Quantcast

Sand, Salt Strangling Australia’s Greatest River

December 8, 2005

By James Grubel

GOOLWA, Australia — Richard Owen stands outside his old shack overlooking the mouth of the Murray River and laments the decline of Australia’s greatest waterway.

For 25 years, Owen has watched over the spot where the Murray meets the surf of the Southern Ocean, and has witnessed the sand slowly take control and close the river mouth.

“When we first came down here, we had wetlands in front of us,” Owen told Reuters as he looks out at a sandbank between his property and the river, now 220 yards away. “Now you can just walk up and across the sand. It’s just filled up.”

It is an undignified end to an once-mighty river system, which is now battling rising salinity, decreased water flows, the after-effects of drought and demands of irrigators.

The river is a lifeline in a parched continent, feeding water from the sub-tropical north down the Darling River, and from the eastern snow fields, where the Murray starts 1,550 miles from its final destination.

The Murray-Darling basin is also the nation’s food bowl, accounting for 41 percent of the value of Australia’s agricultural produce.

But so dire is the plight of the dwindling, polluted river system, the national government decided restoring it is a key environmental goal.

One aim is to try to increase the amount of water in the river to stop the mouth closing over.

Near its end, the Murray flows into two massive, shallow lakes before snaking around Hindmarsh Island on its way to the sea, at a place with a reputation as a notoriously dangerous stretch of water.

From his shack, Owen can see two dredgers that have operated without a break for three years to clear away 3.9 million cubic yards of sand so the Murray’s waters can make it to the ocean.

Without the dredging, or a significant increase in water flows, the water merely fills the low-lying lakes instead of being flushed out to sea.

AUSTRALIA’S MISSISSIPPI

Adelaide, the capital of South Australia state, draws 40 percent of its water from the river. The government says supplies from the Murray could be unfit to drink within 20 years for the city of about 1 million.

“Doing nothing is not an option,” said Wendy Craik, chief executive of the Murray-Darling Basin Commission, which manages the river on behalf of four state governments, the national government, farmers and environmentalists.

The Murray-Darling catchment covers 410,000 square miles — 15 percent of Australia’s landmass and an area the size of France and Spain combined — and plays a crucial role in supporting Australia’s economy and rural life. It also has a big place in the nation’s history.

Throughout the 19th and early 20th century, until rail took over, paddle steamers plied the river, transporting wool, wheat and goods from town to town, prompting writer Mark Twain in the 1880s to liken the river to America’s Mississippi.

During that period, farmers used the river water to irrigate crops, turning vast areas of arid lands into lush fields.

But so much has been taken out and so many areas stripped of trees that river flows are falling and salinity rising.

One company is producing gourmet River Murray salt flakes, reclaimed from what is supposed to be a freshwater river.

OLD MAN RIVER

Despite its size, the volume of water in the river is a fraction of some other major world rivers such as the Nile or the Amazon.

In an average year, 13,000 gigaliters of Murray water flows to the sea. One gigaliter is 1,000 million liters (quarts).

But after four years of drought, outflows are now down to an annual 5,000 gigaliters.

That might seem a lot of water, but it hardly compares to the 5.5 million gigaliters a year from the Amazon and 1 million gigaliters for the Yangtze.

Another problem is that the Murray is a slow and lazy river. Rainfall in the upper reaches of the Darling can take three months to make it to Goolwa, so it takes a long time for the river to flush out all the impurities.

In 2004, national and state government committed A$500 million to recover 500 gigaliters of water over five years to bolster environmental flows. Environmentalists, however, say the river needs an extra 1,500 gigaliters.

Salt projects up and down the river are also stopping 1,000 tons of salt a day from entering the system under a plan to stabilize salinity levels.

But more than a year on, the Murray Darling Basin Commission is still searching for an extra 260 gigaliters of water to meet its targets.

Owen has no doubt what has caused the river’s decline and what should be done.

“Bloody irrigators,” he said, complaining that rice and cotton farmers in the upstream states of Queensland and New South Wales are using too much water on crops unsuited to Australia.

“Everybody is taking too much. In a period of drought there’s not enough water for the irrigators, and certainly nothing left for the river.”

Owen has his own project. He has set up his own wetland sanctuary, returning 15 acres to native vegetation and encouraging native birds and wildlife to return.

“The river belongs to the community,” he says. “But to turn this around will take two generations.”


Source: reuters



comments powered by Disqus