Research Article
Determination of the Surface Roughness Parameter and Wind Shear Exponent of Kisii Region from the On-Site Measurement of Wind Profiles
Table 2
Extrapolated average wind speeds at different hub heights using site specific wind shear exponent and constant shear exponent (1/7).
| Month | Hub Height | Average wind speed for Nyamecheo Station | Average wind speed for KSU Station | Average wind speed for Ikobe station | | | | | | |
| FEBRUARY | 20 | 1.64 | 2.56 | 3.05 | 3.67 | 2.09 | 2.73 | 30 | 1.74 | 3.53 | 3.24 | 4.33 | 2.22 | 3.38 | 50 | 1.87 | 5.28 | 3.49 | 5.34 | 2.39 | 4.43 | 70 | 1.97 | 6.88 | 3.67 | 6.13 | 2.47 | 5.30 |
| MARCH | 20 | 1.11 | 2.00 | 2.52 | 3.03 | 1.59 | 2.06 | 30 | 1.17 | 3.00 | 2.68 | 3.58 | 1.69 | 2.55 | 50 | 1.26 | 5.00 | 2.88 | 4.41 | 1.82 | 3.33 | 70 | 1.33 | 7.00 | 3.03 | 5.06 | 1.91 | 3.96 |
| APRIL | 20 | 1.12 | 1.92 | 2.21 | 2.66 | - | - | 30 | 1.18 | 2.80 | 2.35 | 3.14 | - | - | 50 | 1.27 | 4.51 | 2.53 | 3.87 | - | - | 70 | 1.34 | 6.16 | 2.66 | 4.44 | - | - |
| MAY | 20 | 1.29 | 2.22 | 2.90 | 3.48 | ā | - | 30 | 1.37 | 3.23 | 3.08 | 4.11 | - | - | 50 | 1.47 | 5.20 | 3.31 | 5.07 | - | - | 70 | 1.55 | 7.11 | 3.48 | 5.82 | - | - |
| JUNE | 20 | 1.12 | 1.92 | 2.56 | 3.07 | - | - | 30 | 1.18 | 2.80 | 2.71 | 3.62 | - | - | 50 | 1.27 | 4.50 | 2.92 | 4.47 | - | - | 70 | 1.34 | 6.16 | 3.07 | 5.13 | - | - |
| JULY | 20 | 1.65 | 2.84 | 3.65 | 4.38 | - | - | 30 | 1.75 | 4.14 | 3.87 | 5.18 | - | - | 50 | 1.88 | 6.66 | 4.17 | 6.38 | - | - | 70 | 1.99 | 9.10 | 4.38 | 7.33 | - | - |
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