of the delta increases during aggradation, corroborating the suggestion of others that fining rates in ancient alluvial deposits reflect basin subsidence rates as well as distance to source terrain.",
keywords = "GRAIN-SIZE TRENDS, HETEROGENEOUS SEDIMENTS, MOVABLE BED, BASIN",
author = "Robinson, {Ruth Alison Joyce} and R Slingerland",
year = "2001",
language = "English",
isbn = "0306466759",
pages = "119--133",
editor = "DF Merriam and JC Davies",
booktitle = "Geologic Modelling and Simulation - Sedimentary Systems",
publisher = "Kluwer",

}

RIS (suitable for import to EndNote) - Download

TY - CHAP

T1 - Predicting fluvial-deltaic aggradation in Lake Roxburgh, New Zealand. Test of a Water and Sediment Routing Model

AU - Robinson, Ruth Alison Joyce

AU - Slingerland, R

PY - 2001

Y1 - 2001

N2 - Sedimentation upstream of the Roxburgh Dam in central Otago, New Zealand, has created a delta of similar to50 x 10(6) m(3) since commissioning of the dam in 1956. Growth of the delta has decreased hydroelectric capacity and possibly aggravated flooding in the town of Alexandra at the upstream end of the lake. One mitigation strategy is to drop water levels in Lake Roxburgh during flood events and erode the delta, but it is difficult to know a priori how the system will behave under these conditions. Here, a coupled water/sediment routing model is proposed for heterogeneous size-density sediments (MIDAS) that predicts reasonably well temporal changes in bed elevations of up to 10 m and grain-size coarsening of almost an order of magnitude for a 33-year interval of delta growth and flushing. Model-data comparison also shows that the rate of downstream fining of the delta increases during aggradation, corroborating the suggestion of others that fining rates in ancient alluvial deposits reflect basin subsidence rates as well as distance to source terrain.

AB - Sedimentation upstream of the Roxburgh Dam in central Otago, New Zealand, has created a delta of similar to50 x 10(6) m(3) since commissioning of the dam in 1956. Growth of the delta has decreased hydroelectric capacity and possibly aggravated flooding in the town of Alexandra at the upstream end of the lake. One mitigation strategy is to drop water levels in Lake Roxburgh during flood events and erode the delta, but it is difficult to know a priori how the system will behave under these conditions. Here, a coupled water/sediment routing model is proposed for heterogeneous size-density sediments (MIDAS) that predicts reasonably well temporal changes in bed elevations of up to 10 m and grain-size coarsening of almost an order of magnitude for a 33-year interval of delta growth and flushing. Model-data comparison also shows that the rate of downstream fining of the delta increases during aggradation, corroborating the suggestion of others that fining rates in ancient alluvial deposits reflect basin subsidence rates as well as distance to source terrain.

KW - GRAIN-SIZE TRENDS

KW - HETEROGENEOUS SEDIMENTS

KW - MOVABLE BED

KW - BASIN

M3 - Chapter

SN - 0306466759

SP - 119

EP - 133

BT - Geologic Modelling and Simulation - Sedimentary Systems

A2 - Merriam, DF

A2 - Davies, JC

PB - Kluwer

ER -

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ID: 183975