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dmpstats / stochCRM

Graphical User Interface (GUI) developed for a stochastic avian Collision Risk Model (CRM)
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windpark positioned in a cluster #25

Open JeMoJo opened 3 years ago

JeMoJo commented 3 years ago

I'm using the online model to calculate the impact of windturbines on birds. The standard model seems to assume that the turbines are positioned in a row (see 'width' in the 'wind farm features' box). However, for some of the situations I want to calculate have clustered turbines (they have no line positioning)? Can I let the model calculate a clustered windpark?

grwhumphries commented 3 years ago

Heya, I can probably answer here somewhat. the WF Width is just used in the Large Array correction factor, if your array is relatively small, then you can essentially ignore this and turn off the Large Array correction factor. If you're needing the large array correction, it is currently only tuned to assuming turbine rows. The function looks like this (found in BandModel_function.R): 

      ############## STEP THREE - Calculate Large Array Correction Factor

          ## calculate number of turbine rows - manually enter if appropriate

          NTurbRows = NTurbines ^ 0.5

          CollRiskSinglePassage = NTurbines * (pi * sampledTurbine$RotorRadius[i]^2)/(2 * sampledTurbine$RotorRadius[i] * WFWidth * 1000) * 
            (P_Collision/100) * (MeanOperational[i]/100) * (1-sampledBirdParams$AvoidanceBasic[i])

          L_ArrayCF = 1 - (NTurbRows - 1) / (2*NTurbRows) * CollRiskSinglePassage + 
            (NTurbRows - 1) * (2*NTurbRows)/(6 * NTurbRows^2) * (CollRiskSinglePassage ^2)
JeMoJo commented 3 years ago

Thanks, after looking at your answer and formula my question is answered.