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Phreatophyte Water Use Estimated by Eddy-Correlation Methods

by H. L. Weaver, US Geological Survey, Denver, CO, USA,
E. P. Weeks, US Geological Survey, Denver, CO, USA,
G. S. Campbell, US Geological Survey, Denver, CO, USA,
D. I. Stannard, US Geological Survey, Denver, CO, USA,
B. D. Tanner, US Geological Survey, Denver, CO, USA,



Document Type: Proceeding Paper

Part of: Water Forum '86: World Water Issues in Evolution

Abstract:

Water-use was estimated for three phreatophyte communities: a saltcedar community and an alkali-Sacaton grass community in New Mexico, and a greasewood rabbit-brush-saltgrass community in Colorado. These water-use estimates were calculated from eddy-correlation measurements using three different analyses, since the direct eddy-correlation measurements did not satisfy a surface energy balance. The analysis that seems to be most accurate indicated the saltcedar community used from 58 to 87 cm (23 to 34 in. ) of water each year. The other two communities used about two-thirds this quantity.

Subject Headings: Water use | Vegetation | Salt water | Energy measurement | Alkalinity and acidity | Water supply | Evapotranspiration | United States | New Mexico | Colorado

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