Predicting the effects of landuse change on water and salt balance—a case study of a catchment affected by dryland salinity in NSW, Australia

Tuteja, Narendra; Beale, Geoffrey; Dawes, Warrick; Vaze, Jai; Murphy, Brian; Barnett, Paul; Rančić, A.; Evans, Ray; Geeves, Guy; Rassam, Daud W.; Miller, Michelle

doi:10.1016/s0022-1694(03)00236-1

Cited by 54 publications

(26 citation statements)

References 41 publications

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“…Different tools are available to assess the spatial impact of reforestation on water resources and salinity (Van Dijk et al, this issue). These include, BC2C (Dawes et al, 2004), CATSALT (Tuteja et al, 2003), 2CSalt (Stenson et al, 2005), and the Framework for Land Use and Hydrology modelling (FLUSH; Gallant et al, 2005). In reviewing these different tools, Van Dijk et al (this issue) concluded that this generation of modelling tools are sufficient to assess the spatial impact of reforestation on streamflow and stream salinity at different scales.…”

Section: Discussionmentioning

confidence: 99%

Predicting the impact of plantation forestry on water users at local and regional scales

Brown

Podger

Davidson³

et al. 2007

Forest Ecology and Management

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Section: Discussionmentioning

confidence: 99%

Predicting the impact of plantation forestry on water users at local and regional scales

Brown

Podger

Davidson³

et al. 2007

Forest Ecology and Management

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“…The distribution method requires leakage rates for all landscape positions and land use combinations within the catchment. A vegetation efficiency index was developed by reference to published (Johnston et al, 1999;Paydar et al, 1999;Vertessy and Bessard, 1999;Ringrose-Voase and Cresswell, 2000) and modelling results from a nearby catchment with similar soils (Tuteja et al, 2003). The model FLOWTUBE is a Darcian concept-based groundwater flow model.…”

Section: Modelling Methodsmentioning

confidence: 99%

“…Note: L-Lucerne, P-Phalaris, N-Native, Y2/3-2/3 year crop rotation (from table II, Johnston et al, 1999); A: assumed efficiency ratio for annual and perennial pasture; B: simulated data from Ringrose-Voase and Cresswell (2000) averaged across 20 soil types and three climate zones; C: obtained from equations (1) and (2) of Vertessy and Bassard (1999); D: average of the simulated data from Tuteja et al, 2003. a Average of the simulated data from Tuteja et al, 2003. b Obtained from equations (1) and (2) of Vertessy and Bassard (1999 annual pasture is changed to trees, the predicted runoff volume will be lower because the runoff efficiency of trees p trees with respect to annual pasture is much lower, see Table II). …”

Section: Distributing Runoff To Source Areasmentioning

confidence: 99%

Modelling the effects of land‐use change on water and salt delivery from a catchment affected by dryland salinity in south‐east Australia

Vaze

Barnett

Beale

et al. 2004

Hydrological Processes

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Abstract:A comprehensive framework for the assessment of water and salt balance for large catchments affected by dryland salinity is applied to the Boorowa River catchment 1550 km 2 , located in south-eastern Australia. The framework comprised two models, each focusing on a different aspect and operating on a different scale. A quasi-physical semi-distributed model CATSALT was used to estimate runoff and salt fluxes from different source areas within the catchment. The effects of land use, climate, topography, soils and geology are included. A groundwater model FLOWTUBE was used to estimate the long-term effects of land-use change on groundwater discharge. Unlike conventional salinity studies that focus on groundwater alone, this study makes use of a new approach to explore surface and groundwater interactions with salt stores and the stream.Land-use change scenarios based on increased perennial pasture and tree-cover content of the vegetation, aimed at high leakage and saline discharge areas, are investigated. Likely downstream impacts of the reduction in flow and salt export are estimated. The water balance model was able to simulate both the daily observed stream flow and salt load at the catchment outlet for high and low flow conditions satisfactorily. Mean leakage rate of about 23Ð2 mm year 1 under current land use for the Boorowa catchment was estimated. The corresponding mean runoff and salt export from the catchment were 89 382 ML year 1 and 38 938 t year 1 , respectively. Investigation of various land-use change scenarios indicates that changing annual pastures and cropping areas to perennial pastures is not likely to result in substantial improvement of water quality in the Boorowa River. A land-use change of about 20% tree-cover, specifically targeting high recharge and the saline discharge areas, would be needed to decrease stream salinity by 150 µS cm 1 from its current level. Stream salinity reductions of about 20 µS cm 1 in the main Lachlan River downstream of the confluence of the Boorowa River is predicted.The FLOWTUBE modelling within the Boorowa River catchment indicated that discharge areas under increased recharge conditions could re-equilibrate in around 20 years for the catchment, and around 15 years for individual hillslopes.

