ICC Programming


6610.1 - Effect of Sediment-Hosted Disseminated Gold Deposit Mining on the Landscape of Itagunmodi-Igun Basin, SW. Nigeria

Thursday, July 6
2:50 PM - 3:10 PM
Location: Coolidge

Traditionally, the effects of artisanal gold mining activities have long attracted the interest of geomorphologists both in terms of landforms alteration and biodiversity response to change. This study assessed the effect of sediment-hosted disseminated gold mining on the landscape of Itagunmodi-Igun Drainage Basin within Ilesa Schist Belt, Southwestern Nigeria. This GIS-based approach predicted the terrain deformation and environmental degration of the study area. A GIS-based engineering-geomorphological analysis was conducted using DEM, Geological Information, Soil Characteristics and Vegetation Index as Input Data. The study showed that 42.0% of the entire basin would be impacted by ponds and mounds, 31.5×106 m3 of soil will be displaced and 44.1 km of stream/river network will be impacted. The result shows that human-induced activities particularly mining on the weathering intensity of the underlying bedrocks of the basin. The study concluded that artisanal mining could trigger extensive terrain deformation with consequent loss of biodiversity, ecological modification, increase in sediment delivery ratio and drainage obstruction within the basin.

Olawale Ayodeji Oluwafemi

Senior Scientific Officer
National Space Research and Development Agency, Centre for Geodesy and Geodynamics, Toro, Nigeria

Mr. Olawale Ayodeji Oluwafemi, Senior Research Officer with Nigerian Space Agency’s Centre for Geodesy and Geodynamics, Toro, Bauchi State Nigeria born in Ile-Ife, Osun State, West Africa, Nigeria on 28th Febuary 1985. Olawale is the President and the Coordinator of Students Learning Earth System Science (SLESS) a Non-Governmental Environmental Education Science Program in Nigeria. Mr. Olawale holds B.Sc Degree in Physical Geography with emphasis on Geomorphology from Obafemi Awolowo Univerisity , Ile-Ife, Nigeria in 2006 and also Master of Remote Sensing and GIS Degree from the same University in 2011. Olawale also obtained Master of Science Degree in Remote Sensing and GIS with special emphasis in Enviromental Geomorphology from Nigerian Defence Academy, Postgraduate School, Kaduna, Nigeria in 2017. Olawale is a member of GLOBE (Global Learning Observation to Benefit the Environment) International Scientist Newtwork (GISN) Mr. Olawale became the Lead Scientist, Global Precipitation Measurement (GPM)-GLOBE Satellite Mission Student Field Campaign in 2014 and GPM-NASA Master Teacher for the School Calendar Year 2014-2015.


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Jibril Mahmmah

Senior Lecturer
Nigerian Defence Academy

Jibril graduated from Federal University of Technology Minna with a P.hD in Geography in 1998


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Mahmud Mohammed

Assistant Director
Centre for Geodesy and Geodynamics

Mahmud graduated from Beira Interior University with a M.Sc (GIS) in 2013


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Lucia Lovison-Golob

Geospatial Director
Afriterra Foundation

Dr. Lucia Lovison-Golob is the Geospatial Director and Librarian of Afriterra Foundation and a Capacity Building coordinator for the Disasters at the Group of Earth Observations (GEO).


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6610.1 - Effect of Sediment-Hosted Disseminated Gold Deposit Mining on the Landscape of Itagunmodi-Igun Basin, SW. Nigeria

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