Definitions of Drought USGS. Water Data. Quotes definitions of drought from several sources. Addresses different types of drought such as agricultural and meteorological drought.
Desert Research Institute University and Community College System of Nevada. "Pursues a program of basic and applied environmental research on a local, national, and international scale" specific to the desert region.
NOAA Regional Climate Centers NOAA. Satellite and Information Service. Working cooperatively with the National Climatic Data Center (NCDC), state climate offices and among themselves to acquire and disseminate accurate, up-to-date climate data and information. [State Climate Offices can be found through a National Climatic Data Center (NCDC) resource page.]
SAHRA (Sustainability of Semi-Arid Hydrology and Riparian Areas) University of Arizona. "The vision of SAHRA is to develop an integrated, multidisciplinary understanding of the hydrology of semi-arid regions, and to build partnerships with a broad spectrum of stakeholders (both public agencies and private organizations) so that this understanding is effectively applied to the management of water resources and to the rational implementation of public policy."