DESIGN OF FIELD DRAINAGE AND FLOOD CONTROL STRUCTURES FOR MBIABET TRIBUTARY SWAMPS

Authors

  • Obot E. Essien Department of Agricultural and Food Engineering University of Uyo, P. O. Box 4309 Uniuyo Post office, Uyo, Nigeria. Author
  • G. Pitchel Former Rice Project, Ministry of Agriculture and Natural Resources, Uyo, Nigeria Author

Keywords:

Tributary swamp, Imperfect drainage, Drainage design, Rainfall frequency duration, Rational formula, Internal-rate-of-return

Abstract

Tributary swamps were identified in northern Akwa Ibon State in which agricultural development was serious constrained by imperfect drainage and high flood water level in them. Drainage design used 5 years rainfall return period with the rainfall duration frequency computed for N-consecutive-day rainfall using Gumbel Extreme Value (GEV) plotted on Gringerton position. The case of Mbiabet subcatchment swamp was designed for by sub-dividing it into 10 smaller subcatchments areas to be drained and using rational formula to computerize computed together with the excavation costs of such volumes. The project had a low financial rate of return that would be improved by good water management.

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Published

2011-09-30

Issue

Vol. 46 No. 3 (2011): NSE TECHNICAL TRANSACTION JOURNAL (NSE TT-J)

Section

Articles