| 2007 | IGARSS | Comparative analysis of reflectance spectroscopy and laboratory based assessment of asbestos pollution in the rehabilitated mining environment, South Africa. | Brilliant Mareme Petja, Yaw A. Twumasi, George T. Tengbeh |
| 2006 | IGARSS | The use of Remote Sensing to Detect Asbestos Mining Degradation in Mafefe and Mathabatha, South Africa. | Brilliant Mareme Petja, Yaw A. Twumasi, George T. Tengbeh |
| 2005 | IGARSS | The impact of urban growth and long-term climatic variations on the sustainable development of the City of Niamey, Niger. | Yaw A. Twumasi, Andrew Manu, Tommy L. Coleman, Ide A. Maiga |
| 2004 | IGARSS | Application of remote sensing and GIS technologies to assess the impact of surface mining at Tarkwa, Ghana. | Andrew Manu, Yaw A. Twumasi, Tommy L. Coleman |
| 2003 | IGARSS | Integration of GIS technology for urban transportation planning: the experience in Owerri, Nigeria. | Sam O. Nwaneri, Yaw A. Twumasi |
| 2003 | IGARSS | Management of watersheds with Landsat TM data: a case study of the Volta River in Ghana. | Yaw A. Twumasi, Andrew Manu, Tommy L. Coleman |
| 2003 | IGARSS | The use of satellite imagery in rangeland management: a comparative analysis of three Sahelian zones. | Yaw A. Twumasi, Andrew Manu, Thomas L. Coleman, Gandah Mohamadou, Jean-Baptiste S. Taonda |
| 2003 | IGARSS | Application of GIS in community environmental education in the developing countries: the case of Ghana's forest region. | Shaibu A. Gariba, Yaw A. Twumasi |
| 2003 | IGARSS | Investigation of the impact of urban sprawl in three Sahelian cities using remotely-sensed information. | Andrew Manu, Yaw A. Twumasi, Tommy L. Coleman, Jean-Baptiste S. Taonda |
| 2003 | IGARSS | The use of GIS and satellite remote sensing techniques for the management of inland dry valley systems of the Sahel: the case of the watershed toposequence of Tanda, Niger. | Andrew Manu, Yaw A. Twumasi, Thomas L. Coleman, Ibrahim Zanguina |
| 2002 | IGARSS | Mapping seasonal hazards for flood management in Accra, Ghana using GIS. | Yaw A. Twumasi, Raymond Asomani-Boateng |