Water balance estimates from satellite observations over the Murray-Darling Basin

Guerschman, JP; Dijk, Aijm van; McVicar, TR; Niel, TG van; Li, L; Liu, Y; Peña‐Arancibia, Jorge L.

doi:10.4225/08/585ac5759d34a

2008

DOI: 10.4225/08/585ac5759d34a

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Water balance estimates from satellite observations over the Murray-Darling Basin

JP Guerschman¹,

Aijm van Dijk²,

TR McVicar³

et al.

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A conceptual model to estimate ungauged losses in river water accounting

Paydar¹,

Dijk

2011

Chan, F., Marinova, D. And Anderssen, R.S. (Eds) MODSIM2011, 19th International Congress on Modelling and Simulation.

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There is much uncertainty associated with water accounting in the complex lowland parts of the river systems across the Murray Darling Basin (MDB), where diversions and extractions, losses to flood plains and wetlands and groundwater recharge can all occur within the same reach and at the same time. Flood plain losses include water harvesting and overbank flow going to the wetlands and subsequently being evapotranspired. This water is generally not metered and hence there is no good quality historical data available. Monitoring and quantifying these losses are challenging. Modeling the processes causing these losses on the flood plain is an alternative way of quantifying these losses. This paper presents a simple water loss accounting model that tracks water and quantifies processes occurring on a flood plain in a river reach (Figure 1). These include diversions for irrigation, on-farm storage (OFS) and use, flood plain harvesting, overbank flow to the wetlands and return flow to the river. Given initial estimates of such parameters as irrigation efficiency, OFS volume and area, overbank flow threshold and fraction of return flows, optimum values of these parameters are found by minimising the residual error term for the water accounting period. The model attributes some of the unaccounted losses to flood plain water harvesting to the on-farm storages for later use, and estimates return flows from the wetlands and irrigation areas.

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A conceptual model to estimate ungauged losses in river water accounting

Paydar¹,

Dijk

2011

Chan, F., Marinova, D. And Anderssen, R.S. (Eds) MODSIM2011, 19th International Congress on Modelling and Simulation.

View full text Add to dashboard Cite

show abstract

River water balance accounts across the Murray-Darling Basin, 1990-2006

Kirby¹,

Dijk²,

Mainuddin³

et al. 2008

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Water balance estimates from satellite observations over the Murray-Darling Basin

Cited by 2 publications

References 0 publications

A conceptual model to estimate ungauged losses in river water accounting

A conceptual model to estimate ungauged losses in river water accounting

River water balance accounts across the Murray-Darling Basin, 1990-2006

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