evaluation of groundwater potential zone in ibadan area oyo state southwestern nigeria using geospatial techniques and analytical hierarchy process.

Paper number

IAC-17,B1,IP,14,x36145

Author

Mr. ALABI BABATUNDE, Federal University of Technology Akure, Ondo State., Nigeria

Coauthor

Dr. A. Yekini Biodun Anifowose, Federal University of Technology Akure, Nigeria

Coauthor

Mr. Olabanji Aladejana, Nigeria

Coauthor

Mr. Adedeji Oluwatola I., National Space Research and Development Agency (NASRDA), Abuja, Nigeria

Year

2017

Abstract

With the advancement of powerful and high-speed personal computers, efficient techniques for water management have evolved. Also, recently, development and increasingly used of groundwater   for many purposes has led to depletion of groundwater level also led to land subsidence. Since water is a fundamental resource for life, understanding its availability would assist governments and other relevant authorities in planning settlement, agriculture and industry. In this present study, an attempt has been made to delineate possible groundwater potential zones in Ibadan,Oyo state Southwestern Nigeria using geospatial techniques and Analytic hierarchy process (AHP).Difference thematic layers were considered in this study, these are geology, drainage density, soil, slope, land use /land cover, lineament density, geomorphology and rainfall which were prepared using Nigeria sat-X, Landsat 8, Quickbird, Digital elevation model from Shultle Radar Topographical mission (SRTM), Google earth imagery, Pedological and geological data. All these themes and their individual features were then assigned weights using Idrisi selva software and AHP calculator online respectively according to their relative importance in groundwater occurrence and the corresponding normalized weights were obtained based on the saaty’s analytical hierarchy process alongside with six different GIS software. The thematic layers were finally integrated using ArcGIS 10.2 version software to yield a groundwater potential zone map of the study area. In the course of this study interoperability of these software were noted. Thus, four different groundwater potential zones were identified, namely ‘excellent’, ‘good’, ‘fair’, and ‘poor’. The groundwater potential Zone map of the study area produced revealed that about 4.23% area of the catchment comes under the category of excellent groundwater prospective zones, about 9.07% area consisting of upper slopes comes under the category of good groundwater prospective zones while the remaining fall in the category of fair and poor groundwater prospective zones with 21% and 65.7% respectively.Finally, it is concluded that, the integration of these different thematic layers to generate groundwater potential zone map could be very useful for various purposes such as the development of sustainable scheme for groundwater and best place for practicing Farming system expectially during dry saeson in the area. Thus, the integration of GIS and data extracted from satellite images and the geological knowledge of the area under study can provide a powerful tool in groundwater investigation, therefore, the Geospatial technologies are very efficient and useful for the identification of groundwater potential zones.
Key words
Goespatial techniques, GIS, AHP and Interoperability.

Abstract document

IAC-17,B1,IP,14,x36145.brief.pdf

Manuscript document

IAC-17,B1,IP,14,x36145.pdf (🔒 authorized access only).

To get the manuscript, please contact IAF Secretariat.