Thoms, Martin C; Parsons, Melissa

Author(s)

Thoms, Martin C

Parsons, Melissa

Publication Date

2003

Abstract

Alternate title for this publication: Environment flows for river systems. Selected papers from the Joint Meeting on Environmental Flows for River Systems and 4th International Ecohydraulics Symposium, Cape Town, March 2002.

Abstract

Many environmental flow approaches calculate hydrological indicators on an annual or daily basis and do not consider the multiple scales of a rivers' hydrological character. However, hydrologic processes operate within a temporal and spatial dimension, in accordance with multidimensional and hierarchical views of river systems. This study investigates spatial and temporal patterns of the hydrological character of a large river system, and examines the impact of water-resource development on these patterns. Over 300 regime, history and pulse-scale flow variables have been calculated from simulated discharge data representing 'reference' and 'current' water-resource development scenarios. Multivariate statistical analyses are used to identify measurement nodes with similar hydrological character and to determine the association between different temporal scale flow variables and groups of nodes. Six spatial hydrological zones are identified in the Condamine–Balonne River, Australia. These hydrological zones are found to have become homogenized with water-resource development. Different temporal scales of flow variables are related to the different hydrological zones, and to water-resource development scenarios. Thus, the temporal dimension of hydrological character is embedded within a spatial dimension of river zonation. Both dimensions should be considered in a hierarchical context, and environmental flow restoration targets may need to be set for each dimension of a river system.

Citation

River Research and Applications, 19(5-6), p. 443-457

ISSN

1535-1467

1535-1459

Link

https://hdl.handle.net/1959.11/31047

Publisher

John Wiley & Sons Ltd

Title

Identifying spatial and temporal patterns in the hydrological character of the Condamine-Balonne river, Australia, using multivariate statistics

Type of document

Conference Publication

Entity Type

Publication

Author(s)	Thoms, Martin C Parsons, Melissa
Publication Date	2003
Abstract	Alternate title for this publication: Environment flows for river systems. Selected papers from the Joint Meeting on Environmental Flows for River Systems and 4th International Ecohydraulics Symposium, Cape Town, March 2002.
Abstract	Many environmental flow approaches calculate hydrological indicators on an annual or daily basis and do not consider the multiple scales of a rivers' hydrological character. However, hydrologic processes operate within a temporal and spatial dimension, in accordance with multidimensional and hierarchical views of river systems. This study investigates spatial and temporal patterns of the hydrological character of a large river system, and examines the impact of water-resource development on these patterns. Over 300 regime, history and pulse-scale flow variables have been calculated from simulated discharge data representing 'reference' and 'current' water-resource development scenarios. Multivariate statistical analyses are used to identify measurement nodes with similar hydrological character and to determine the association between different temporal scale flow variables and groups of nodes. Six spatial hydrological zones are identified in the Condamine–Balonne River, Australia. These hydrological zones are found to have become homogenized with water-resource development. Different temporal scales of flow variables are related to the different hydrological zones, and to water-resource development scenarios. Thus, the temporal dimension of hydrological character is embedded within a spatial dimension of river zonation. Both dimensions should be considered in a hierarchical context, and environmental flow restoration targets may need to be set for each dimension of a river system.
Citation	River Research and Applications, 19(5-6), p. 443-457
ISSN	1535-1467 1535-1459
Link	https://hdl.handle.net/1959.11/31047
Publisher	John Wiley & Sons Ltd
Title	Identifying spatial and temporal patterns in the hydrological character of the Condamine-Balonne river, Australia, using multivariate statistics
Type of document	Conference Publication
Entity Type	Publication

Identifying spatial and temporal patterns in the hydrological character of the Condamine-Balonne river, Australia, using multivariate statistics

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