and snow survey & water supply forecasting.
His Snowmelt Runoff Model (SRM) uses climate-change algorithms, imagery of snowpacks from National Aeronautics and Space Administration satellites, and data from ground-based SNOTEL
sensors in 11 western states to measure water levels.
sites operated by the USDA and the State of Montana are situated at elevations high enough to provide the needed maximum and minimum temperature and snowdepth data to estimate rate and timing of ice-margin loss as observed in the aerial photos.
Modern forecasts complement Church's manual methods with over 700 automated SNOTEL
(snow pack telemetry forecast) stations throughout the West.
NRCS collects snowpack and related climatic information manually and through an automated system called SNOTEL
(for SNOwpack TELemetry).