Open Access. Powered by Scholars. Published by Universities.®
Articles 1 - 2 of 2
Full-Text Articles in Engineering
First Long-Term, Direct Measurements Of Evapotranspiration And Surface Water Balance In The Nebraska Sandhills, David P. Billesbach, Timothy J. Arkebauer
First Long-Term, Direct Measurements Of Evapotranspiration And Surface Water Balance In The Nebraska Sandhills, David P. Billesbach, Timothy J. Arkebauer
Department of Biological Systems Engineering: Papers and Publications
The Nebraska SandHills is a vast grassland ecoregion that also serves as the main recharge zone for the High Plains (Ogallala) aquifer. Despite the national importance of this region in supplying irrigation water and supporting the US cattle industry, there have, until now, been no long-term, direct measurements of the components of the surface water balance. We have addressed this issue by installing energy balance/Bowen ratio (EBBR) flux towers in three key ecosystems. We report here the results of 7 years of measurements and interpret them in terms of annual weather variability. Additionally, these data have allowed us to make …
Evaluation Of The Impact Of Surface Residue Cover On Single And Dual Crop Coefficient For Estimating Soybean Actual Evapotranspiration, Lameck O. Odhiambo, Suat Irmak
Evaluation Of The Impact Of Surface Residue Cover On Single And Dual Crop Coefficient For Estimating Soybean Actual Evapotranspiration, Lameck O. Odhiambo, Suat Irmak
Department of Biological Systems Engineering: Papers and Publications
Single and dual crop coefficient methods are used in conjunction with grass reference evapotranspiration (ETo) to estimate actual crop evapotranspiration (ETc). However, the impact of soil surface residue cover on the accuracy of ETc estimated with these methods is not well understood. The objective of this study is to evaluate and compare the accuracy of the FAO-56 single crop coefficient (single-Kc) and dual crop coefficient (dual-Kc) methods for estimating soybean [Glycine max (L.) Merr.] ETc in a partially residue covered field. The study was conducted …