Functions/Subroutines
subroutine, public	runoff_curve_number_initialize (cell_is_active)
elemental real(c_float) function	prob_runoff_enhancement (fcfgi, fcfgi_ul, fcfgi_ll)
subroutine, public	update_previous_5_day_rainfall (infil, indx)
elemental real(c_float) function, public	update_curve_number_fn (ilanduseindex, isoilsindex, cell_index, it_is_growing_season, fsoilstorage_max, fcfgi, fcfgi_ll, fcfgi_ul)
elemental real(c_float) function	cn_ii_to_cn_iii (cn_ii)
elemental real(c_float) function	cn_ii_to_cn_i (cn_ii)
elemental subroutine, public	runoff_curve_number_calculate (runoff, curve_num_adj, cell_index, landuse_index, soil_group, it_is_growing_season, inflow, soil_storage_max, continuous_frozen_ground_index, cfgi_lower_limit, cfgi_upper_limit)
	Calculate the runoff by means of the curve number method.

Variables
real(c_float), dimension(:,:), allocatable, public	cn_arciii
real(c_float), dimension(:,:), allocatable, public	cn_arcii
real(c_float), dimension(:,:), allocatable, public	cn_arci
real(c_float), dimension(:,:), allocatable, public	prev_5_days_rain
integer(c_int), dimension(:), allocatable	ilandusecodes
integer(c_int)	daycount
integer(c_int), parameter, public	five_day_sum = 6
real(c_float), parameter	amc_dry_growing = 1.40_c_float
real(c_float), parameter	amc_dry_dormant = 0.50_c_float
real(c_float), parameter	amc_wet_growing = 2.10_c_float
real(c_float), parameter	amc_wet_dormant = 1.10_c_float
type(datetime_t)	date_last_updated

Function/Subroutine Documentation

◆ cn_ii_to_cn_i()

elemental real (c_float) function runoff__curve_number::cn_ii_to_cn_i ( real (c_float), intent(in) cn_ii )

private

Definition at line 257 of file runoff__curve_number.F90.

◆ cn_ii_to_cn_iii()

elemental real (c_float) function runoff__curve_number::cn_ii_to_cn_iii ( real (c_float), intent(in) cn_ii )

private

Definition at line 243 of file runoff__curve_number.F90.

◆ prob_runoff_enhancement()

elemental real (c_float) function runoff__curve_number::prob_runoff_enhancement	(	real (c_float), intent(in)	fcfgi,
		real (c_float), intent(in)	fcfgi_ul,
		real (c_float), intent(in)	fcfgi_ll )

private

Definition at line 115 of file runoff__curve_number.F90.

◆ runoff_curve_number_calculate()

elemental subroutine, public runoff__curve_number::runoff_curve_number_calculate	(	real (c_float), intent(inout)	runoff,
		real (c_float), intent(inout)	curve_num_adj,
		integer (c_int), intent(in)	cell_index,
		integer (c_int), intent(in)	landuse_index,
		integer (c_int), intent(in)	soil_group,
		logical (c_bool), intent(in)	it_is_growing_season,
		real (c_float), intent(in)	inflow,
		real (c_float), intent(in)	soil_storage_max,
		real (c_float), intent(in)	continuous_frozen_ground_index,
		real (c_float), intent(in)	cfgi_lower_limit,
		real (c_float), intent(in)	cfgi_upper_limit )

Calculate the runoff by means of the curve number method.

Runoff is calculated using a modification of the curve number method. Specifically, the initial abstraction is defined as 0.05 * SMax rather than the standard 0.20 * SMax of the original method. This redefinition of the initial abstraction term was found to be more appropriate for long-term continuous simulations than the standard 0.2 * SMax of the original.

Parameters

[in]	iLanduseIndex	Pre-configured index number corresponding to a line in the landuse lookup table.
[in]	iSoilsGroup	The numerical index associated with the soils group of interest.
[in]	fInflow	The sum of net rainfall, snowmelt, and runon from upslope cells (and possibly irrigation).
[in]	fCFGI	The current value of the continuous frozen-ground index.
[in]	lIsGrowingSeason	Logical value indicating whether dormant season or growing season criteria values are to be used when calculating runoff.

Return values

fRunoff Daily runoff calculated by means of the SCS Curve Number method.

