SALSA Poster:

Estimation of Evaporation Rates for Riparian Vegetation, Hipps et al.

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	Estimation of Evaporation Rates for Riparian Vegetation
L.E. Hipps (1), D. Cooper (2), W. Eichinger (3) 1 Utah State University, Logan, UT 2 Los Alamos National Lab, Los Alamos, NM 3 University of Iowa, Iowa City, IA email: larry@claret.agsci.usu.edu

IMPORTANT ISSUE Water Use By Riparian Vegetation In Southwest US   PROBLEM Narrow and heterogeneous nature of corridor Typical micrometeorological approaches may be confounded by complex nature of surface

MICROMETEOROLOGICAL DIFFICULTIES Boundary layer will likely only partially develop over narrow, rough surface Large spatial variations in scalars and fluxes May be significant lateral fluxes of water vapor Available energy cannot be routinely measured

PROBLEM Standard micrometeorological approaches not very appropriate for this non-ideal situation GOAL To devise a legitimate approach for estimation of E in such a system

Summer 1997 -- SALSA Study Water Vapor Lidar Measures spatial distribution of atmospheric humidity Sited alternately east then west of zone Tethered Balloon Wind and temperature measured in lower 50 m with tethered balloon several times in study If winds blow across corridor and along Lidar transect, equation can be used to estimate E

SUGGESTIONS FOR FUTURE WORK Site towers at both sides of zone. Must be about 30 m tall Mount set of temperature, humidity, and wind sensors at 6-8 levels on each tower When winds blow across zone, equation can be solved for E

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