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puzzled about Z factor
I am using InVEST 3.3.0 x86 in a small watershed and have some puzzled about how to accurately determine the Z value , I've tried many times and the total amount of water produced in the experiment is always smaller than the natural runoff.
And another puzzled: The PAWC is a fraction from 0 to 1. I use the soil texture data(%clay, %sand, %silt,%oc) which obtained from the World Soil Database provided by FAO to estimate my PAWC.There is no value in the world soil database for waters, buildings, bare land, etc.Can I set PAWC for these places to 1 and the Root restricting layer depth to 0?