Clarity on Log Items & Values?

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Robert Schwiebert

June 04, 2020 12:03

Being the nerd I am, I'd love to find more documentation on the logs and detailed descriptions for what certain things mean or the role they play. I'm mostly curious about the following

	 zone  lastAW  newAW  chEt0  waterFF  corrPast  water%  waterNeeded  fielCap  cropCoef  zoneType  userDuration
	    1    0.18   3.37   4.79    -2.08    -1.12    0.00     -3.37       25.98      0.80       2       1259.00
	    2    0.71   4.51   4.79    -2.65    -1.15    0.00     -4.51       21.92      0.68       2       1303.00
	    3    0.71   4.51   4.79    -2.65    -1.15    0.00     -4.51       21.92      0.68       2       1070.00
	    4    0.18   3.37   4.79    -2.08    -1.12    0.00     -3.37       25.98      0.80       2       1195.00
	    5    0.18   3.37   4.79    -2.08    -1.12    0.00     -3.37       25.98      0.80       2       1237.00

 

If I could get a description of the items in bold, that'd be awesome. Or, if this information already exists somewhere, pointed in the right direction at least.

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  RainMachine Nicholas June 10, 2020 11:34

  zone: The zone number

  lastAW: Last computed soil Available Water 

  newAW: Newly computed soil Available Water 

  chET0: Chosen reference ET0 for this zone (taken from daily year values)

  waterFF: Water for future (this is relative to evapotranspiration that is computed from weather data for the next days - et0Estimate). A trimmed down formula would be: 

  cropCoef * et0Estimate - RainSensitivity * FuturePrecipitationEstimate

  corrPast: Correction for the past. Difference in the et0Estimate computed in the past for last watering versus same et0Estimate computed with newly refreshed data (either better forecast after watering was done or from observed weather data stations)

  water%: Percentage from your set watering duration that would be needed to water (100% waters your full duration entered for each zone)

  waterNeeded: Relative to evapotranspiration. A trimmed down formula: waterNeeded = waterForFuture + correctionForPast - availableWater

  fielCap: Field Capacity this restricts how much Available Water the soil can hold and it's actually fieldCap/2 (to account for both deficit and extra)

  cropCoef: The crop coefficient multiplied with exposure coefficient 

  zoneType: The vegetation type

  userDuration: Your zone duration set in the program.

   

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