Tool ETpot (after Hargreaves, Grid)
Estimation of daily potential evapotranspiration from daily average, minimum and maximum temperatures using Hargreave's empirical equation. In order to estimate extraterrestrial net radiation geographic latitude of observation and Julian day have to be supplied too.
- Author: O.Conrad (c) 2015
- Menu: Climate|Evapotranspiration
Parameters
| | Name | Type | Identifier | Description | Constraints |
|---|
| Input | Mean Temperature | Grid (input) | T | - | - |
| Minimum Temperature | Grid (input) | T_MIN | - | - |
| Maximum Temperature | Grid (input) | T_MAX | - | - |
| Output | Potential Evapotranspiration | Grid (output) | PET | - | - |
| Options | Grid system | Grid system | PARAMETERS_GRID_SYSTEM | Grid system | - |
| Latitude [Degree] | Floating point | LAT | - | Minimum: -90.000000
Maximum: 90.000000
Default: 53.000000 |
| Time | Choice | TIME | - | Available Choices:
[0] day
[1] month
Default: 0 |
| Month | Choice | MONTH | - | Available Choices:
[0] January
[1] February
[2] March
[3] April
[4] May
[5] June
[6] July
[7] August
[8] September
[9] October
[10] November
[11] December
Default: 9 |
| Day of Month | Integer | DAY | - | Minimum: 1
Maximum: 31
Default: 18 |
Command-line
Usage: saga_cmd climate_tools 8 [-T <str>] [-T_MIN <str>] [-T_MAX <str>] [-PET <str>] [-LAT <double>] [-TIME <str>] [-MONTH <str>] [-DAY <num>]
-T:<str> Mean Temperature
Grid (input)
-T_MIN:<str> Minimum Temperature
Grid (input)
-T_MAX:<str> Maximum Temperature
Grid (input)
-PET:<str> Potential Evapotranspiration
Grid (output)
-LAT:<double> Latitude [Degree]
Floating point
Minimum: -90.000000
Maximum: 90.000000
Default: 53.000000
-TIME:<str> Time
Choice
Available Choices:
[0] day
[1] month
Default: 0
-MONTH:<str> Month
Choice
Available Choices:
[0] January
[1] February
[2] March
[3] April
[4] May
[5] June
[6] July
[7] August
[8] September
[9] October
[10] November
[11] December
Default: 9
-DAY:<num> Day of Month
Integer
Minimum: 1
Maximum: 31
Default: 18