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Web URL(s): | http://www.irrigation.org/IA/FileUploads/IA/Resources/TechnicalPapers/2016/SeasonalCurvesforTurfgrassUsingDualCoefficientMethod.pdf Last checked: 10/05/2017 Requires: PDF Reader |
Publication Type:
| Proceedings |
Author(s): | Crookston, Mark A. |
Author Affiliation: | P.E. and D.WRE and CAIS and CIC and CID and CIT and CLIA and Northern Water, Berthoud, CO |
Title: | Seasonal curves for turfgrass using dual coefficient method |
Section: | Turf Other records with the "Turf" Section
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Meeting Info.: | Las Vegas, Nevada: December 5-9 |
Source: | Irrigation Show 2016: Technical Session Proceedings. 2016, p. 1-12. |
Publishing Information: | [Falls Church, Virginia]: [Irrigation Association] |
# of Pages: | 12 |
Keywords: | TIC Keywords: Crop coefficient; Evaluations; Evapotranspiration; Seasonal variation; Water requirements
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Abstract/Contents: | "Seasonal crop coefficient or Kc curves were developed for ten turfgrasses at Berthoud, Colorado utilizing the FAO-56 dual crop coefficient method. Nine grasses were cool-season and one was warm season. Actual turf evapotranspiration or ET was measured by small weighing lysimeters, with four replicates of each turfgrass (40 lysimeters total). All were seeded in 2010. Daily lysimeter measurements of ET during three seasons (2011-2013) were compared to daily ETo calculated using the ASCE standardized reference evapotranspiration equation. The dual Kc method partitions ET into evaporation from wet soil/plant surfaces and transpiration from vegetation. This provides a substantially improved fit of simulated ET (using calculated ETo) to measured ET (from weighing lysimeters). The increased evaporation from wetted surfaces following a rain or irrigation event and the reduced transpiration resulting from soil moisture depletions are calculated on a day-to-day basis, not imbedded in averages as with the single Kc method. Consequently, developed Kc curves are not skewed by local rainfall frequency or irrigation management practices and are more readily transferable to other locations. The resultant seasonal Kc curves are expected to readily transfer to other similar locations and prove more accurate day-to-day than single Kc curves, particularly when rooting depths, frequency of rainfall, and/or irrigation management practices vary. The length of the four time periods within the seasonal curves can be readily adjusted to match localized plant growth and development." |
Language: | English |
References: | 11 |
Note: | Figures Tables Graphs |
| ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete): Crookston, M. A. 2016. Seasonal curves for turfgrass using dual coefficient method. p. 1-12. In Irrigation Show 2016: Technical Session Proceedings. Las Vegas, Nevada: December 5-9. [Falls Church, Virginia]: [Irrigation Association]. |
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| Web URL(s): http://www.irrigation.org/IA/FileUploads/IA/Resources/TechnicalPapers/2016/SeasonalCurvesforTurfgrassUsingDualCoefficientMethod.pdf Last checked: 10/05/2017 Requires: PDF Reader |
| MSU catalog number: b9924931 |
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