I have some wind measurement data for our testing polygon - area approx. 40x50
m - I have data from 4 meteo stations in the area, measured in 2 meters - wind
speed and direction (+ some other data). My colleague asked me, whether it is
possible to somehow transfer this data to a grid - wind field (could be
something like interpolation) - at least for those 2m height and some time (I
have about 1 hour data). My knowledge in this area is very limited and I did
not find such tool in SAGA so I am asking here. thanks
You could simply grid the speed and direction fields, as per http://marinedat
and then display the vector arrows with Select MODULES > SHAPES-GRID >
GRADIENT VECTORS FROM GRIDS. In the module, select INPUT > SLOPE (A) AND
ASPECT (B), where slope is speed and aspect is direction. Keep careful track
of the units, so you label the figure correctly.
If i understand correctly the only think that you have at the moment is 4
points with information about wind speed and direction. You will need
something more than that to create a grid of your wind flow. You can have a
look at the module
Terrain Analysis - Morphometry - Wind Effect . But never understood how this
module works exactly.
There are specific softwares that do that and this is not SAGA. There is an
open source software under OSL v3 called openwind
(http://www.awsopenwind.org/) where you can
import your time series (speed, direction sdv, etc) and you will get a grid
with mean wind speed and dir. Also there are some commercial software for that
windPro, wasp, windFarm..
Then you can import the grid to SAGA.
Hope this helped
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