Hydrogeology and siting of micro-dams around Léo Burkina Faso

Hydrogeology and siting of micro-dams around Léo, Burkina Faso14 June 2010Figure 14 Satellite image of the Sanga micro-dam site just before the first rains (left imagecaptured at 25 May 2009) and and shortly after the first rains (right image captured at 5 June2009)During the field visits in February 2010 the water level, electrical conductivity (EC), temperature anddepth were measured of each scoophole and well surrounding the micro-dam of Sanga. Figure 15shows a satellite photo with the locations of all wells and scoopholes that were measured. The yellowline is the micro-dam, the red part it’s spillway. The light blue polygon is the area covered by waterwhen the water is at spillway level. The darker blue polygon is the surface water at 13 February 2010.The circles indicate wells, the squares scoopholes. All red wells and scoopholes are part of themonitoring programme. The white one’s aren’t but they were measured during the field visit.14