Water resources - Availability - Tasmania
Basin & Surface Water Management Area: Kingston Coast
Introduction
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.
Vital statistics:
| Mean Annual Run-Off (Natural) (ML/yr) | 262,879 |
|---|---|
| Mean Annual Outflow (Natural) (ML/yr) | 262,879 |
| In-stream commitment (Total available flow - imported water - sustainable yield) (ML) | 92,899 |
| Sustainable Yield - Developed Yield (ML) | 163580 |
| Divertible Yield (ML/yr) | 17,000 |
| Developed Yield (ML/yr) | 6,400 |
| Sustainable Yeild (ML/yr) | 169,980 |
| Yield, Security of Supply | |
| Current Development Category | LOW DEVELOPMENT |
| Diversion (ML/yr) | 6,400 |
| Total Available Water | 262,879 |
PLEASE NOTE:
Mean Annual Flow:
- Browns R scaled by area to subcatchment outlet.
- NW Bay scaled by area to subcatchment outlet.
- Snug Rvt scaled by area to subcatchment outlet.
- Snug Rvt yield used to estimate remainder of Basin yields (incl. Bruny Island) via areal scaling. (NB consideration was given to utilising rainfall as a weighting factor but there is insufficient information to adequately discriminate between Snug Rvt and Bruny Is. Rainfall).
Mean Annual Outflow:
Average annual flows described above were equated to the SWMA outlet by area scaling
Developed Yield:
Based on water useof 6411 ML rounded down to 6400 megalites per annum
Divertible Yield:
Divertible yield was taken from Review 85. Methods and assumtions used cannot be found and hence description cannot be made.
How has flow regime changed in Kingston Coast?
Change in Flow Regimes:
Browns Rivulet and NW Bay Rivulet have small headwater diversion structures. It is unclear what effect these have on low flows at this stage.
Trade and Transfer - a bit of give and take:
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 Kingston Coast
Summary surface water measurement station statistics
| Name | Stream gauge ID | Mean annual flow (ML/yr) | Mean annual flow (mm) |
|---|---|---|---|
| Browns River at Summerleas Road Bridge | 305200 | 133 | 12 |
| Snug Rivulet u/s Snug Tiers Road Bridge | 305202 | 185 | 11 |
| North West Bay Rivulet at Margate Water Supply Intake | 305201 | 1,286 | 15 |
Modelled unimpaired stream-flow sites in Kingston Coast
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.
Further information
- Tasmania 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.
Key
Links to an another web site
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