WRS-86
Evapotranspiration from Heterogeneous Mountain Meadows
Abstract
The evapotranspiration rates of irrigated mountain meadow grasses
were measured using non-weighing lysimeters during the 1979 and 1980
growing seasons. The lysimeters were located in a line across the
Little Laramie River Valley near Laramie, Wyoming. The 1967 version of
the Blaney-Criddle method for estimating evapotranspiration was
calibrated using the lysimeter data (TJSDA, SCS, 1967).
Lysimeters 1, 2, 3, 8, and 9 were located in areas that were not
irrigated. However, the Et rates measured by lysimeters 2, 3, and 9
were as great as Et rates measured by lysimeters in the irrigated
portion of the mountain meadows. The high water table in these non-irrigated
areas provided an extra source of water. The return flows
from irrigated areas appeared to provide the bulk of the ground water.
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