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Hydrologic analysis of the Rio Grande Basin north of Embudo, New Mexico; Colorado and New Mexico

Water-Resources Investigations Report 86-4113

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Abstract

Water yield was estimated for each of the five regions that represent contrasting hydrologic regimes in the 10,400 square miles of the Rio Grande basin above Embudo, New Mexico. Water yield was estimated as 2,800 cubic feet per second for the San Juan Mountains, and 28 cubic feet per second for the Taos Plateau. Evapotranspiration exceeded precipitation by 150 cubic feet per second on the Costilla Plains and 2,400 cubic feet per second on the Alamosa Basin. A three-dimensional model was constructed to represent the aquifer system in the Alamosa Basin. A preliminary analysis concluded that: (1) a seven-layer model representing 3,200 feet of saturated thickness could accurately simulate the behavior of the flow equation; and (2) the 1950 condition was approximately stable and would be a satisfactory initial condition. Reasonable modifications to groundwater withdrawals simulated 1950-79 water-level declines close to measured value. Sensitivity tests indicated that evapotranspiration salvage was the major source, 69 to 82 percent, of groundwater withdrawals. Evapotranspiration salvage was projected to be the source of most withdrawals. (USGS)

Additional Publication Details

Publication type:
Report
Publication Subtype:
USGS Numbered Series
Title:
Hydrologic analysis of the Rio Grande Basin north of Embudo, New Mexico; Colorado and New Mexico
Series title:
Water-Resources Investigations Report
Series number:
86-4113
Edition:
-
Year Published:
1988
Language:
ENGLISH
Publisher:
Dept. of the Interior, U.S. Geological Survey : Books and Open-File Reports [distributor],
Description:
vii, 244 p. :ill., maps ;28 cm.