Mapping reservoirs in the Volta basin

In most semi-arid areas of the developing world, the number, size, and location of small reservoirs is unknown. To coordinate further planning, knowledge of the existing dam inventory is needed, especially for programs dedicated to reservoir rehabilitation and management.

This tool guide provides steps to obtain a regional reservoir inventory through remote sensing using Google Earth in conjunction with WaterWorld. Additionally, the detailed database of dams also allows for an analysis of the ecosystem-service relevant properties. 

Reservoir inventories are best done from imagery at the end of the rainy season, when the reservoirs are filled to their maximum extent, and cloud coverage decreases. 

*This tool is intended for use by technically schooled persons with an introductory knowledge of remote sensing. Access to remote sensing software, reasonably fast computers, and ample digital storage space are also prerequisites.