DESIGN AND EVALUATION OF SAND-FILLED DRIPPER

Document Type : Original Article

Author

Assoc. Prof. of Agric. Eng.., Fac. of Agric., Al-Azhar U., Egypt.

Abstract

The sand-filled dripper is a new invention. In fact, the sand dripper is a micro tube(Poly ethylene), its length ranges from 5 to20cm and its diameter is 5 or 11 mm which is filledofuniform grain size sand (homogenous) (1,0.8, and0.63 mm), it is closed from its ends by screen pieces with negligible flow resistance.The aim of this study is determining the characteristics of sand dripper and their effects with effective heads “H” on discharge “q”.These characteristics are length "L", diameter "D" and diameter of sand particles which fill ofthe tube. The dimensional analysis is used in this study, the results show that: (where: q is in L/h, g is in m/s2, H is in m, d is in cm, D is cm and C is a constant equal to 1.45 and 5.52 for typesof 5 and 11 mmrespectively).Thesand dripper type 11was notsuitable for use with the lateral lines of 16 or 18 cm. However, sand dripper type5issuitable for use as traditional emitter. The sand dripper type 5 which has 10 cm length and 0.8 mm sand diameter gave CV equal to 0.07 at effective head 12m.

Main Subjects

References

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Keller, J. and D. Karmeli (1975 ) : Trickle irrigation design . Rain Bird Sprinkler Manufacturing crop.,GlendoraCalif. 91740 USA:  62-66.
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James, L. G., (1988). Principles of farm irrigation system design, Johm Wiley and Sons, N. Y., :264- 266.

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