hi invest team Have a cordial greeting, I am doing a job in Colombia with the annual water yield model, for the calculation of the Z parameter, the equation of the user guide must be applied. I have several doubts regarding the obtaining of the AWC variable and the formula, 1) the raster of the mi…

Hi @felipeskull - I’m not exactly sure what your questions are, but perhaps it would help to see more of a step-by-step process than what is currently included in the User Guide? 1/ Create a root depth raster by mapping the root_depth column of the biophysical table to your land use/land cover (LU…

The question would be, should I create a root depth raster of the biophysical table, then do the calculation to obtain the minimum of the 2 rasters, …?? and finally apply the true equations…

Yes @felipeskull , create the root depth raster from the biophysical table. ~ Stacie

hello, I have another question, the equation to find AWC, is a multiplication of the three raster

Yes, you’ll use rasters to calculate an AWC raster, then find the average value within the AWC raster to use in the Z equation. ~ Stacie

hello I elaborated the two rasters, the root depth raster and the effective soil depth raster, I used the minimum function to obtain two rasters, when performing the operation between the three rasters the result is not very different from the raster of PAWC, then I use a function in Arcgis to obta…

Hi @felipeskull - I just noticed that I made a mistake in the steps I outlined previously. Step 3 should be: 3/ Calculate AWC using the equation in Appendix 1 of the User Guide , using the output of step 2 and the PAWC raster you’re using as a model input. Previously it said to use the output of …

hola @swolny I was searching the internet and the only thing I found was an arcgis function to obtain the minimum, but I did not obtain the required results, since I obtained a raster with the value of 1, if you could tell me how are the steps to obtain the minimum, with arcgis using the calculator…

@felipeskull , there may be other ways to do this, but I’d use Raster Calculator with the Con tool: Con("soil_depth.tif" < "root_depth.tif", "soil_depth.tif", "root_depth.tif") This says: For each pixel, if soil_depth.tif is less than root_depth.tif, write the value of soil_depth.tif to the output …

Z parameter calculation

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Z parameter calculation

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