Sunday, July 07, 2013

Wildfire ash poses risks for some NM farmers

Recent rains have given some relief to farmers in the Middle Rio Grande Valley of north-central New Mexico, but thunderstorms also have washed wildfire ash into the upper end of the Elephant Butte Irrigation District system in southern New Mexico. The Albuquerque Journal reports flash floods from the area burned by the Silver Fire in the Gila National Forest washed ash into the Rio Grande. Water managers issued a warning to downstream water users because of the risk the ash could clog farmers' drip irrigation systems and municipal treatment plants. Farmers installed drip irrigation to conserve water during the drought. The Middle Rio Grande Conservancy District, which serves farmers from Cochiti to Socorro County, released the last of its irrigation water from storage in El Vado Reservoir at midday June 30. With that water gone, the only water in the Rio Grande downstream from Cochiti Dam is federal water to meet Endangered Species Act requirements for the Rio Grande silvery minnow and water earmarked for Pueblo irrigators, who have earlier and higher-priority water rights. The conservancy district notified farmers Tuesday that it was cutting off deliveries to non-Indian farmers after July 4. The only way that will change, according to the district's announcement to its farmers, is if enough rain falls to raise river flows to allow irrigation with natural flows. While the week of afternoon and evening storms has helped slow the river's decline, there has not yet been enough water for the district to resume deliveries to non-Indian farmers. Downstream, the Elephant Butte Irrigation District continues to release the last of its irrigation water from Elephant Butte Reservoir. That is currently expected to end Saturday, according to Phil King, water management consultant to the irrigation district. Releases of Elephant Butte water for New Mexico and Texas farmers and cities since June 1 has drained Elephant Butte Reservoir to its lowest levels since the summer of 1972, according to Bureau of Reclamation records. The nearly depleted reservoir stands at 3 percent of its total capacity. The last time the reservoir was full was in 1995...more

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