Tue, Nov 14, 2017 - Page 7 News List

Rural areas at risk as water levels fall in massive aquifer

AP, DENVER, Colorado

The draining of a massive aquifer that underlies portions of eight states in the central US is drying up streams, causing fish to disappear and threatening the livelihood of farmers who rely on it for their crops.

The Ogallala’s water levels have been dropping for decades as irrigators pump water faster than rainfall can recharge it.

An analysis of federal data found the Ogallala aquifer shrank twice as fast over the past six years compared with the previous 60, the Denver Post reports.

The drawdown has become so severe that streams are drying at a rate of 10km per year and some highly resilient fish are disappearing.

In rural areas, farmers and ranchers worry they will no longer have enough water for their livestock and crops as the aquifer is depleted.

The aquifer lost 1.32 million hectare-meters of storage between 2013 and 2015, the US Geological Survey said in a June report.

“Now I never know, from one minute to the next, when I turn on a faucet or hydrant, whether there will be water or not,” said Lois Scott, 75, who lives west of Cope, Colorado, north of the frequently bone-dry bed of the Arikaree River.

A 12m well her grandfather dug by hand in 1914 gave water until recently, she said, lamenting the loss of lawns where children once frolicked and green pastures for cows.

Scott is now considering a move to Brush, Colorado, and leaving her family’s historic homestead farm.

“This will truly become the Great American Desert,” she said.

Also known as the High Plains Aquifer, the Ogallala underlies 453,000km2, including parts of Colorado, Wyoming Kansas, Nebraska, New Mexico, Oklahoma, South Dakota and Texas. That is one of the primary agricultural regions of the US, producing US$35 billion in crops annually.

Farmers and ranchers have been tapping into the aquifer since the 1930s to boost production and help them get by in times of drought.

However, overpumping has dried up 576km of surface rivers and streams across a 518km2 area covering eastern Colorado, western Kansas and Nebraska, according to researchers from Colorado State University and Kansas State University.

If farmers keep pumping water at the current pace, another 458km2 of rivers and streams would be lost before 2060, the researchers said.

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