Figure 5.

Standard deviation in power removed in GW (left-hand axes) and ratio of relative standard deviation in power to relative input standard deviation (right-hand axes) in the fully spanned (a), asymmetrically confined (b), and laterally confined (c) fence deployment scenarios as a function of scaled turbine drag coefficient $C_t/{\mu }_{C_d}$ for different values of mean bed roughness coefficient ${\mu }_{C_d}=\{0.0025,0.005,0.016\}$ (blue, red and green, respectively). The input relative standard deviation in all cases is ${\hat{\sigma }}_{C_d}^{\ast }=0.3$. Asterisks indicate the location of (deterministic) optimal turbine drag.