|WORLD METEOROLOGICAL ORGANIZATION||
|Explanation of the criteria for classification and numbering of components||
|Explanation of the dates on the component's description|
MEAN AREAL PRECIPITATION (NWSRFS-MAP)
1. Purpose and objectives
The program contains techniques and procedures for computing
basin-wide estimates of mean areal precipitation from time series of observed hourly and daily point precipitation data.
The program is designed to prepare times series of mean areal
precipitation for input to the NWS River Forecast System lumped rainfall-
runoff models, such as the Sacramento Soil Moisture Accounting model (NWSRFS-SAC-SMA). Included are methods for estimating missing precipitation
Options are included to compute grid point or Thiessen weights for each station, or input predetermined station weights; compute MAP in a 1,
3, or 6 hour interval; input a maximum of 9 changes in observation time for each daily station; input a maximum of 10 precipitation correction factors for each station; make consistency plots of a station's precipitation data without computing or printing MAP; and make consistency plots of a station's precipitation data without including that station in the group
ASCII files of time series of daily and hourly observed precipitation are required in a specific format: OH Datacard Format.
ASCII time series of mean areal precipitation values are printed or written to a disk file. Consistency plots of station input data and a MAP summary are printed.
5. Operational requirements and restrictions
a) One person with knowledge and experience in analysing precipitation
b) One day of training is required.
c) The program was written in FORTRAN 77 for use on an HP workstations.
d) Input file sizes are not restricted.
e) Program limitations: at least one time series of hourly data is
6. Form of presentation
Program available as part of the National Weather Service River Forecast System (NWSRFS); documentation is included.
7. Operational experience
Has been used extensively in the USA with good results.
8. Technical support
Dr. Michael Smith
10. Conditions on use
|(First entered: 11 FEB 81||
Last updated: 01 DEC 99)