4.2.4. SUEWS_Irrigation.txt¶

External water use may be used for a wide range of reasons (e.g. cleaning roads, irrigating plants, fountains, washing cars).

SUEWS has two options for External Water use (if non- zero) 1) provide observed data in meteorological forcing file in the Wuh column with valid values

set WaterUseMethod = 1 in RunControl.nml

2) a simple model that 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 user needs to supply coefficients (XXX) for these relations.

sub-daily pattern of water use is detemined from the daily cycles specified in SUEWS_Profiles.txt.

surface that the water can be applied to is specified by XX.

water can pond

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	`H_maintain`	`MU`	water depth to maintain used in automatic irrigation (e.g., ponding water due to flooding irrigation in rice crop-field) [mm].
7	`Ie_a1`	`MD`	Coefficient for automatic irrigation model [mm d^-1 ]
8	`Ie_a2`	`MD`	Coefficient for automatic irrigation model [mm d^-1 K^-1]
9	`Ie_a3`	`MD`	Coefficient for automatic irrigation model [mm d^-2 ]
10	`Ie_m1`	`MD`	Coefficient for manual irrigation model [mm d^-1 ]
11	`Ie_m2`	`MD`	Coefficient for manual irrigation model [mm d^-1 K^-1]
12	`Ie_m3`	`MD`	Coefficient for manual irrigation model [mm d^-2 ]
13	`DayWat(1)`	`MU`	Irrigation allowed on Sundays [1], if not [0]
14	`DayWat(2)`	`MU`	Irrigation allowed on Mondays [1], if not [0]
15	`DayWat(3)`	`MU`	Irrigation allowed on Tuesdays [1], if not [0]
16	`DayWat(4)`	`MU`	Irrigation allowed on Wednesdays [1], if not [0]
17	`DayWat(5)`	`MU`	Irrigation allowed on Thursdays [1], if not [0]
18	`DayWat(6)`	`MU`	Irrigation allowed on Fridays [1], if not [0]
19	`DayWat(7)`	`MU`	Irrigation allowed on Saturdays [1], if not [0]
20	`DayWatPer(1)`	`MU`	Fraction of properties using irrigation on Sundays [0-1]
21	`DayWatPer(2)`	`MU`	Fraction of properties using irrigation on Mondays [0-1]
22	`DayWatPer(3)`	`MU`	Fraction of properties using irrigation on Tuesdays [0-1]
23	`DayWatPer(4)`	`MU`	Fraction of properties using irrigation on Wednesdays [0-1]
24	`DayWatPer(5)`	`MU`	Fraction of properties using irrigation on Thursdays [0-1]
25	`DayWatPer(6)`	`MU`	Fraction of properties using irrigation on Fridays [0-1]
26	`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