RAINWATER HARVESTING PRACTICES AND DESIGN OF RAINWATER        HARVESTING SYSTEM FOR OTUKPA COMMUNITY, BENUE STATE, NIGERIA...
Upcoming SlideShare
Loading in...5
×

Rainwater harvesting practices and design of rainwater harvesting system for Otukpa community, Benue state, Nigeria - Onoja S.B; Ocheja I.E and Isikwue M.O, Department of Agricultural and Environmental Engineering, University of Agriculture, Makurdi, Nige

923

Published on

Working Group 2

0 Comments
0 Likes
Statistics
Notes
  • Be the first to comment

  • Be the first to like this

No Downloads
Views
Total Views
923
On Slideshare
0
From Embeds
0
Number of Embeds
0
Actions
Shares
0
Downloads
24
Comments
0
Likes
0
Embeds 0
No embeds

No notes for slide

Rainwater harvesting practices and design of rainwater harvesting system for Otukpa community, Benue state, Nigeria - Onoja S.B; Ocheja I.E and Isikwue M.O, Department of Agricultural and Environmental Engineering, University of Agriculture, Makurdi, Nige

  1. 1. RAINWATER HARVESTING PRACTICES AND DESIGN OF RAINWATER HARVESTING SYSTEM FOR OTUKPA COMMUNITY, BENUE STATE, NIGERIA 1Onoja S.B; 2Ocheja I.E and 3Isikwue M.O 1,3 Department of Agricultural and Environmental Engineering, University of Agriculture, Makurdi 2Lower Benue River Basin Development Authority, Makurdi samomyonoja@yahoo.com Paper presented at the CTA Annual Seminar 22-26 November 2010, Johannesburg, South Africa1. INTRODUCTION 2. OBJECTIVES Sources of water for general human utilization include To: surface water, groundwater and lately rainwater i. study the rainwater harvesting practices in Otukpa community harvesting ii. design a rainwater harvesting system that utilizes similar Rainwater harvesting is the interception of material resources precipitation for human use close to where it falls before it sinks into the ground 3. METHODOLOGY Domestic Rainwater harvesting (DRWH), is usually The number of villages in Otukpa community were identified taken as roof run-off harvesting for safe human and total population of the community was estimated for 2015, consumption bearing in mind MDG for water supply. DRWH is motivated by exhaustion of surface supplies Reconnaissance survey was carried out to identify the rainwater and the falling levels of aquifers practices in the community. In Otukpa community, both surface water supplies Limited laboratory analyses were carried out to determine the and groundwater are not readily available quality of harvested rainwater in storage Standard procedures were followed to design a rainwater harvesting system using the same local materials4, RESULTSEvery building in the community had a roof-top rainwaterharvesting system in one form or the other, using corrugatediron sheets (Plates 1-3).The harvesting was done using guttersand downpipes (made of local wood, bamboo, foldedgalvanized iron sheets or PVC pipes), and led into storagecontainers. Plate 1 Plate 2 Plate 3 The storage reservoirs had covers that were however Based on the relationship W = 0.8 x A x R, an elevated rainwater not good enough to protect against contamination harvesting system including harvesting surface and storage was from the environment designed for 450,000 litres to cater for about 250 people to last The rainwater harvesting system of the community is the critical months of March, April and May of the year partial. The proportion of what was harvested to The cost of the developing this system was found to be about potential yield ranged from 5.06% to 23.05%. N 3 million (about € 14,176) Bacteriological results indicate that some of the Peculiarities of the system include well protected storage, storage points were contaminated while the samples possibility to harvest all the rainfall and diversion of the first flush collected directly from rainfall were consistently free from bacteriological presence. Designed elevated rainwater harvesting system Fig 1: Pictorial view Fig 2: Plan Fig 3:Sections 5. CONCLUSIONS Rooftop rainwater harvesting is a practice in Otukpa community This supply is however unable to sustain them through the dry periods An elevated rainwater harvesting system of 450,000 litres, for 250 people with a ACKNOWLEDGEMENT The authors are grateful to Technical Centre unit cost of about N 3,000,000.00 was designed for Otukpa for Agriculture and Rural Cooperation (CTA) Governments, NGOs, International and Intergovernmental Organisations and for the sponsorship that enabled us Agencies are hereby called upon to fund these projects as a sustainable participate in this year’s seminar and the VC, development for the community UAM for permission to attend.

×