PADDY Function

This function allows standard paddy management inputs to be generalized for a field or group of fields.

Sample Paddy function:

Inputs:

• Number of Bund height entries
• Percolation rate (mm/d)
• Plowpan depth (mm)
• Dates of paddy management operations (days after planting)
• Maximum flood height (mm) - height of bund
• Minimum flood height (mm) - depth of target pool

The last three could be multiple

Outputs:

• a group of events for setting up paddy irrigation

Example

!	Dome operator	Variable to be modified	Value or Function	Function arguments			Bund operation #1			Bund operation #2			Bund operation #3
!		IRRIGATION VALUE	PADDY function	# of Bund height entries	Percolation rate (mm/d)	Plowpan depth (mm)	Operation date(days after planting)	Max flood (bund) height (mm)	Min flood height (mm)	Operation date(days after planting)	Max flood (bund) height (mm)	Min flood height (mm)	Operation date(days after planting)	Max flood (bund) height (mm)	Min flood height (mm)
&	FILL	IRVAL	PADDY()	3	2	150	-3	20	5	4	30	10	11	50	15

Results of Paddy function:

IDATE	IROP	IRVAL	! Comment
$PDATE-3	IR010	150	! puddling, plowpan depth
$PDATE-3	IR008	2	! percolation rate
$PDATE-3	IR009	20	! bund height
$PDATE-3	IR011	5	! target minimum flood level
$PDATE+4	IR009	30	! bund height
$PDATE+4	IR011	10	! target minimum flood level
$PDATE+11	IR009	50	! bund height
$PDATE+11	IR011	15	! target minimum flood level

Dome functions page

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