Sub-Surface Drip Irrigation (SSDI)
G. Thiyagarajan*
Water Technology Centre, Tamil Nadu Agricultural University, Coimbatore, Tamil Nadu (641 003), India
Balaji Kannan
Water Technology Centre, Tamil Nadu Agricultural University, Coimbatore, Tamil Nadu (641 003), India
V. Sivakumar
Coconut Research Station, Tamil Nadu Agricultural University, Aliyarnagar, Tamil Nadu (642 101), India
DOI: NIL
Keywords: Capillary rise, Moisture movement, Root zone, Wetting front
Abstract
Sub-surface drip irrigation (SSDI) is a low pressure, high efficiency irrigation system that uses buried drip laterals to meet crop water requirements. A sub-surface drip irrigation system is flexible and can provide frequent irrigations. This is more suitable for arid, semi-arid, hot, and windy areas with limited water supply, especially on sandy type soils. Since the water is supplied below the soil surface, the effect of surface irrigation characteristics, such as crusting, saturated conditions of ponding water, and potential surface runoff are eliminated. With well-maintained system, water application is highly uniform and efficient. Wetting occurs around the lateral and moisture moves out in all directions due to capillarity.
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Reference
Lamm, F.R., D. H. Rogers, M. Alam, G. A. Clark, 2003. Design Considerations for Subsurface Drip Irrigation (SDI) Systems. Irrigation Management Series (MF-2578), Agricultural Experiment Station and Cooperative Extension Service, Kansas State University, Manhattan, Kansas, pp. 1-8.
Reich, D., R. Godin, J.L. Chávez, I. Broner, 2014. Subsurface Drip Irrigation, Crop Series Bulletin 4.716, Colorado State University Extension, Colorado, pp. 1-3.