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4.2.4. SUEWS_Irrigation.txt

SUEWS includes a simple model for external water use if observed data are not available. The model calculates daily water use from the mean daily air temperature, number of days since rain and fraction of irrigated area using automatic/manual irrigation. The sub-daily pattern of water use is modelled according to the daily cycles specified in SUEWS_Profiles.txt.

Alternatively, if available, the external water use can be provided in the met forcing file (and set WaterUseMethod = 1 in RunControl.nml) by filling the Wuh columns with valid values.

No. Column Name Use Description
1 Code L Code linking to a corresponding look-up table.
2 Ie_start MU Day when irrigation starts [DOY]
3 Ie_end MU Day when irrigation ends [DOY]
4 InternalWaterUse MU Internal water use [mm h-1]
5 Faut MU Fraction of irrigated area that is irrigated using automated systems
6 Ie_a1 MD Coefficient for automatic irrigation model [mm d-1 ]
7 Ie_a2 MD Coefficient for automatic irrigation model [mm d-1 K-1]
8 Ie_a3 MD Coefficient for automatic irrigation model [mm d-2 ]
9 Ie_m1 MD Coefficient for manual irrigation model [mm d-1 ]
10 Ie_m2 MD Coefficient for manual irrigation model [mm d-1 K-1]
11 Ie_m3 MD Coefficient for manual irrigation model [mm d-2 ]
12 DayWat(1) MU Irrigation allowed on Sundays [1], if not [0]
13 DayWat(2) MU Irrigation allowed on Mondays [1], if not [0]
14 DayWat(3) MU Irrigation allowed on Tuesdays [1], if not [0]
15 DayWat(4) MU Irrigation allowed on Wednesdays [1], if not [0]
16 DayWat(5) MU Irrigation allowed on Thursdays [1], if not [0]
17 DayWat(6) MU Irrigation allowed on Fridays [1], if not [0]
18 DayWat(7) MU Irrigation allowed on Saturdays [1], if not [0]
19 DayWatPer(1) MU Fraction of properties using irrigation on Sundays [0-1]
20 DayWatPer(2) MU Fraction of properties using irrigation on Mondays [0-1]
21 DayWatPer(3) MU Fraction of properties using irrigation on Tuesdays [0-1]
22 DayWatPer(4) MU Fraction of properties using irrigation on Wednesdays [0-1]
23 DayWatPer(5) MU Fraction of properties using irrigation on Thursdays [0-1]
24 DayWatPer(6) MU Fraction of properties using irrigation on Fridays [0-1]
25 DayWatPer(7) MU Fraction of properties using irrigation on Saturdays [0-1]

An example SUEWS_Irrigation.txt can be found below:

1     	 2        	 3      	 4                	 5    	 6       	 7     	 8     	 9      	 10    	 11    	 12        	 13        	 14        	 15        	 16        	 17        	 18        	 19           	 20           	 21           	 22           	 23           	 24           	 25
Code  	 Ie_start 	 Ie_end 	 InternalWaterUse 	 Faut 	 Ie_a1   	 Ie_a2 	 Ie_a3 	 Ie_m1  	 Ie_m2 	 Ie_m3 	 DayWat(1) 	 DayWat(2) 	 DayWat(3) 	 DayWat(4) 	 DayWat(5) 	 DayWat(6) 	 DayWat(7) 	 DayWatPer(1) 	 DayWatPer(2) 	 DayWatPer(3) 	 DayWatPer(4) 	 DayWatPer(5) 	 DayWatPer(6) 	 DayWatPer(7)
99999 	 1        	 366    	 0                	 0    	 0       	 0     	 0     	 0      	 0     	 0     	 0         	 0         	 0         	 0         	 0         	 0         	 0         	 0            	 0            	 0            	 0            	 0            	 0            	 0 ! No        irrigation
1     	 152      	 243    	 0                	 0.2  	 -84.535 	 9.959 	 3.674 	 -25.36 	 2.988 	 1.102 	 1         	 1         	 1         	 1         	 1         	 1         	 1         	 1            	 1            	 1            	 1            	 1            	 1            	 1
550   	 1        	 366    	 0                	 0    	 0       	 0     	 0     	 0      	 0     	 0     	 0         	 0         	 0         	 0         	 0         	 0         	 0         	 0            	 0            	 0            	 0            	 0            	 0            	 0 ! Swindon 	 "(not        used,   no           irrigation)"
660   	 1        	 366    	 0                	 0    	 0       	 0     	 0     	 0      	 0     	 0     	 0         	 0         	 0         	 0         	 0         	 0         	 0         	 0            	 0            	 0            	 0            	 0            	 0            	 0 ! London  	 (assume      no      irrigation   at             the   moment)
-9
-9