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The government of Victoria has legislation outlawing the construction of new dams which needs to be repealed as a matter of urgency to meet the needs of the environment. The response of cleared farmland to storm events is drastically different to that which occurs in natively vegetated catchments, such that the rivers we have today bear scant resemblance to the rivers of 200 years ago. Our rivers now flood faster and more often than they once did so that now the river beds are reduced to sterile rock and sands. The silts and clay fines in which bred, hid and prospered the micro animals of the riparian food chain have been scoured clean from the river beds. Some claim that damming these rivers is a sin against nature, but is it not a greater shame to overlook the state of the catchment feeding the river its flows.
What is Victoria to do if it is to rebuild its forests and save the Murray Darling Basin if it cannot review its no new dams setting. There is no doubt that there are a few rivers in its southern range which provide habitat for migratory fish and eel species but only a very few. The recent floods which tore through Lakes Entrance should bring into focus the terrific waste of allowing floodwaters to flow uselessly into the sea. With the amount of water that passed out the rivers' mouths, Victoria could have provided the water needs of the MDB for years.
How can Victoria offset its emission debts if it has no water to sequester carbon dioxide in its trees and its soils. Its agricultural productivity is plummeting and, so much so, there is much talk of abandoning the MDB for the greener pastures of the Northern Territory and northern W.A. The State is financially capable of constructing a number of new dams in the southern range and connecting them by pipelines to the dams supplying the MDB. Below you can view an image of the Victorian Gravity Loop. The Gravity Loop is a low cost means to link over 80% of the State's dams in a hydraulic circuit, so that water can be shared around the State. It is possible to move water around the hump separating the southern regions of the State from the MDB. With an ensemble of hydroelectric recharge pumping facilities this can be achieved without recourse to excessive energy usage. The orange line represents the lowest possible route having a maximum elevation of sub 100m, and so can operate by gravity alone whilst, the blue line represents a higher elevation route at a maximum of 220m, and the yellow line at a maximum of 330m, represents the pipeline the Victorian government currently has under construction.
We believe that the Victorian government has done the right thing in constructing the pipeline to interconnect Lake Eildon with the Melbourne water supply, but we think it should be viewed as a first step along the path which must be trod to truly regain control of the water supply of Victoria. We have a lot of empathy for those who oppose the current pipeline project, but ask them to consider it in the light of the larger pipeline proposal presented herein. With this more complete suite of pipelines, the damage they fear will not occur. The idea is to move water around the State to drought proof all including the greater environment.
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