# Calibration SWY (Qf+B)

**URL:** <https://community.naturalcapitalalliance.org/t/calibration-swy-qf-b/3054>\
**Category:** Software Support\
**Tags:** seasonal-water-yield\
**Created:** [September 16, 2022, 2:22am UTC](https://community.naturalcapitalalliance.org/t/calibration-swy-qf-b/3054 "2022-09-16T02:22:57Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![BiancaBendito](https://yyz1.discourse-cdn.com/flex031/user_avatar/community.naturalcapitalalliance.org/biancabendito/32/1792_2.png) [@BiancaBendito](https://community.naturalcapitalalliance.org/u/BiancaBendito)\
**Post date:** [September 16, 2022, 2:22am UTC](https://community.naturalcapitalalliance.org/t/calibration-swy-qf-b/3054/1 "2022-09-16T02:22:57Z")

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Good night guys.

I have a question about SWY calibration with the sum of QF and B. I know you don’t recommend calibrating the model with the sum, but I’m trying to do that.

Well, I would like to know if the steps are correct:

1- I take the average of Qf and B. I did this by looking at the raster in arcgis, I clicked on properties, then on source and I saw the average. Is this correct?

2- After that, I converted the average from "mm’ into “m” by multiplying per \*0.001 and then I converted it into m3 by multiplying per the basin area (5507608768.42 m2). The result was m3/year. Then I converted it into m3/ second by dividing per 31557600 seconds (number of seconds in a year).

My question is: should I compare the simulated data with the total observed data or with the average of the observed data?

I calculated the average of the observed daily data to obtain the average value for each month of a year, then I added the 12 averages and obtained the annual values. Is this correct?  
Instead of adding the 12 averages, should I take the average between them to obtain the average value for a year and then compare it with the simulated data?