A Method of Estimating Steamflow Loss by Evapotranspiration from the Riparian Zone

Author: Reigner, Irvin C.

Source: Forest Science, Volume 12, Number 2, 1 June 1966 , pp. 130-139(10)

Publisher: Society of American Foresters

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Abstract:

Conservative values of daily streamflow loss by evapotranspiration from the riparian zone were obtained by hydrograph analysis. The two highest peaks of a series of diurnal fluctuations were connected by a straight line, representing the potential groundwater flow for a series of days between storm flows. The series should ideally be no longer than 5 days. After a sufficient number of daily riparian water losses were obtained, they were used as observations for the dependent variable in multiple-regression analysis. In this investigation, 62 samples, occurring during June, July, and August in 1955 and 1956, were used. An estimating equation was derived, using as predictor variables: (1) the one-half powers of mean daily streamflow in c.f.s., and (2) the one-half powers of weighted vapor-pressure deficit. The two individual variables were subsequently eliminated by their product interaction. The equation estimated riparian water loss with a relatively high degree of accuracy: 76 percent of the total variation was removed by the single complex variable.

Document Type: Journal article

Affiliations: 1: Research Forester, Forest Service, U.S. Dept. of Agric., Washington, D. C.

Publication date: 1966-06-01

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