Synopsis Most present-day drought management practices are event-based. This book provides the desired collateral information about the onset, progress and termination of drought. Different chapters provide insight into the various aspects of drought; drought indicators; clouds and their classification; surface and sub-surface water and storage system; soil and crop type and water requirement; an overview of orbital satellite data analysis; spatial data and geographical information systems in drought assessment. Drought vulnerability analysis is treated extensively and occurrences and resources profiles of countries are dealt with in detail for comparison and improved decision making.