ISHS Acta Horticulturae 171: I International Symposium on Water Relations in Fruit Crops
A SURGE - FLOW OPERATING SYSTEM COMBINING SUBSURFACE IRRIGATION WITH DRAINAGE. |
| Author: | V. Sardo |
| Abstract:
A major breakthrough in furrow irrigation, the surge - flow first developped by Stringham and Keller and later explored by Walker and coworkers, brings about a greater uniformity in distribution by delivering water to the furrows in pulses instead of a continuous flow. A similar surge - flow, simply achieved by means of a self - priming siphon as implemented by Celestre, can be applied to shallow subsurface drains embedded in gravel, which act as line emitters or subsurface furrows. The main advantages are that no filtration and a very low head are required. Parameters to be determined in designing such system are the limits of flow rate (according to soil intake family, slope and length) and the on/off time ratio. First order shallow drains dicharge into second order deeper ones, thus forming together an effective draining system. | |
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