Claessens, Luc, authorGarcia, Luis, authorLange, Robert, authorJensen, Marvin, authorColorado Water Resources Research Institute, Colorado State University, publisher2007-01-032007-01-031994http://hdl.handle.net/10217/9033January 1994.The Integrated Decision Support Group (IDS) at Colorado State University has developed a set ofmonthly reference evapotranspiration (Err) maps for the western slope of Colorado. The reference evapotranspiration maps were developed using geographic information systems (GIS) to manipulate spatial data. After the monthly alfalfa-based ETr maps were complete, a Graphical User Interface (GUI) was developed to allow the user to interactively view and query the maps. In accordance with current developments in the irrigation science community the Penman-Monteith was used to calculate ETr and alfalfa was selected as the reference crop for this study; Data parameters required as input for the Penman-Monteith equation are maximum and minimum temperature, relative humidity (or dew point temperature), solar radiation, and wind-speed. During the course of this project, several data sources have been identified. Where possible, data have been subjected to a quality check.reportsengCopyright and other restrictions may apply. User is responsible for compliance with all applicable laws. For information about copyright law, please see https://libguides.colostate.edu/copyright.Evapotranspiration -- Colorado -- MapsGeographic information systemsText