Water Exploration: Remote Sensing Approaches
The 250 million people who live in the Afro-Asian dryland belt face water shortage for their entire lives. Hundreds of millions more in less drought-prone regions have to cope repeatedly with reduced supplies. Resolving the shortage of domestic water supplies in arid and semi-arid lands largely focuses on groundwater resources and efficient capture of available surface water, preferably by recharging underground resources. The key lies in accurate and informative geological maps. Yet most areas of need have never been geologically mapped at scales better than 1:250,000.