To adjust the crop coefficient (Kc) in eVineyard :
Advanced/edit vineyard blocks/select Block 1/vineyard/Canopy Width
Change canopy width according to the measured average shadow width at noon.
Do this for all your vineyard blocks.
The vine spacing is assumed to be fixed (for VSP training = distance between vines and row width)
For reference: https://www.yumpu.com/en/document/read/25179133/irrigation-of-winegrapes-in-california-by-larry-williams