Note: Reference: Woodward, D. E., R. H. Hawkins, R. Jiang, A. Hjelmfeldt Jr, J. Van Mullem, and Q. D. Quan. "Runoff Curve Number Method: Examination of the Initial Abstraction Ratio." In Conference Proceeding Paper, World Water and Environmental Resources Congress, 2003.

Definition at line 290 of file runoff__curve_number.F90.

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◆ runoff_curve_number_initialize()

subroutine, public runoff__curve_number::runoff_curve_number_initialize ( logical (c_bool), dimension(:,:), intent(in) cell_is_active )

Determine how many soil groups are present

Determine how many landuse codes are present

Definition at line 40 of file runoff__curve_number.F90.

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◆ update_curve_number_fn()

elemental real (c_float) function, public runoff__curve_number::update_curve_number_fn	(	integer (c_int), intent(in)	ilanduseindex,
		integer (c_int), intent(in)	isoilsindex,
		integer (c_int), intent(in)	cell_index,
		logical (c_bool), intent(in)	it_is_growing_season,
		real (c_float), intent(in)	fsoilstorage_max,
		real (c_float), intent(in)	fcfgi,
		real (c_float), intent(in)	fcfgi_ll,
		real (c_float), intent(in)	fcfgi_ul )

Definition at line 159 of file runoff__curve_number.F90.

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◆ update_previous_5_day_rainfall()

subroutine, public runoff__curve_number::update_previous_5_day_rainfall	(	real (c_float), intent(in)	infil,
		integer (c_int), intent(in)	indx )

Definition at line 135 of file runoff__curve_number.F90.

Variable Documentation

◆ amc_dry_dormant

real (c_float), parameter runoff__curve_number::amc_dry_dormant = 0.50_c_float

private

Definition at line 32 of file runoff__curve_number.F90.

◆ amc_dry_growing

real (c_float), parameter runoff__curve_number::amc_dry_growing = 1.40_c_float

private

Definition at line 31 of file runoff__curve_number.F90.

◆ amc_wet_dormant

real (c_float), parameter runoff__curve_number::amc_wet_dormant = 1.10_c_float

private

Definition at line 34 of file runoff__curve_number.F90.

◆ amc_wet_growing

real (c_float), parameter runoff__curve_number::amc_wet_growing = 2.10_c_float

private

Definition at line 33 of file runoff__curve_number.F90.

◆ cn_arci

real (c_float), dimension(:,:), allocatable, public runoff__curve_number::cn_arci

Definition at line 17 of file runoff__curve_number.F90.

◆ cn_arcii

real (c_float), dimension(:,:), allocatable, public runoff__curve_number::cn_arcii

Definition at line 16 of file runoff__curve_number.F90.

◆ cn_arciii

real (c_float), dimension(:,:), allocatable, public runoff__curve_number::cn_arciii

Definition at line 15 of file runoff__curve_number.F90.

◆ date_last_updated

type (datetime_t) runoff__curve_number::date_last_updated

private

Definition at line 36 of file runoff__curve_number.F90.

◆ daycount

integer (c_int) runoff__curve_number::daycount

private

Definition at line 20 of file runoff__curve_number.F90.

◆ five_day_sum

integer (c_int), parameter, public runoff__curve_number::five_day_sum = 6

Definition at line 21 of file runoff__curve_number.F90.

◆ ilandusecodes

integer (c_int), dimension(:), allocatable runoff__curve_number::ilandusecodes

private

Definition at line 19 of file runoff__curve_number.F90.

◆ prev_5_days_rain

real (c_float), dimension(:,:), allocatable, public runoff__curve_number::prev_5_days_rain

Definition at line 18 of file runoff__curve_number.F90.

Functions/Subroutines

Variables

Function/Subroutine Documentation

◆ cn_ii_to_cn_i()

◆ cn_ii_to_cn_iii()

◆ prob_runoff_enhancement()

◆ runoff_curve_number_calculate()

◆ runoff_curve_number_initialize()

◆ update_curve_number_fn()

◆ update_previous_5_day_rainfall()

Variable Documentation

◆ amc_dry_dormant

◆ amc_dry_growing

◆ amc_wet_dormant

◆ amc_wet_growing

◆ cn_arci

◆ cn_arcii

◆ cn_arciii

◆ date_last_updated

◆ daycount

◆ five_day_sum

◆ ilandusecodes

◆ prev_5_days_rain