Introduction Representation in WAsP
Introduction Representation in WAsP
Introduction Representation in WAsP
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Results: ”bad” mast pairs <strong>in</strong>cludedRMS errors are much largerDisplacement height decay rate has a dramatic effect: The slower the decay, the betterNo clear w<strong>in</strong>ner, a couple of clear losersWhat determ<strong>in</strong>es who w<strong>in</strong>s and who loses?Comparison of canopy models ("bad" mast pairs <strong>in</strong>cluded)RMS error on mean w<strong>in</strong>d speed9.0%8.0%7.0%all mast pairs6.0%5.0%4.0%3.0%2.0%1.0%good mast pairs only0.0%0 10 20 30 40 50 60<strong>WAsP</strong> manual z0=0.4m<strong>WAsP</strong> manual z0=0.8mCurrent GHJarvis et al.GarratKaimal&F<strong>in</strong>niganESDU1/s Displacement height <strong>in</strong>verse decay rateDisplacement height and roughness length8.0%8.0%7.0%7.0%Kaimal &F<strong>in</strong>niganRMS error on mean w<strong>in</strong>d speed6.0%5.0%4.0%3.0%2.0%1.0%R 2 = 0.55R 2 = 0.61R 2 = 0.32all pairs,s=1:15all pairs,s=1:50goodpairs,s=1:15RMS error on mean w<strong>in</strong>d speed6.0%5.0%4.0%3.0%2.0%1.0%R 2 = 0.11R 2 = 0.13R 2 = 0.69all pairs,s=1:15all pairs,s=1:50goodpairs,s=1:150.0%0.6 0.8 1 1.2d/h0.0%0.2 0.4 0.6 0.8 1 1.2 1.4 1.6 1.8z0 (m) for tree height = 12.5 m
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