VIC-2L Program Files

The following is a summary of the files and subroutines included in Dag Lohman's cleaned version of the VIC Two Layer model.

Model Main Subroutines:

Filename	Subroutine Name	Input Variables	Returned Variables	Description
vic2l.c	main	Parameter, Data and Output File Names	None	This program monitors file I/O and runs model.
cmd_proc.c	cmd_proc	Command Line Arguments	Filename Struct	Extracts filenames and other info from command line arguments.
aurad.c	fltrad	sehortz, swhortz, slat, jday, tranday	Short Wave Raditation	Computes net shortwave radiation using sun-earth geometry, and transmissivity.
	shrad	asp, dslop, slat, sehorz, swhorz, jday, tranday	Short Wave Radiation	Computes net shortwave radiation as above, but including surface characteristics.
rad_and_vpd.c	rad_and_vpd	Atmos Data Struct, Soil Data Struct, Number of Records	Array of DMY Structs	Calculates daily evaporation, and radiation balance.
calc_netshort.c	calc_netshort		Net Short Wave Radiation	Calculates the short wave radiation.
calc_trans.c	calc_trans	Delta T, Elevation	trans	Computes transmissity???
long_shortwave.c	in_shortwave	Latitude, Day, Transmissivity	Incoming Solar Radiation	Computes incoming solar radiation, based on time of year, latitude, and clarity of atmosphere.
	net_out_longwave	Transmissivity, Trans of Clear Air, Air Temp, Vapor	Net Outgoing Longwave Radiation	Computes outgoing longwave radiation.
twolayer_vic_roff.c	twolayer_vic_roff	Soil Data Struct, PPT	Soil Struct	Computes runoff from grid cell.
arno_evap.c	arno_evap	Atmos Data Struct, Soil Data Struct, Global Struct	Soil Struct	Computes evaportation of an area as a percentage based on saturation.
canopy_evap.c	canopy_evap	Atmos Data Struct, Soil Data Struct, Veg Data Struct, Global Struct	Soil Struct, Veg Struct	Computes evaporation from canopy using penman equations.
priestley.c	priestley	Air Temp, Net Radiation	Potential Evaporation	Computes potential evaporation using Priestley-Taylor.
penman.c	penman	Net Radiation, Vapor Pressure Deficit, Aerodynamical Resistance, Minimum Stomatal Resistance, Architectural Resistance
svp.c	svp	Temp	svp
	svp_slope	Temp	svp_slope

Model Input and Output:

Filename	Subroutine Name	Input Variables	Returned Variables	Description
get_global_param.c	get_global_param	Global Parameter File	Global Struct	Reads in global parameters from global input file.
read_soilparam.c	read_soilparam	Soil Parameter File	Soil Struct	Reads soil parameters from soil input file
read_vegparam.c	read_vegparam	Vegitation Parameter File, Grid Cell	Vegitation Struct	Reads vegetation parameters from vegetation input file.
read_atmosdata.c	read_atmosdata	Atmos Data File, Snow Data File	Atmos Data Struct, Number of Records	Reads atmospheric and snow data from input files.
write_vegparam.c	write_vegparam	Vegitation Struct	None	Writes values of vegetation parameters to stdout
write_atmosdata.c	write_atmosdata	Atmos Data Struct, Number of Records	None	Writes atmospheric data values to stdout.
write_data.c	write_data	Array of Out Data, Outfile Struct, Number of Records	None	Writes output for all time steps in simulation.
make_infiles.c	make_infiles	Soil Struct	Input File Pointers, Output File Pointers, Filename Struct	Creates input and output filenames using current grid cell lat and lng.
make_outfiles.c	make_outfiles	Input File Pointer Struct	Output File Pointer Struct	Creates and opens output files.
check_files.c	check_files	Filename Struct	File Pointer Struct	Opens soil, vegetation, and global parameter files.
open_file.c	open_file	Filename, Filetype	File Pointer	Checks and opens File.
close_files.c	close_files	Infile Struct, Outfile Struct	None	Closes all files.

Data Array Controls:

Filename	Subroutine Name	Input Variables	Returned Variables	Description
make_dmy.c	make_dmy	Global Struct	Array of DMY Struct	Creates Day, Month, Year records for each time step.
make_veg_var.c	make_veg_var	Number of Vegitation Types	Array of Vegitation Structs	Creates vegetation records for each vegetation type.
make_soil_var.c	make_soil_var	Number of Vegitation Types	Array of Soil Structs	Creates soil records for each vegetation type.
make_out_data.c	make_out_data	Number of Records	Array of Out Data Structs	Creates out data records for each time step.
put_data.c	put_data	Soil Struct, Vegitation Struct, Vegitation Data Struct	Output Struct	Sums contributions from all vegetation types, and computes final grid values for output.

Initialization Routines:

Filename	Subroutine Name	Input Variables	Returned Variables	Description
initialize_soil.c	initialize_soil	Soil Data Struct, Number of Vegitation Types	Soil Struct	Initializes upper and lower soil layers using initial moisture values.
initialize_veg.c	initialize_veg	Vegitation Data Struct, Global Struct	Vegitation Struct	Initializes vegetation with dew levels half maximum.