DETERMINATION OF MANNING ROUGHNESS COEFFICIENT FOR BORDER IRRIGATION SYSTEM | ||||
| Misr Journal of Agricultural Engineering | ||||
| Article 4, Volume 28, Issue 2, April 2011, Page 302-323 PDF (801.07 K) | ||||
| Document Type: Original Article | ||||
| DOI: 10.21608/mjae.2011.105095 | ||||
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| Authors | ||||
| M. A. Kassem1; M. I. Ghonimy2 | ||||
| 1Assoc. Prof., Ag. Eng. Dept., Fac. of Ag., Cairo Univ., Egypt. | ||||
| 2Prof., Ag. Eng. Dept., Fac. of Ag., Cairo Univ., Egypt. | ||||
| Abstract | ||||
| Manning roughness coefficient "n" is one of the most important factors affecting the border irrigation design. The purpose of this study is to determine the Manning roughness coefficient values "n" for border irrigation in a clay loam soil with compacted and un-compacted soil under continuous and surge flow. The determination was based on the volume balance equation in the form of a differential equation that was solved with the forward finite difference. The results indicated that, soil surface compaction had its effect on n values of the first irrigation and had not any effect for the next irrigations. For continuous flow, at first irrigation, the values of n were 0.1915 and 0.164 for un-compacted and compacted soils respectively. At the second irrigation, the n values decreased by about 44.51% and 49.82% compared to the first irrigation for compacted and un-compacted soil respectively. However, after the second irrigation, the seedling of wheat resulted on increases the n values. The minimum value, 0.083, of n was achieved at the second irrigation for surge flow. While, the maximum value, 0.25, of n was found at the seventh irrigation for continuous flow. Also, by using surge flow, the n values were decreased compared with those for continuous flow without vegetation crop or with wheat crop. | ||||
| References | ||||
|
Anter, I. , M. Negmand and M. I. Mecheal. 1987. Analysis methods of agricultural soils. Soil and Water Res. Inst.Agric.Res.Center., Tech. Report (8):1-22.
Bakery, M. F., T. K. Gater and A. F. Khattab. 1992. Field measured hydraulic resistance characteristics in vegetation infested canals. Journal of Irrigation and Drainage Engineering, 118, 256–274.
Benami, A. and A. Ofen. 1984. Irrigation Engineering: Sprinkler, Trickle, Surface Irrigation. Principles, Design and Agricultural Practices. Irrigation Engineering Scientific Publication, IIIC Bet Dagan, Israel.
Chow, V. T. 1959. Open Channel Hydraulics, 680 pp. McGraw-Hill, New York.
De-Leenheer, L. and M. De-Boodt 1966. Soil physics. International training center for post graduate soil scientist, Ghent, Belgium.
Gilley, J. E. and S. C. Finkner. 1991. Hydraulic roughness coefficients as affected by random roughness. Transactions of the ASAE, 34, 897–903.
Henderson, F. M. 1966. Open Channel Flow, 522pp. Macmillan, New York
James, L. C. 1988. Principles of Farm Irrigation System Design. New York. Willey:230p.
Kassem, M. A. and M. I. Ghonimy. 2001. The effect of soil compaction on soil physical properties, the cumulative infiltration rate and the seeds germination. Misr J. Ag. Eng., 18 (2): 222 – 242.
Kepner, W. D. and W. S. Chepil. 1960. Size distribution of aggregate. In C. A. Black et al. Method of soil analysis part 1. Agronomy. 9: 499-510.
Morcos, M. A., M. A. Abou Zaid and M. A. kassem. 1996. The reliability of the mathematical models for long borders and long furrows applying surge technique. Misr J. Ag. Eng, Cairo Univ.Irr.Conf.,3-4 April : 465-501.
Sepaskhah, A.R. and H. Bondar.2002. Estimation of Manning roughness coefficient for bare and vegetated furrow irrigation. Journal of Biosystems Engineering 82 (3), 351–357.
Strelkoff, T. 1969. One-dimensional equations of open channel flow. Journal of Hydraulics, American Society of Civil Engineering, 95, 861–876.
Trout, T. J. 1992. Furrow flow velocity effect on hydraulic roughness. Journal of Irrigation and Drainage Engineering, 118, 981–987.
Valiantzas, J. D. 1994. Simple method for identification of border infiltration and roughness characteristics. Journal of Irrigation and Drainage Engineering, 120, 233–249.
Walker, W. R. and G. V. Skogerboe. 1987. Surface Irrigation: Theory and Practice, 386pp. Prentice Hall, Inc., Englewood Cliffs, NJ.
Wallender, W. W. and M. Rayej. 1990. Shooting method for Saint- Venant equation of furrow irrigation. Journal of Irrigation and Drainage Engineering, 116, 114–121. | ||||
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