Nevada Water Science Center


Evapotranspiration Studies in Nevada

Contact Information

Mike Moreo
Hydrologist
Phone: (702) 564-4625
Email:

 

Mailing Address
USGS
Nevada Water Science Center
160 N. Stephanie St.
Henderson, NV 89074

 

Nevada Water Science Center
Information

Home Page Surface Water Groundwater Water Quality Research Contact Us

 

 

SPV-3

Site identification: 385612114251601

Study contact: Michael Moreo

ET Data

Annual ET reported (in inches): 26.94

Study period: 9/01/05 - 8/31/06

Days recorded: 790 from 8/12/05 to 10/11/07

 

Measurement method: Eddy covariance

Data: Download from NWISWeb

Graph of ET data

Location information

Latitude,
in decimal degrees
Longitude,
in decimal degrees
Altitude
38.93667282 -114.4212338 5785

 

Photo of ET site

 

Photo of ET site

ET Source Area

Mixed grasses

 

Study Information

Evapotranspiration was measured at six eddy-correlation sites for a 1-year period between September 1, 2005, and August 31, 2006. Five sites were in phreatophytic shrubland dominated by greasewood, and one site was in a grassland meadow. The measured annual evapotranspiration ranged from 10.02 to 12.77 inches at the shrubland sites and 26.94 inches at the grassland site. Evapotranspiration rates correlated to measured vegetation densities and to satellite-derived vegetation indexes. Evapotranspiration rates were greater at sites with denser vegetation. The primary water source supporting evapotranspiration was water derived from local precipitation at the shrubland sites, and ground water at the grassland site. Measured precipitation, ranging from 6.21 to 11.41 inches, was within 20 percent of the computed long-term annual mean. The amount of ground water consumed by phreatophytes depends primarily on local precipitation and vegetation density. The ground-water contribution to local evapotranspiration ranged from 6 to 38 percent of total evapotranspiration at the shrubland sites, and 70 percent of total evapotranspiration at the grassland site. Average depth to water ranged from 7.2 to 32.4 feet below land surface at the shrubland sites, and 3.9 feet at the grassland site. Water levels declined throughout the growing season and recovered during the non-growing season. Diurnal water-level fluctuations associated with evapotranspiration were evident at some sites but not at others.

 

Study Publication: SIR 2007-5078

 

 

 

Accessibility FOIA Privacy Policies and Notices

Take Pride in America logo USA.gov logo U.S. Department of the Interior | U.S. Geological Survey
Page Contact Information: Nevada Water Science Center Web Team
Page Last Modified: January 21, 2016 -->