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“…Catchment models were also developed to represent the hydrological processes and were successfully applied from experimental to large water resources scale. The Darling Range Catchment Model (DRCM) and the Large Scale Catchment Model (LASCAM) are the two recent examples (Mauger, 1986;Sivapalan et al, 1996;Viney et al, 2000;Viney and Sivapalan, 2001). An integrated modelling framework for the assessment of salt and water balance of a large dryland salinity affected catchment in the south-eastern part of Australia has been reported (Tuteja et al, 2003).…”

Section: Introductionmentioning

confidence: 99%

“…The Darling Range Catchment Model (DRCM) and the Large Scale Catchment Model (LASCAM) are the two recent examples (Mauger, 1986;Sivapalan et al, 1996;Viney et al, 2000;Viney and Sivapalan, 2001). An integrated modelling framework for the assessment of salt and water balance of a large dryland salinity affected catchment in the south-eastern part of Australia has been reported (Tuteja et al, 2003). Application of these models show that there are scope for improvement in the mathematical representation of the physical processes, particularly for the dynamic variations of the stream zone saturated areas and the mixing and distribution of salts brought about by rising groundwater to the stream zone.…”

Section: Introductionmentioning

confidence: 99%

A daily salt balance model for stream salinity generation processes following partial clearing from forest to pasture

Bari

Smettem

2006

Hydrol. Earth Syst. Sci.

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Abstract. We developed a coupled salt and water balance model to represent the stream salinity generation process following land use changes. The conceptual model consists of three main components with five stores: (i) Dry, Wet and Subsurface Stores, (ii) a saturated Groundwater Store and (iii) a transient Stream zone Store. The Dry and Wet Stores represent the salt and water movement in the unsaturated zone and also the near-stream dynamic saturated areas, responsible for the generation of salt flux associated with surface runoff and interflow. The unsaturated Subsurface Store represents the salt bulge and the salt fluxes. The Groundwater Store comes into play when the groundwater level is at or above the stream invert and quantifies the salt fluxes to the Stream zone Store. In the stream zone module, we consider a "free mixing" between the salt brought about by surface runoff, interflow and groundwater flow. Salt accumulation on the surface due to evaporation and its flushing by initial winter flow is also incorporated in the Stream zone Store. The salt balance model was calibrated sequentially following successful application of the water balance model. Initial salt stores were estimated from measured salt profile data. We incorporated two lumped parameters to represent the complex chemical processes like diffusion-dilutiondispersion and salt fluxes due to preferential flow. The model has performed very well in simulating stream salinity generation processes observed at Ernies and Lemon experimental catchments in south west of Western Australia. The simulated and observed stream salinity and salt loads compare Correspondence to: M. A. Bari (mohammed.bari@environment.wa.gov.au) very well throughout the study period with NSE of 0.7 and 0.4 for Ernies and Lemon catchment respectively. The model slightly over predicted annual stream salt load by 6.2% and 6.8%.

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Predicting the effects of landuse change on water and salt balance—a case study of a catchment affected by dryland salinity in NSW, Australia

Cited by 54 publications

References 41 publications

Predicting the impact of plantation forestry on water users at local and regional scales

Predicting the impact of plantation forestry on water users at local and regional scales

Modelling the effects of land‐use change on water and salt delivery from a catchment affected by dryland salinity in south‐east Australia

A daily salt balance model for stream salinity generation processes following partial clearing from forest to pasture

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