Basin & Surface Water Management Area: Wildman River
This section presents information about surface water quantity and sustainability. For simplicity of communication, sustainability measures are based on assessing the level of water use and/or allocation with the quantity of water required to fulfil a sustainable flow regime (environmental water provision) - this has been expressed as a sustainable yield.
|Mean Annual Run-Off (Natural) (ML/yr)||815,000|
|Mean Annual Outflow (Natural) (ML/yr)||815,000|
|In-stream commitment (Total available flow - imported water - sustainable yield) (ML)||755,000|
|Sustainable Yield - Developed Yield (ML)|
|Divertible Yield (ML/yr)||89,000|
|Developed Yield (ML/yr)||no data|
|Sustainable Yeild (ML/yr)||60,000|
|Yield, Security of Supply|
|Current Development Category||LOW DEVELOPMENT|
|Total Available Water||815,000|
Mean Annual Flow:
Mean Annual Flow for the SWMA was estimated using the mean annual flow from Gauge station G819001. A non-linear proportional area method as explained in the subsection titled 'Mean Annual Flow' in the NT Technical report was used to estimate the management area mean annual flow. The selected site is in the upper reaches of Alligator River and covers less than 7% of the management area. It is located in the low escarpment country. Most of the management area is basically a flat low lying country. Therefore the value of alpha in the non-linear proportional area method was assumed as 0.8.
Mean Annual Outflow:
The mean annual outflow is the same as the mean annual flow for the SWMA.
Not applicable as there is no infrastructure development using surface water.
Divertible Yield was estimated as 15% of the median annual flow of the management area because diversion from national park area is restricted. Please see general definition of Divertible Yield used in NT for this review in the section titled 'Divertible Yield' in the NT Technical Report.
Change in Flow Regimes:
The catchments within this SWMA are in natural condition.
Water use efficiency and optimisation strategies within existing infrastructure (eg. water supply efficiency, precision irrigation and scheduling, water recycling, trading and pricing) are part of the modern water resource development planning tool kit.
Recognising that water is a finite resource, the States and Territories have developed water allocation systems where security and reliability are assigned to entitlement, trading is provided so water can be moved to high value uses and the choices of individuals are maximised.
Measurement Stations in Wildman River
Summary surface water measurement station statistics
|Name||Stream gauge ID||Mean annual flow (ML/yr)||Mean annual flow (mm)|
|Stream guage 819001||819001||99,245||314|
|Stream guage 819072||819072||no data||no data|
Over 300 sites across Australia were modelled to predict the unimpaired (natural) stream-flow. The long time series of stream-flow data are important for both research and management of Australia's hydrological and ecological systems. A simple conceptual daily rainfall-runoff model was used to extend the stream-flow data.
The model estimates stream flow from daily runoff and potential evapotranspiration data. The parameters of the model are first calibrated against the available stream-flow data. The optimised parameter values are then used to estimate monthly stream flow from 1901 - 1998.
For further information please refer to : Project Report - Stream Flow Study
There are no stream flow sites for this region.
- Northern Territory Water Resources Assessment 2000 Technical Report
- report from the study of streamflow data and modelled streamflow
- Link to data available for download on the:
- extension of unimpaired monthly streamflow data and regionalisation of parameter values to estimate streamflow in ungauged catchments (NLWRA 2000)
- Surface Water Management Areas
- Link to the Map Maker to make a map using this information.
Links to an another web site
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