FACULTY SEMINAR PRESENTATION, DEPARTMENT OF AGRICULTURAL AND BIOSYSTEMS ENGINEERING

TITLE:                      WATER MANAGEMENT FOR SUSTAINABLE AGRICULTURE – THE ROLE OF RAINWATER HARVESTING TECHNOLOGY

PRESENTER:          Dr. David A. OKUNADE

DATE:                       THURSDAY 17 NOVEMBER, 2016

TIME:                        10.00 - 11.30AM

VENUE:                    ROOM A24 (NEW COLLEGE BUILDING)

WATER MANAGEMENT FOR SUSTAINABLE AGRICULTURE – THE ROLE OF RAINWATER HARVESTING TECHNOLOGY

Abstract

Seasonal water shortages and dry spells at critical stages of crop development have resulted in adverse effect on crop yields. The shortage of water results from uneven distribution of rains, significant gaps between rain events and field water losses rather than from low seasonal or annual rainfall totals. In some areas, rainfall occurs in concentrated periods followed by prolonged dry spells while in some, occasional intense rainfall generates runoff that can be captured (when in abundance) and used later when it is scarce. The overall result of unpredictable spatial and temporal rainfall patterns indicates a very high risk from meteorological droughts and intra-seasonal dry spellswhose impact on rain-fed agriculture is complete crop-failure, which statistically, for semi-arid lands, occurs about once every 10 years.There are growing scarcity and inter-sectorial competition for water for domestic, agricultural and industrial uses, along with groundwater depletion, population increase and the adverse effect of climate change. The challenge of feeding the increasing world population in the face of these adverse effects of climate change depends to a large extent on improved agricultural water-use within the present land/water-use systems. There is the need to re-evaluate and consider alternative sources of water i.e. rainfall-runoff water and make judicious use especially during the time of scarcity. Intra-seasonal scarcity of water is a major and critical limitation to increasing and improving productivity of traditional rain-fed farming in Nigeria. Therefore, rainwater harvesting is considered crucial to mitigate short-duration droughts and dry spells, and contributes to sustainable agriculture, national development and food security.

About the Presenter

Dr. David A. Okunade is a Faculty in the Department of Agricultural and Biosystems Engineering, Landmark University, Omu-Aran, Kwara State. His primary research interest is in modelling crop yield and water-use under rainfed and rainwater harvesting conditions. Some of his works include Pond Water and Sewage Effluent Treatment, and Wastewater Irrigation and the Effect of Cassava Wastewater on Agricultural Soils and Nearby Water Resources in the Processing Environment. He has many academic publications to his credit and has attended many conferences locally and internationally; one of such is the International Workshop on Water Governance for Africa: The Challenge of Uncertainty and Change, funded by Economic and Social Reform Council (ESRC) at Bradford University, UK. He is a Commonwealth Scholar and a Visiting Fellow on the OAUIfe/Newcastle Linkage Programme. Dr. David Okunade is a Registered Engineer with COREN and Members of the American Society of Agricultural and Biological Engineers (ASABE), Nigerian Institution of Agric. Engineers (NIAE), and the Nigerian Society of Engineers (NSE). Dr. David A. Okunade is a Senior Lecturer, Department of Agricultural Engineering, Obafemi Awolowo University, Ile-Ife and currently on Sabbatical Leave in the Department of Agricultural and Biosystems Engineering, Landmark University, Omu-Aran, Kwara State.