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<br />52
<br />
<br />RIO GRANCg COMPACT COMMISSION REPORT
<br />
<br />EVAPORATION AND PRECIPITATION
<br />
<br />The last paragraph of Article VI Ot the Compact states, in part,
<br />shall be reduced annually to compensate for evaporation losses in the
<br />or debits bear to the total amount of water in such reservoirs during
<br />
<br />Osuch credits and debits
<br />proportion that such credits
<br />the year."
<br />
<br />To provide the data needed for the computation of such evaporation losses, the Commission has
<br />encouraged the establishment and operation of evaporation stations near each major reservoir in the
<br />basin and at other selected locations.
<br />
<br />Evaporation and other climatological data collected at the several stations in Colorado and New
<br />Mexico are tabulated on the next page. At some of the stations, it was not possi~le to obtain
<br />evaporation records throughout the winter period.
<br />
<br />The measurements of evaporation were made in accordance with standard practice for the type of pan
<br />in use. Measurements of precipitation were made in standard 8-inch rain gaqes, which were
<br />supplemented at some of the stations by recording rain gages.
<br />
<br />Records for the evaporation stations at the State University, Elephant Butte Dam, and El Vado Dam
<br />antedated the creation of the Commission; the stations at Abiquiu Dam, Cochiti Dam, and Jemez
<br />Canyon Dam were established by the Corps of Engineers. All others were established at the request
<br />of the Commission.
<br />
<br />The Rio Grande Compact Commission gratefully acknowledges the cooperation of the National Oceanic
<br />and Atmospheric Administration, U.S. Corps of Engineers, and u.S. Bureau of Reclamation for
<br />furnishing the climatological records contained in this report.
<br />
<br />Alamosa Airport.--Lat 37027', long 105052", in Alamosa County at airport near Alamosa, Colo.
<br />Standard class A pan, anemometer, maximum and minimum thermometers, standard 8-inch and re-
<br />cording rain gages at elevation 7,536 ft.
<br />
<br />platoro Dam.--Lat 37021', long 106030', in Conejos County near Platoro, Colo. Standard class A
<br />pan, anemometer, maximum and minimum thermometers, fan type psychrometer, standard 8-inch and
<br />recording rain gages at elevation 9,826 ft.
<br />
<br />Heron Dam.--Lat 36040', long 106042', in Rio Arriba County about 4 mi. northeast of Heron Dam near
<br />T~erra Amarilla, N. Hex. Standard class A pan, maximum and minimum thermometers, and standard
<br />8-inch rain gage at elevation 7,310 ft.
<br />El Vado Dam.--Lat 36036', long 106044', in Rio Arriba County at El Vado Darn near Tierra Amarilla,
<br />N. Mex. Standard class A pan, anemometer, maximum and minimum thermometers, standard S-inch and
<br />recording rain gages at elevation 6,150 ft.
<br />Abiquiu Daro.--Lat 36014', long 106026', in Rio Arriba county at Abiquiu Dam near Abiquiu, N. Mex.
<br />Standard class A pan, maximum and minimum thermometers, standard 8-inch and recording rain gages
<br />at elevation 6,380 ft.
<br />
<br />Nambe Falls Dam.--Lat 35051', long 105054', in Santa Fe County at Nambe Falls Dam, N. Hex.
<br />Standard class A pan, maximum and ,minimum thermometers, recording thermograph, standard 8-inch
<br />and recording rain gages at elevation 6,840 ft.
<br />
<br />Cochiti Dam.--Lat 35038-, long 106019", in Sandoval County at operations building, at Cochiti Dam
<br />N. Hex. Standard class A pan, anemometer, maximum and minimum thermometers, standard S-inch and
<br />recording rain gages at elevation 5,560 ft.
<br />
<br />Jemez Canyon Darn.--Lat 35023', long 106032-, in Sandoval County at Jemez Darn, N. Hex. Standard
<br />class A pan, anemometer, maximum and minimum thermometers, standard S-inch and recording rain
<br />gages at elevation 5,3S8 ft.
<br />
<br />Elephant Butte Dam.--Lat 33009', long 107011', in Sierra County at Elephant Butte Dam, N. Mex.
<br />Standard class A pan, anemometer, maximum and minimum thermometers, and standard 8-inch rain
<br />gage at elevation 4,576 ft.
<br />Caballo Dam.--Lat 32054', long 10701S', in Sierra County at Caballo Dam, N. Hex. Standard class
<br />A pan, anemometer, maximum and minimum thermometers, standard a-inch and recording rain gages at
<br />elevation 4,190 ft.
<br />
<br />New Mexico State Universitv.--Lat 32017', long 106045', in Dona Ana County at University Park,
<br />N. Hex. Standard class A pan, anemometer, maximum and minimum thermometers, standard 8-inch and
<br />recording ~ain gages at elevation 3,8S1 ft.
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