Center Pivot Sprinkler Distribution Uniformity Impacts on the Spatial Variability of Evapotranspiration.
Saved in:
| Title: | Center Pivot Sprinkler Distribution Uniformity Impacts on the Spatial Variability of Evapotranspiration. |
|---|---|
| Authors: | Howes, Daniel J.1 djhowes@calpoly.edu, Ellenson, Sean2 sellenso@calpoly.edu, Hoffmann, Lucas3 ljhoffma@calpoly.edu, Gaudi, Franklin4 fgaudi@calpoly.edu |
| Source: | Journal of Irrigation & Drainage Engineering. Aug2015, Vol. 141 Issue 8, p1-10. 10p. |
| Subjects: | Evapotranspiration, Irrigation scheduling, Deficit irrigation, Sprinklers, Remote sensing, Reservoirs |
| Geographic Terms: | Palmdale (Calif.) |
| Abstract: | Understanding variable evapotranspiration (ET) throughout a field can help maximize yield on a per-acre basis, as well as assist with proper irrigation scheduling. The results from this study indicate that irrigation system distribution uniformity (DU) has a significant effect on the uniformity of ET during water-stressed periods. The study site involved intensely managed forage (alfalfa and winter grain hay) irrigated by center pivots being supplied with reclaimed water near Palmdale, California. During spring and early summer 2007 the center pivots were operating under deficit irrigation. In 2010, after the installation of reservoirs, water was applied to meet full evapotranspiration (ETc) demands. Using remote sensing of actual evapotranspiration, the variability in ETc for the same pivots with the same crop was quantified. During the non-water-stressed period, ET uniformity was significantly better than during the water-stressed period (2007). The difference in uniformity was found to be attributable to irrigation system distribution uniformity. For the 540 ha used in this study, irrigation system DU was found to explain 55% of the ET nonuniformity during deficit irrigation. A method to predict the nonuniformity in ET as a result of irrigation system DU and water-stress level is presented. [ABSTRACT FROM AUTHOR] |
| Copyright of Journal of Irrigation & Drainage Engineering is the property of American Society of Civil Engineers and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.) | |
| Database: | Engineering Source |
| FullText | Text: Availability: 0 |
|---|---|
| Header | DbId: egs DbLabel: Engineering Source An: 108413709 AccessLevel: 6 PubType: Academic Journal PubTypeId: academicJournal PreciseRelevancyScore: 0 |
| IllustrationInfo | |
| Items | – Name: Title Label: Title Group: Ti Data: Center Pivot Sprinkler Distribution Uniformity Impacts on the Spatial Variability of Evapotranspiration. – Name: Author Label: Authors Group: Au Data: <searchLink fieldCode="AR" term="%22Howes%2C+Daniel+J%2E%22">Howes, Daniel J.</searchLink><relatesTo>1</relatesTo><i> djhowes@calpoly.edu</i><br /><searchLink fieldCode="AR" term="%22Ellenson%2C+Sean%22">Ellenson, Sean</searchLink><relatesTo>2</relatesTo><i> sellenso@calpoly.edu</i><br /><searchLink fieldCode="AR" term="%22Hoffmann%2C+Lucas%22">Hoffmann, Lucas</searchLink><relatesTo>3</relatesTo><i> ljhoffma@calpoly.edu</i><br /><searchLink fieldCode="AR" term="%22Gaudi%2C+Franklin%22">Gaudi, Franklin</searchLink><relatesTo>4</relatesTo><i> fgaudi@calpoly.edu</i> – Name: TitleSource Label: Source Group: Src Data: <searchLink fieldCode="JN" term="%22Journal+of+Irrigation+%26+Drainage+Engineering%22">Journal of Irrigation & Drainage Engineering</searchLink>. Aug2015, Vol. 141 Issue 8, p1-10. 10p. – Name: Subject Label: Subjects Group: Su Data: <searchLink fieldCode="DE" term="%22Evapotranspiration%22">Evapotranspiration</searchLink><br /><searchLink fieldCode="DE" term="%22Irrigation+scheduling%22">Irrigation scheduling</searchLink><br /><searchLink fieldCode="DE" term="%22Deficit+irrigation%22">Deficit irrigation</searchLink><br /><searchLink fieldCode="DE" term="%22Sprinklers%22">Sprinklers</searchLink><br /><searchLink fieldCode="DE" term="%22Remote+sensing%22">Remote sensing</searchLink><br /><searchLink fieldCode="DE" term="%22Reservoirs%22">Reservoirs</searchLink> – Name: SubjectGeographic Label: Geographic Terms Group: Su Data: <searchLink fieldCode="DE" term="%22Palmdale+%28Calif%2E%29%22">Palmdale (Calif.)</searchLink> – Name: Abstract Label: Abstract Group: Ab Data: Understanding variable evapotranspiration (ET) throughout a field can help maximize yield on a per-acre basis, as well as assist with proper irrigation scheduling. The results from this study indicate that irrigation system distribution uniformity (DU) has a significant effect on the uniformity of ET during water-stressed periods. The study site involved intensely managed forage (alfalfa and winter grain hay) irrigated by center pivots being supplied with reclaimed water near Palmdale, California. During spring and early summer 2007 the center pivots were operating under deficit irrigation. In 2010, after the installation of reservoirs, water was applied to meet full evapotranspiration (ETc) demands. Using remote sensing of actual evapotranspiration, the variability in ETc for the same pivots with the same crop was quantified. During the non-water-stressed period, ET uniformity was significantly better than during the water-stressed period (2007). The difference in uniformity was found to be attributable to irrigation system distribution uniformity. For the 540 ha used in this study, irrigation system DU was found to explain 55% of the ET nonuniformity during deficit irrigation. A method to predict the nonuniformity in ET as a result of irrigation system DU and water-stress level is presented. [ABSTRACT FROM AUTHOR] – Name: AbstractSuppliedCopyright Label: Group: Ab Data: <i>Copyright of Journal of Irrigation & Drainage Engineering is the property of American Society of Civil Engineers and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.) |
| PLink | https://search.ebscohost.com/login.aspx?direct=true&site=eds-live&db=egs&AN=108413709 |
| RecordInfo | BibRecord: BibEntity: Identifiers: – Type: doi Value: 10.1061/(ASCE)IR.1943-4774.0000851 Languages: – Code: eng Text: English PhysicalDescription: Pagination: PageCount: 10 StartPage: 1 Subjects: – SubjectFull: Evapotranspiration Type: general – SubjectFull: Irrigation scheduling Type: general – SubjectFull: Deficit irrigation Type: general – SubjectFull: Sprinklers Type: general – SubjectFull: Remote sensing Type: general – SubjectFull: Reservoirs Type: general – SubjectFull: Palmdale (Calif.) Type: general Titles: – TitleFull: Center Pivot Sprinkler Distribution Uniformity Impacts on the Spatial Variability of Evapotranspiration. Type: main BibRelationships: HasContributorRelationships: – PersonEntity: Name: NameFull: Howes, Daniel J. – PersonEntity: Name: NameFull: Ellenson, Sean – PersonEntity: Name: NameFull: Hoffmann, Lucas – PersonEntity: Name: NameFull: Gaudi, Franklin IsPartOfRelationships: – BibEntity: Dates: – D: 01 M: 08 Text: Aug2015 Type: published Y: 2015 Identifiers: – Type: issn-print Value: 07339437 Numbering: – Type: volume Value: 141 – Type: issue Value: 8 Titles: – TitleFull: Journal of Irrigation & Drainage Engineering Type: main |
| ResultId | 1 |
