An Overview of Wind Resource Assessments With Special Reference to The Emirate of Ajman, UAE | Renewable Energy and Environmental Sustainability

Achieving Zero Carbon Emission by 2030

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Table 1

Surface friction lengths (Zo) and minimum friction heights (Zmin) (Adopted from Euro Code).

Terrain No	Terrain type	Z_o (m)	z_min (m)
0	Coastal areas exposed to open sea	0.003	1
I	Lake shores and flat open areas with no obstacles	0.01	1
II	Areas with low vegitaton and isolated obstacles where the average obstacle separation is more than 20 times the average obstacle height.	0.05	2
III	Villages and suburbs, where the average obstacle separation is less than 20 times the average obstacle height.	0.3	5
IV	City centers and similar areas, where more than %15 of the terrain is covered with structures taller than 15 m.	1.0	10

Z₀, surface friction length in metres. Z_min, minimum friction height in metres where the surface friction is constant.

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