This multivolume handbook is the most comprehensive and updated reference of advanced geospatial techniques for water resource and watershed management. It addresses complex solutions that appear in individual articles but require an exhaustive search for assimilation. By assembling these tremendous advances in an expertly curated resource and making it available in depth to professionals and the water research community worldwide, this successful vehicle will help readers in elevating the quality and variety of water research and solutions. A broad range of authors, specialties, sources, institutions, countries, and continents showcase exemplary approaches and capabilities for the 21st century.