Not enough water in Victoria for any more dams.

Originally posted by Welkin31: ↑

for tinnitus or any reader -

Here is a link to a 2016 letter to a WA MP - a 3 page 500KB pdf it includes a 2002 press article exposing issues around thinning catchment bush--
http://www.warwickhughes.com/agri16/Hughes-Perth-dams-mar16.pdf

No water shortage forced seawater desal on Perth 27Feb2018--
http://www.warwickhughes.com/blog/?p=5608
6 points here with links.
[1] Get the best forestry advice and make a start managing catchment bush (press from 2002) to increase dam inflows for subsequent years. 94GL flowed into dams in 2017 despite over 20 years of catchment bush growth. The yield was 3% and that could easily be doubled with sensible catchment management run by forestry experts. Wow the extra water = Binningup desal!!
[2] Cut the Gnangara Pines and sell the timber – the timber was nowhere near as valuable as the groundwater the pines were suppressing. Labor had some sacred plan for a plywood factory. Replant the reserves with native bush – improve the Gnangara Mound water resource – point out this expansion of native bush to Greens.
[3] Begin exploiting the deeper Yarragadee groundwater – ignore “dog in the manger” whining from SW towns – the resource there is vast.
[4] Build the Agritech project to desalinate ~45GL PA of saline Wellington Dam water (~1/sixth saline as seawater) that was and has been wasted to the sea every year.
[5] Look to rivers such as the Swan, Murray, Harvey to site small dams to source saline water for desal parallel to the Agritech project. SW rivers waste ~1,000GL of weakly saline water to the sea every year – a minor proportion could be desalinated as demand required.1 and 2 would have eliminated the immediate need for the Kwinana seawater desal and 3, 4 & 5 would have replaced Binningup and taken care of expansion out past 2020.
[6] Looking further ahead the Agritech wheatbelt salinity reduction project with canals draining saline wheatbelt water to the coast – that water could be desalinated as required – on a scale of a doubling of the Perth water supply as well as steadily restoring wheatbelt land.See – Perth is not running out of water – water is running out of Perth.

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So he actually acknowledges the lessening of rainfall in the catchments . Fortunately the people in charge of Water services have got on with the job.

1) Dam inflows are also dependent on rainfall . Ask Warwick how rainfall has been going ?
2) Cut down trees , so they stop using underground water that is not being replenished by rainfall . Ask Warwick how rainfall has been going ?
3) Extract water from an aquafer that has some issues , with being recharged ( ignoring the As issues ). Ask Warwick how rainfall has been going that will recharge the mound.?
4) Damm - He is suggesting we need a Desal plant - Well tickle my ass with a feather!!
5) More desal -More feathers needed.
6) And yet more desal - Are you sure he thinks we dont need desal??

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