ASCE will be sunsetting the Civil Engineering Database (CEDB) in the coming months. We encourage you to start using the ASCE Library to perform content searches. In the ASCE Library, you can save your search results as well as receive email content alerts when new content relevant to your area of interest is published. Try it out today at https://ascelibrary.org.

 

Comparing Bowen Ratio-Energy Balance Systems for Measuring ET

by J. Ross Wight,
Clayton L. Hanson,
James L. Wright,



Document Type: Proceeding Paper

Part of: Management of Irrigation and Drainage Systems: Integrated Perspectives

Abstract:

Two Bowen ratio-energy balance (BREB) systems for measuring evapotranspiration (ET) under wet and dry conditions were compared. The study sites were an irrigated grass sod near Kimberly, Idaho and a sagebrushgrass range site on the Reynolds Creek Experimental Watershed near Boise, Idaho. One Bowen ratio system used positive-head, ceramic-wick, aspirated psychrometers. The other system measure the vapor gradients with a cooled-mirror, dew-point hygrometer. Differences in the amounts of ET measured by the two systems were very small and of little practical consequence. The system using a single-mirror, dew-point hygrometer was the most reliable, required the least maintenance, and was the easiest to use.

Subject Headings: Irrigation | Evapotranspiration | Water balance | Watersheds | Vegetation | System reliability | Rivers and streams | Idaho | United States

Services: Buy this book/Buy this article

 

Return to search