Balancing trade-off issues in land use change and the impact on streamflow and salinity management

Xiang Cheng, Kurt Benke, Craig Beverly, Brendan Christy, Anna Weeks, Kirsten Barlow, Mark Reid

Research output: Contribution to journalArticle

6 Citations (Scopus)

Abstract

The south-west region of the Goulburn-Broken catchment in the south-eastern Murray-Darling Basin in Australia faces a range of natural resource challenges. A balanced strategy is required to achieve the contrasting objectives of remediation of land salinization and reducing salt export, while maintaining water supply security to satisfy human consumption and support ecosystems. This study linked the Catchment Analysis Tool (CAT), comprising a suite of farming system models, to the catchment-scale CATNode hydrological model to investigate the effects of land use change and climate variation on catchment streamflow and salt export. The modelling explored and contrasted the impacts of a series of different revegetation and climate scenarios. The results indicated that targeted revegetation to only satisfy biodiversity outcomes within a catchment is unlikely to have much greater impact on streamflow and salt load in comparison with simple random plantings. Additionally, the results also indicated that revegetation to achieve salt export reduction can effectively reduce salt export while having a disproportionately smaller affect on streamflows. Furthermore, streamflow declines can be minimized by targeting revegetation activities without significantly altering salt export. The study also found that climate change scenarios will have an equal if not more significant impact on these issues over the next 70years. Uncertainty in CATNode streamflow predictions was investigated because of the effect of parameter uncertainty.
Original languageEnglish
Pages (from-to)1641-1662
Number of pages22
JournalHydrological Processes
Volume28
Issue number4
DOIs
Publication statusPublished - 2014
Externally publishedYes

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trade-off
land use change
streamflow
revegetation
catchment
salt
salinity
climate variation
salinization
farming system
targeting
remediation
natural resource
water supply
biodiversity
climate change
ecosystem
climate
prediction
basin

Cite this

Cheng, X., Benke, K., Beverly, C., Christy, B., Weeks, A., Barlow, K., & Reid, M. (2014). Balancing trade-off issues in land use change and the impact on streamflow and salinity management. Hydrological Processes, 28(4), 1641-1662. https://doi.org/10.1002/hyp.9698
Cheng, Xiang ; Benke, Kurt ; Beverly, Craig ; Christy, Brendan ; Weeks, Anna ; Barlow, Kirsten ; Reid, Mark. / Balancing trade-off issues in land use change and the impact on streamflow and salinity management. In: Hydrological Processes. 2014 ; Vol. 28, No. 4. pp. 1641-1662.
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Cheng, X, Benke, K, Beverly, C, Christy, B, Weeks, A, Barlow, K & Reid, M 2014, 'Balancing trade-off issues in land use change and the impact on streamflow and salinity management', Hydrological Processes, vol. 28, no. 4, pp. 1641-1662. https://doi.org/10.1002/hyp.9698

Balancing trade-off issues in land use change and the impact on streamflow and salinity management. / Cheng, Xiang ; Benke, Kurt; Beverly, Craig; Christy, Brendan; Weeks, Anna; Barlow, Kirsten ; Reid, Mark.

In: Hydrological Processes, Vol. 28, No. 4, 2014, p. 1641-1662.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Balancing trade-off issues in land use change and the impact on streamflow and salinity management

AU - Cheng, Xiang

AU - Benke, Kurt

AU - Beverly, Craig

AU - Christy, Brendan

AU - Weeks, Anna

AU - Barlow, Kirsten

AU - Reid, Mark

PY - 2014

Y1 - 2014

N2 - The south-west region of the Goulburn-Broken catchment in the south-eastern Murray-Darling Basin in Australia faces a range of natural resource challenges. A balanced strategy is required to achieve the contrasting objectives of remediation of land salinization and reducing salt export, while maintaining water supply security to satisfy human consumption and support ecosystems. This study linked the Catchment Analysis Tool (CAT), comprising a suite of farming system models, to the catchment-scale CATNode hydrological model to investigate the effects of land use change and climate variation on catchment streamflow and salt export. The modelling explored and contrasted the impacts of a series of different revegetation and climate scenarios. The results indicated that targeted revegetation to only satisfy biodiversity outcomes within a catchment is unlikely to have much greater impact on streamflow and salt load in comparison with simple random plantings. Additionally, the results also indicated that revegetation to achieve salt export reduction can effectively reduce salt export while having a disproportionately smaller affect on streamflows. Furthermore, streamflow declines can be minimized by targeting revegetation activities without significantly altering salt export. The study also found that climate change scenarios will have an equal if not more significant impact on these issues over the next 70years. Uncertainty in CATNode streamflow predictions was investigated because of the effect of parameter uncertainty.

AB - The south-west region of the Goulburn-Broken catchment in the south-eastern Murray-Darling Basin in Australia faces a range of natural resource challenges. A balanced strategy is required to achieve the contrasting objectives of remediation of land salinization and reducing salt export, while maintaining water supply security to satisfy human consumption and support ecosystems. This study linked the Catchment Analysis Tool (CAT), comprising a suite of farming system models, to the catchment-scale CATNode hydrological model to investigate the effects of land use change and climate variation on catchment streamflow and salt export. The modelling explored and contrasted the impacts of a series of different revegetation and climate scenarios. The results indicated that targeted revegetation to only satisfy biodiversity outcomes within a catchment is unlikely to have much greater impact on streamflow and salt load in comparison with simple random plantings. Additionally, the results also indicated that revegetation to achieve salt export reduction can effectively reduce salt export while having a disproportionately smaller affect on streamflows. Furthermore, streamflow declines can be minimized by targeting revegetation activities without significantly altering salt export. The study also found that climate change scenarios will have an equal if not more significant impact on these issues over the next 70years. Uncertainty in CATNode streamflow predictions was investigated because of the effect of parameter uncertainty.

KW - Climate change

KW - Dryland salinity

KW - Hydrological modelling

KW - Land use

KW - Murray-Darling Basin

KW - Streamflow

KW - Uncertainty

KW - hydrological modelling

KW - uncertainty

KW - dryland salinity

KW - land use

KW - streamflow

KW - climate change

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U2 - 10.1002/hyp.9698

DO - 10.1002/hyp.9698

M3 - Article

VL - 28

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EP - 1662

JO - Hydrological Processes

JF - Hydrological Processes

SN - 0885-6087

IS - 4

ER -