THE DETECTION OF CHANGE VOLUME OF TAGWAI DAM, MINNA, NIGER STAT, NIGERIA, USING GEOLOGY, REMOTE SENSING (RS) AND GIS TECHNIQUES

Abstract

Scarcity of portable water in Minna metropolis with population density of about 1.93 million, during the dry season creates a demand for sustainable water conservation and management. This requires using appropriate and reliable information and data; hence the use of geological mapping and remote sensing techniques for relevant findings and the decision making for current and future management of Tagwai dam. Assessmentof the dynamics of Tagwai dam Minna, Niger State, Nigeria was investigated using geological mapping, landsat-ETM 2000 and Quickbird 2008. The images were processed, interpreted and classified using ILWIS 3.3 software. The results of the study showed a sharp decline in the surface of the area of the dam as indicated by 59 percent reduction between 2000 and 2008. In the light of the above and to prolong the lifespan of the dam that serve the population that served about 1.9 millon people, there is need to carryout dredging and evacuate weeds which has colonized the dam