Month: March 2017
This was my first go at finding a viable gravity-only route from a coastal river to the inland catchments. Gravity-feed is so important for keeping the cost of the water down. In this case, it flows into the Cooper Creek in the Galilee Basin that feeds into Lake Eyre from the Burdekin River at Hell’s Gate. This route goes via Lake Bradfield, currently a salt lake, which could serve as a temporary storage (about 14,000GL) and feed east to Adani Mine or other parts of the Bowen Basin, south to Lake Galilee and west to Muttaburra.
Soon I will get an actual route from Leon. I used http://plotaroute.com to develop a kml file of the route line, opened the kml file in Google Earth Pro (free) and captured the video with Fraps (Pro).
Note that Leon’s design is an integrated pipeline and levy. The levy would pick up fairly substantial flows along the way from the Cape River and the Campaspe River as well before it goes around the Thalanga Mine or Campaspe to head north up to the Basalt River. It gets a bit rough from there to Hell’s Gates and would need careful route planning, but even if it stops short at the Basalt River, Leon estimates it could catch and deliver maybe 2,000 – 3,000 GL or so per year to Aramac & Adani within 12 months. It then can later be connected to Hell’s Gate and deliver an extra 8,000 GL or so, then with the Herbert and Tully rivers add in another 3,000 GL or so.
The agricultural production alone from the irrigation of 2,000 km2 of land around Aramac and Muttaburra could be about $2 billion in produce per year. This plan has the benefits of lower cost (~$8 billion), and staged implementation without requiring the building of Hell’s Gate Dam.
COMING SOON: The 80 year old Bradfield scheme is a proposed world-class inland irrigation project that was designed to irrigate and drought-proof much of the north and western Queensland interior. The Scheme required large pipes, tunnels, and dams from the upper reaches of the Tully, Herbert and Burdekin rivers to feed the Thompson and Flinders rivers. Interest in the scheme has persisted in minor political parties, but studies have dismissed it as lacking in scientific justification, excessively expensive, and overly optimistic. Leon Ashby, with a history of broadacre irrigation and innovation, has solved the central problems in the original scheme and extended it to two larger schemes with much greater efficiencies and beneficial environmental impacts. Ashby’s plan is for an entirely gravity fed system, obviated the need for pumping water, harvesting flood flows and providing many additional irrigation dams en route. This would be achieved by siting high in the catchment an innovative 2000km contiguous aqueduct that would move the water gently from the highest dams at 800m elevation, over and through the Great Dividing Range plateau to dams at around 200m elevation in the central west. The holding capacity is expected to be 60,000 GigaL or three times the size of the Murray Darling Irrigation scheme. This would provide 30,000 GL per annum to irrigate approx 30,000 km2 of land, more than doubling the size of irrigated land in Australia. In addition the scheme has the ability to generate GWs of power, control and reduce the flooding flow of coastal rivers, and may reduce coral bleaching, excess nutrients and silt to the Great Barrier Reef from coastal farming and development. Along with other innovations from new technology, this would enable the realisation of the original Bradfield Scheme of opening up large swathes of fertile soil in central and western Queensland for fodder crops, cotton, and horticultural enterprises of all types, providing an estimated additional $50 billion dollars per annum to the Australian economy, along with jobs, revitalisation of rural communities, elimination of the droughts and flooding rains and creation of a world class irrigation scheme for rural Queensland.