Nevada Water Science Center

Evapotranspiration Studies in Nevada

Contact Information

Mike Moreo
Phone: (702) 564-4625


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


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Bulrush marsh

Site identification: 401334115280401

Study contact: David Berger

ET Data

Annual ET reported (in inches): 50.24

Study period: 10/01/99 - 9/30/00

Days recorded: 542 from 5/21/99 to 11/13/00


Measurement method: Bowen ratio

Data: Download from NWISWeb

Location information

in decimal degrees
in decimal degrees
40.2261111111 -115.467777778 5964


Photo of ET site


ET Source Area

Medium-density cover to dense bulrush and cattails


Study Information

The Bowen-ratio method was used to estimate daily ET at four sites: over open water, in a moderate-to-dense cover of bulrush marsh, in a moderate cover of mixed phreatophytic shrubs, and in a desert-shrub upland. The eddy-correlation method was used to estimate daily ET for periods of 2 to 12 weeks at a meadow site and at four sites in a sparse-to-moderate cover of phreatophytic shrubs. Daily ET rates ranged from less than 0.010 inch per day at all of the sites to a maximum of 0.464 inch per day at the open-water site. Average daily ET rates estimated for open water and a bulrush marsh were about four to five times greater than in areas of mixed phreatophytic shrubs, where the depth to ground water is less than 5 feet. Based on the seasonal distribution of major habitats in the refuge and on winter and summer ET rates, an estimated total of about 89,000 acre-feet of water was consumed by ET during October 1999-September 2000 (2000 water year). Of this total, about 49,800 acre-feet was consumed by ET in areas of open water and bulrush marsh.


Study Publication: WRIR01-4234




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