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| Web URL(s): | https://listings.lib.msu.edu/nwtgc/1987.pdf#page=23
Last checked: 01/17/2017
Requires: PDF Reader |
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| Publication Type:
| Proceedings |
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| Author(s): | Hogan, Donald A. |
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| Author Affiliation: | Principal Engineer, D. A. Hogan & Associates, Seattle, Washington |
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| Title: | Low application rates for irrigation |
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| Meeting Info.: | Salishan Lodge, Oregon, September 21-24, 1987 |
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| Source: | Proceedings of the 41st Annual Northwest TurfgrassConference. Vol. 41, 1987, p. 21-23. |
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| Publishing Information: | Northwest Turfgrass Association |
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| # of Pages: | 3 |
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| Keywords: | TIC Keywords: Cost efficiency; Irrigation system design; Water use; square spacing; Triangular spacing; Sprinkler spacing; Pumps
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| Abstract/Contents: | Reports of concepts in low rate infrequent irrigation along with examples of how to achieve these desirable precipitation rates and the benefits of the lower cost of new or remodeled systems plus savings in operational costs for those systems that rely on pumping. Comparing a stream rotor to a spray system, it was determined that a stream rotor could achieve better coverage (28 foot radius compared to 15 foot radius for spray), at the same pressure (35 p.s.i.), a lower rate per minute (2.7 gpm compared to 5.0 gpm) and a more reasonable precipitation rate per hour (0.27 inches/hour compared to 2.0 inches/hour). Due to the increased coverage, the installation cost of the stream rotor is less, shooting a 63% decrease in the number of sprinklers and a 46 percent decrease in liner footage of pipe. Pressure regulation is used for precipitation rate control; spray type heads use adjustable orifices while rotary units can utilize valve control. The best utilized rotary pop-up sprinkler heads for large turf areas proved to be those with a 59 foot radius at 45 p.s.i. and require 12.1 gpm. At the prescribed spacing rate, this would result in a precipitation rate of 0.318 inches per hour. The savings and efficiency can also be passed onto the pumping facility; by reducing water requirements and head output, less water is needed. This was proved to make it possible to operate a smaller, more efficient pump with equal results. |
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| Language: | English |
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| References: | 0 |
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| Note: | Presented at the 41st Northwest Turfgrass Association, Salishan Lodge, Oregon, September 21-24, 1987. |
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| ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Hogan, D. A. 1987. Low application rates for irrigation. p. 21-23. In Proceedings of the 41st Annual Northwest TurfgrassConference. Salishan Lodge, Oregon, September 21-24, 1987. Northwest Turfgrass Association. |
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| Web URL(s):
https://listings.lib.msu.edu/nwtgc/1987.pdf#page=23
Last checked: 01/17/2017
Requires: PDF Reader |
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MSU catalog number: SB 433 .N6 |
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