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dc.contributor.authorNiaghi, Ali Rashid
dc.description.abstractAs the main component of terrestrial energy and water balance, evapotranspiration (ET) moves a large amount of water and energy in the form of latent heat flux from bare soil and vegetated surfaces into the atmosphere. Despite the development of many methods and equations through past decades, accurate ET estimation is still a challenging task, especially for the Red River Valley of the North (RRV) that has limited updated information on ET either for landscape or agricultural water management. The overall objective of first study was to evaluate the ASCE-EWRI reference ET (ETo) method by developing an accurate crop coefficient (Kc) using an eddy covariance (EC) system over an unirrigated turfgrass site. The results showed that with mean ETgrass/ETo ratio as 0.96 for the entire growing seasons of turfgrass, the ASCE-EWRI ETo method is valid for guiding the turfgrass irrigation management in cold climate conditions. In a Controlled drainage with subirrigation (CD+SI) field, an EC system was used to measure and quantify energy flux components along with soil water content (SWC) and water table depth (WTD) measurements during four corn growing. This study showed that the subsurface drainage along with the CD + SI system can be used for optimal water management with an improvement of 26.7% and 6.6% of corn yield during wet and dry year, respectively. For the final task, ET was measured using EC, Bowen ratio system (BREB), and soil water balance (SWB) method during the corn growing season. The comparison of the EC and the BREB system illustrated the advantages of using the residual method to close the energy balance closure of EC. Among the different time approaches for SWB method, ET by the SWB method using the average soil water contents between 24:00 to 2:00 time period showed non-significant differences (alpha = 0.05) compared to the BREB system during the observation periods.en_US
dc.publisherNorth Dakota State Universityen_US
dc.rightsNDSU policy 190.6.2en_US
dc.titleAdvanced Evapotranspiration Measurement for Crop Water Management in the Red River Valleyen_US
dc.typeDissertationen_US
dc.typeVideoen_US
dc.date.accessioned2020-11-10T22:45:39Z
dc.date.available2020-11-10T22:45:39Z
dc.date.issued2019
dc.identifier.urihttps://hdl.handle.net/10365/31644
dc.subjectBowen ratio energy balanceen_US
dc.subjectcrop coefficienten_US
dc.subjecteddy covarianceen_US
dc.subjectevapotranspirationen_US
dc.subjectsoil water balanceen_US
dc.subjectupward fluxen_US
dc.identifier.orcid0000-0002-4301-4125
dc.description.sponsorshipUSDA National Institute of Food and Agriculture projecten_US
dc.description.sponsorshipUSDA NCR SARE projecten_US
dc.description.sponsorshipND Soybean Councilen_US
dc.description.sponsorshipND Water Resources Research Instituteen_US
dc.description.sponsorshipND Agricultural Experimental Stationen_US
dc.description.sponsorshipUSDA Hatch projecten_US
dc.description.sponsorshipNASA ROSES Projecten_US
dc.rights.urihttps://www.ndsu.edu/fileadmin/policy/190.pdfen_US
ndsu.degreeDoctor of Philosophy (PhD)en_US
ndsu.collegeAgriculture, Food Systems and Natural Resourcesen_US
ndsu.departmentAgricultural and Biosystems Engineeringen_US
ndsu.programAgricultural and Biosystems Engineeringen_US
ndsu.advisorJia, Xinhua


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