Northern Colo. farmers welcome study aimed at 80 billion gallon issue — vegetation along the rivers
Many farmers and others applauded the recent signing of a bill aimed at addressing a major water issue in the region — vegetation along the rivers, which consumes about 40 percent as much water as all cities in northern Colorado combined, studies show.
Signed into law this month, Senate Bill 195, co-sponsored by Scott Renfroe, R-Eaton, allows the Colorado Water Conservancy Board to use funds for a two-year-plus study on the South Platte River watershed where it was impacted by the 2013 flood. The study will attempt to determine the relationship between high groundwater and increases in non-beneficial water consumption of phreatophytes — particularly non-native tamarisk, salt cedars, Russian olives and other such plants along rivers.
The bill also calls for developing a cost analysis for the removal of the unwanted phreatophytes in the South Platte Basin.
The final report is expected to be presented to the General Assembly by Dec. 31, 2016.
“The amount of plants along the river … and the amount of water we lose because of them … just gets worse and worse every year for us,” said Frank Eckhardt, a LaSalle-area farmer and member of the South Platte Roundtable — a group made up of water officials and experts in the region who convene monthly to discuss ways of solving the region’s future water gaps.
Eckhardt is also chairman of the board for the Western Mutual and Farmers Independent irrigation companies, which, combined, deliver water to about 15,000 acres of farmland in the LaSalle/Gilcrest areas.
Eckhardt said his ditch companies removed some vegetation along their ditches and saw improvements in those water supplies.
The bill talks of the CWCB working with Colorado State University and the Colorado Department of Agriculture on its study, and also notes funding for the study and report could come from unused dollars in an existing $1 million state fund.
“Rather than spend $1 million to study the problem, there’s a lot of us who’d rather see that $1 million go toward more quickly removing some of those plants,” Eckhardt added. “Still, this was a good step.”
A broader study of the South Platte basin, conducted last year by the Colorado Water Institute, showed that phreatophytes continue to increase, resulting in large quantities of non-beneficial consumptive water use — perhaps as much as 250,000 acre feet per year, or 80 billion gallons. According to 2010 Statewide Water Supply Initiative study, all of the South Platte Basin’s municipalities used a little over 600,000 acre feet.
That being the case, approval of the study comes as welcome news to many water users and water officials in the ag-intense South Platte River Basin, which includes all or portions of eight of the state’s top-10 ag-producing counties, in addition to many of the fastest growing cities in Colorado.
Many South Platte water users see invasive phreatophytes — deep-rooted plants that obtain water from permanent ground supplies or from the water table — as a major problem and potential threat to agriculture.
In all years, and especially in years like 2012 — one in which rainfall was at a record low, some farmers’ irrigation ditches were running dry and cities were having to watch their supplies closely — many agree some of that water could be going to a more beneficial use than quenching the thirst of vegetation along banks in the South Platte basin.
The Senate Bill 195 study won’t solve the problem, many acknowledge, but it represents another step in the right direction — although some still have questions about the bill.
“There’s still a lot of explanation needed regarding how the dollars will be spent, among other issues,” said Bob Streeter, a South Platte Roundtable member, and head of the roundtable’s phreatophyte committee. “We’re looking forward to having some of that explained to us.”
While Streeter acknowledges that phreatophytes are an issue, he, like others, questions how much water users would actually benefit in the long run if that vegetation was eradicated.
Streeter and others agree some kind of vegetation would be needed in place of the removed phreatophytes because root systems are necessary for keeping the river’s banks from eroding, and vegetation would be needed to provide habitats for wildlife in those areas and flood control.
The study isn’t the first step aimed at the phreatophytes issue.
Most recently, the Colorado Youth Corps Association and Colorado Water Conservation Board, a division of the Department of Natural Resources, is funding invasive plant species mitigation projects throughout Colorado in an effort to preserve and protect the state’s water resources. Five projects in 2014 — funded through a $50,000 grant from the CWCB — will be conducted by Colorado Youth Conservation Association-accredited youth corps in conjunction with local project sponsors in four counties throughout the state.
The projects are designed to control a variety of invasive phreatophyte plants. The Weld County Youth Conservation Corps, for example, will receive $15,000 to remove invasive vegetation from riverbanks and sandbars of the South Platte River.
The CWCB, local governments and organizations also have put together other efforts to limit the amount of vegetation that now lines the banks across the state — some of which are plants that couldn’t be found along the river a century ago.
With more thorough studies required and millions of dollars needed to help reduce the number of phreatophytes along rivers, no one is expecting immediate action that would significantly help address the looming water gap.
However, despite the uncertainties, recent years — like 2012 — serve as a reminder that water shortages are likely to be an issue down the road as the population grows in northern Colorado, and all possible solutions need to be thrown on the table to avoid the expected water-supply gap.
The Statewide Water Supply Initiative study estimates the South Platte River Basin alone could face a municipal and industrial water-supply gap of between 36,000 and 190,000 acre feet by 2050. ❖
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