A microcomputer-based routine for obtaining mean watershed precipitation from point values

An interactive microcomputer based BASIC routine for averaging precipitation over an irregularly shaped watershed is presented. Averaging methods used include the station average, Thiessen, and isohyetal methods, with the user having the option of using either inverse distance weighting schemes or punctual kriging for interpolation in the isohyetal method. The routine may be used to compare different averaging methods or to examine the effects of missing data. Data may be entered from a stored ASCII file, interactively from the keyboard from the application of the routine to a specific watershed also are presented.