ARS | Publication request: SDI Considerations for North Carolina Growers and Producers

Submitted to: Extension Reports
Publication Type: Other
Publication Acceptance Date: August 1, 2007
Publication Date: February 1, 2008
Citation: Dukes, M.D., Haman, D.Z., Evans, R.O., Grabow, G.L., Harrison, K., Khalilian, A., Smith, W.B., Ross, D.S., Tacker, P., Thomas, D.L., Sorensen, R.B., Vories, E.V., Zhu, H. 2008. SDI Considerations for North Carolina Growers and Producers. N. C. Coop. Ext. Serv. AG-695-1.

Technical Abstract: Humid areas, such as the southeastern and midsouthern United States, have particular climate, topography, soils, cropping systems, and water sources that require special consideration when implementing a subsurface drip irrigation (SDI) system. These factors are normally different enough in value or type to result in a different system design, even though design criteria are generally the same in humid areas as in arid or semi-arid areas. Irregularly shaped fields commonly found in humid areas can result in a system layout that differs greatly from a "normal" layout. Installation is best done when the soil moisture is within an optimal range, which may seriously limit installation windows in humid areas. As fewer systems have been installed in humid regions, availability of professional installers and installation equipment can be problematic. This paper presents both design and installation considerations for SDI systems, with particular emphasis placed on conditions found in humid areas. Topics include: design criteria; pumps; filtration; chemical injection; valves; main and submain, dripline, and flushing manifold design; instrumentation and control systems; design implementation; installation tips; and locating an installer.