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


Nevada Water Science Center

Home Page Surface Water Groundwater Water Quality Research Contact Us



Topock Marsh SC

Site identification: 344827114320201

Study contact: Craig Westenburg

ET Data

Annual ET reported (in inches): 42.6

Study period: 6/01/02 - 5/31/04

Days recorded: 755 from 5/23/02 to 6/16/04


Measurement method: Bowen ratio

Data: Download from NWISWeb

Graph of ET data

Location information

in decimal degrees
in decimal degrees
34.8075 -114.533888889 460


Photo of ET site


Photo of ET site

ET Source Area

High-density saltcedar


Study Information

This study was done to improve the accuracy of methods used to estimate phreatophytic ET. ET data were collected at three Bowen-ratio stations at Havasu National Wildlife Refuge, 2002–04. A saltcedar (SC) ET station was installed in a large area of medium-to-high density, homogeneous saltcedar.

Daily ET for the SC station, computed using modified ET coefficients, was compared to Bowen-ratio ET and had a correlation coefficient of 0.92 for 754 days (May 23, 2002–June 14, 2004), with large differences for many days. Monthly ET compared for 24 months (June 2002–May 2004) had a correlation coefficient of 0.99.


Study Publication: SIR 2006-5043




Accessibility FOIA Privacy Policies and Notices

Take Pride in America logo 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 -->