Assessment of Wind Characteristics and Wind Power Potential of Gharo, Pakistan

Table 2

Typical values of surface roughness length and power law exponent.

Terrain	Z0	Α
Ice, mud flat	10^−3∼310^−3	—
Calm sea	210^−4∼310^−4	—
Sand	210^−4∼10^−3	0.01
Mown grass	0.001∼0.01	—
Low grass	0.01∼0.04	0.13
Fallow field	0.02∼0.03	—
High grass	0.04∼0.1	0.19
Forest and wood land	0.1∼1	—
Suburb or built area	1∼2	0.32
Town, city	1∼4	—