Water Application Efficiency and Adequacy of ET-Based and Soil Moisture–Based Irrigation Controllers for Turfgrass Irrigation
Publication: Journal of Irrigation and Drainage Engineering
Volume 139, Issue 2
Abstract
Increasing competition for water and the desire for high-quality turfgrass require sound irrigation water management. The main objective of this study was to evaluate two types of commercially available irrigation control technologies: one based on evapotranspiration (ET) estimates and the other based on feedback from a soil-moisture sensor (SMS). Irrigation treatments were combinations of controller technology: a timer-based standard controller system (TIM), an add-on (1 set point) SMS system (SMS1), and an evapotranspiration (ET)-based system (ETB), and watering frequency: weekly, twice per week, and daily (1, 2, and 7 days per week, respectively) plus a 10th treatment of an on-demand (2 set point) SMS system (SMS2). Both irrigation efficiency and adequacy were best for the SMS2 treatment when averaged over all three years. The SMS1 treatment provided good irrigation efficiency, but irrigation adequacy suffered, most noticeably with the twice per week treatment. The ET treatment provided good irrigation adequacy, but had the poorest irrigation efficiency. SMS treatments resulted in average water savings of 39% in SMS1 treatments and 24% in the SMS2 treatment compared to the timer-based treatments, whereas the ET treatments applied 11% more water, on average, than the timer-based treatments. The weekly SMS1 treatment applied the least amount of water (), whereas the twice per week ET treatment applied the most water ().
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Acknowledgments
Funding for this project was provided by the North Carolina Center for Turf Research and Education.
References
Allen, R. (2003). REF-ET: Reference evapotranspiration calculation software for FAO and ASCE standardized equations. Version 2.01.17, University of Idaho, Moscow, ID.
Allen, R. G. (1997). “Demonstration of potential for residential water savings using a soil-moisture controlled irrigation monitor.” Project Completion Report, Project, United States Bureau of Reclamation, Provo, Utah.
Allen, R. G., Pereira, L. S., Raes, D., and Smith, M. (1998). “Crop evapotranspiration—Guidelines for computing crop water requirements.”, Food and Agriculture Organization of the United Nations, Rome.
Beard, J. B. (1973). Turfgrass: Science and culture, Prentice Hall, Englewood Cliffs, NJ.
Bennett, O. L., and Doss, B. D. (1960). “Effect of soil moisture level on root distribution of cool-season forage species.” Agron. J., 52(4), 204–207.
Bot, A., and Benites, J., eds. (2005). “Drought-resistant soils—Optimization of soil moisture for sustainable plant production.” Proc. of the Electronic Conf. Organized by the FAO Land and Water Development Division, Food and Agriculture Organization of the United Nations, Rome.
Bruneau, A. H., Miller, G. L., and Peacock, C. H., eds. (2008). Carolina lawns, North Carolina Cooperative Extension Service, Raleigh, NC.
Cardenas-Lailhacar, B., Dukes, M. D., and Miller, G. L. (2005). “Sensor based control of irrigation in bermudagrass.”, St. Joseph, MI.
Cardenas-Lailhacar, B., Dukes, M. D., and Miller, G. L (2008). “Sensor-based automation of irrigation on bermudagrass, during wet weather conditions.” J. Irrig. Drain. Eng., 134(2), 120–128.
Cardenas-Lailhacar, B., Dukes, M. D., and Miller, G. L (2010). “Sensor-based automation of irrigation on bermudagrass, during dry weather conditions.” J. Irrig. Drain. Eng., 136(3), 184–193.
Davis, S., Dukes, M. D., and Miller, G. L (2009). “Landscape irrigation by evapotranspiration-based irrigation controllers under dry conditions in southwest Florida.” Agric. Water Manage., 96(12), 1828–1836.
Doss, B. D., Ashely, D. A., and Bennett., O. L. (1960). “Effect of soil moisture regime on rooting distribution of warm-season forage species.” Agron. J., 52(10), 569–572.
Ervin, E. H., and Koski, A. J. (1998). “Drought avoidance aspects and crop coefficients of Kentucky bluegrass and tall fescue turfs in the semi-arid west.” Crop Sci., 38(3), 788–795.
Evans, R. O., Sneed, R. E., and Cassel, D. K. (1991). “Irrigation scheduling to improve water- and energy-use efficiencies.”, Raleigh, NC.
Githinji, L. J. (2007). “Evaluation of water-use in turfgrass.” Ph.D. dissertation, Dept. of Agronomy and Soils, Auburn Univ., Auburn, AL.
