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SDI in the Great Plains​

Session 10. Microirrigation of Turf and Landscapes

Maximum Run Time for Sprinkling Irrigation

Joe Y. T. Hung and Alan C. Krinik

Microsprinkling Irrigation has become more popular in recent years in landscape applications. However, the maximum run time for different types of soil per irrigation is still an unsolved problem. The purpose of this paper was to derive an equation based on the concept of the precipitate volume of water from the sprinkling irrigation system and the soil infiltration capacity curve.

The derived equation was able to calculate the maximum run time per irrigation (based on the field tested infiltration rate) for different types of soil. Using the maximum run time, the number of repeated cycles per irrigation may be estimated and the run off problem can be minimized or eliminated. An example of applying the derived equation was cited.

Keywords: Microsprinkling, Landscape Irrigation, Maximum Run Time, Repeated Cycles, Infiltration Capacity

Abstract taken from paper found on pages 288 to 291 in Proceedings of 5th International Microirrigation Congress, April 2-6, 1995, Orlando, Florida. American Society of Agricultural Engineers, 2950 Niles Road, St. Joseph, Michigan 49085-9659, USA. Phone: 616-429-0300 FAX: 616-429-3852 EMAIL: HQ@ASAE.ORG

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Determination of Emitter Spacing and Irrigation Run Time Including Plant Root Depth

Joseph Y. T. Hung

The application of drip irrigation in the landscape field has been moving rapidly in recent years due to drought experiences in the sun belt areas of the United States. The determination of emitter spacing without considering the plant rooting depth will result in the deep percolation beyond the root zone of plants. Wasting water through the deep percolation is obvious if the run time factor is not considered in determining emitter spacing. This can be accomplished by incorporating the emitter spacing with the plant root depth so that the deep percolation can be minimized or eliminated.

The method of determining emitter spacing developed from this study was based on the test data collected previously from previous research. Examples were cited in the paper to help understand the application of this method.

Keywords: Emitter Spacing, Irrigation Run Time, Available Soil Moisture, Conventional Emitter Spacing Method, Sandy Soil, Medium Soil, Clay Soil

Abstract taken from paper found on pages 292 to 296 in Proceedings of 5th International Microirrigation Congress, April 2-6, 1995, Orlando, Florida. American Society of Agricultural Engineers, 2950 Niles Road, St. Joseph, Michigan 49085-9659, USA. Phone: 616-429-0300 FAX: 616-429-3852 EMAIL: HQ@ASAE.ORG

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Microirrigation for Small and Irregular Landscape Areas

Tom Bressan

Irrigation of small, narrow and irregular areas of the landscape. Landscape areas range from containers to traffic medians. Includes design approaches as well as appropriate uses of the various microirrigation products to eliminate or reduce the problems of over spray, runoff, lack of uniformity and blockage.

Keywords: Ornamental plants, Turf, emitter, drip irrigation

Abstract taken from paper found on pages 297 to 299 in Proceedings of 5th International Microirrigation Congress, April 2-6, 1995, Orlando, Florida. American Society of Agricultural Engineers, 2950 Niles Road, St. Joseph, Michigan 49085-9659, USA. Phone: 616-429-0300 FAX: 616-429-3852 EMAIL: HQ@ASAE.ORG

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Subsurface Drip Irrigation (SDI) on Turfgrass: A University Experience

D. F. Zoldoske, S. Genito, G. S. Jorgensen

The practice of placing tubing and drip emitters beneath the soil surface to irrigate crops continues to gain acceptance in agriculture, particularly in the production of annual crops. However, the use of the subsurface drip method to irrigate turfgrass has only begun to be explored. This paper focuses on the experiences gained at California State University, Fresno (CSUF) in adopting subsurface drip irrigation (SDI) technology to large turf areas as compared to more conventional sprinkler systems on the University campus.

There are many benefits associated with the SDI method of irrigation other than water savings. Additional savings identified in this study include energy, maintenance, reduction in public complaints, and reduced compaction/run-off. Furthermore, reduced liability is recognized as another important component of potential benefit, but no attempt at measurement was made as part of this study.

This study began in early spring of 1994 and was completed in the fall of the same year. It compares the installation, operation, and maintenance experiences of a SDI system with that of a more conventional sprinkler system. Both systems were retrofits, and installed in high traffic and visibility areas adjacent to one another. The two systems were designed and installed by Center for Irrigation Technology (CIT) staff and operated and maintained by Plant Operation personnel of CSUF.

Keywords: landscape, microirrigation, turf, grass, uniformity

Abstract taken from paper found on pages 300 to 302 in Proceedings of 5th International Microirrigation Congress, April 2-6, 1995, Orlando, Florida. American Society of Agricultural Engineers, 2950 Niles Road, St. Joseph, Michigan 49085-9659, USA. Phone: 616-429-0300 FAX: 616-429-3852 EMAIL: HQ@ASAE.ORG