One of the negative aspects of sharing photos of the waterless Darling is that they could serve to 'normalise' our expectations for a river, and hence our practice of using the water for short term economic gains. With environmental and longer term concepts in mind - it is obviously the river that requires water for the continued survival of the river chanel itself and the billabongs and floodplains beside it.
Here are words from Thomas Mitchell describing the (fairly low) Darling River in 1835. The river he saw, called Baaka by the Bakindji people, was managed entirely with Aboriginal world views and attitudes to water use;
July 2nd: "The river and its vicinity presented much the same appearance here that they did 200 miles higher up. Similar lofty banks ... with marks of great floods traced in parallel lines on the clayey sides; ....transparent water, with acquaticplants - a slow current, with an equal volume of water - fine gum trees and an abundance of luxurious grasses."
August 4th: "We, during a sojourn of more than two months in the Australian wilderness, have been abundantly suplied with the finest water, from that extrordinary river which we had been tracing, and without which those regions would be deserts."