Haley, M. D., Dukes, M. D., and Miller, G. L. (2007). “Residential water use in Central Florida.” J. Irrig. Drain. Eng., 133(5), 427–434.
Hanks, R. J. (1983). “Yield and water-use relationships.” Limitations to efficient water use in crop production, H. M. Taylor, W. J. Jordan, and T. R. Sinclair, eds., ASA, Madison, WI, 393–410.
Irrigation Association. (2005). “Landscape irrigation scheduling and water management.” Draft, Water Management Committee, Falls Church, VA.
Irrigation Association. (2008). “Smart water application technology (SWAT) turf and landscape irrigation equipment testing protocol for climatologically based controllers; 8th draft testing protocol.” Falls Church, VA, 〈http://www.irrigation.org/WorkArea/linkit.aspx?LinkIdentifier=id&ItemID=415&libID=437〉 (Jan. 10, 2012).
Jordan, J. E., White, R. H., Vietor, D. M, Hale, T. C., Thomas, J. C., and Engelke, C. M. (2003). “Effect of irrigation frequency on turf quality, shoot density, and root length density of five bentgrass cultivars.” Crop Sci., 43(1), 282–287.
Luthin, J. N. (1973). Drainage engineering, Robert E. Krieger Publishing, Huntington, NY.
McCready, M. S., and Dukes, M. D. (2011). “Landscape irrigation scheduling efficiency and adequacy by various control technologies.” Agric. Water Manage., 98(4), 697–704.
McCready, M. S., Dukes, M. D., and Miller, G. L. (2009). “Water conservation potential of smart irrigation controllers on St. Augustinegrass.” Agric. Water Manage., 96(11), 1623–1632.
North Carolina Dept. of Agriculture and Consumer Services (NCDA&CS). (2000). “North Carolina agricultural statistics.” Raleigh, NC.
North Carolina Dept. of Agriculture and Consumer Services (NCDA&CS). (2001). “North Carolina turfgrass survey.” Raleigh, NC.
Osmond, D. L., and Hardy, D. H. (2004). “Characterization of turf practices in five North Carolina communities.” J. Environ. Qual., 33(2), 565–575.
Pittenger, D. R., Shaw, D. A., and William, E. R. (2004). “Evaluation of weather-sensing landscape irrigation controllers.” Rep. Submitted to Office of Water Use and Efficiency, California Dept. of Water Research, Univ. of California Cooperative Extension, Riverside, California.
Richie, W. E., Green, R. L., and Gibeault, V. A. (1997). “Using ETo (reference evapotranspiration) for turfgrass irrigation efficiency.” California Turfgrass Culture, 47(3–4), 9–16.
SAS Institute, Inc. (2004). “SAS/STAT 9.1 user’s guide.” Cary, NC.
Shedd, M., Dukes, M. D., and Miller, G. L. (2007). “Evaluation of evapotranspiration and soil moisture-based irrigation control on turfgrass.” Proc. ASCE EWRI World Environmental and Water Resources Congress, ASCE, Reston, VA.
Soil Conservation Service (SCS). (1971). Irrigation water requirements. Technical release No. 21, United States Department of Agriculture (USDA) Soil Conservation Service, Washington, DC.
Taylor, S. A. (1965). “Managing irrigation water on the farm.” Trans. ASAE, 8(3), 433–436.
U.S. Dept. of Agriculture (USDA). (2007). National soil survey handbook, title 430-VI, 〈http://soils.usda.gov/technical/handbook〉 (Sep. 2, 2009).
van Genuchten, M. T. (1980). “A closed-form equation for predicting the hydraulic conductivity of unsaturated soils.” SSSA J., 44(5), 892–898.
Vasanth, A. (2008). “Evaluation of evapotranspiration-based and soil-moisture-based irrigation control in turf.” M.S. thesis, Dept. of Biological and Agricultural Engineering, North Carolina State Univ., Raleigh, NC.
Youngner, V. B. (1985). “Physiology of water use and water-stress.” Turfgrass water conservation, publication 21405, V. A. Gibeault and S. T. Cockerham, eds., Univ. of California, Division of Agriculture and Natural Resources, Oakland, CA, 37–43.
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Published In
Journal of Irrigation and Drainage Engineering
Volume 139 • Issue 2 • February 2013
Pages: 113 - 123
Copyright
© 2013 American Society of Civil Engineers.
History
Received: Mar 20, 2012
Accepted: Aug 6, 2012
Published online: Aug 18, 2012
Published in print: Feb 1, 2013
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