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Table 2 Classification of wind resource and extent of associated land areas

From: Wind energy potential and cost estimation of wind energy conversion systems (WECSs) for electricity generation in the eight selected locations of Tigray region (Ethiopia)

Wind resource category

Wind class

Wind power density (W/m2)

Wind speed at 50 m (m/s)

Total area (km2)

Poor

1

50–200

3.5–5.6

564,600

Marginal

2

200–300

5.6–6.4

96,801

Moderate

3

300–400

6.4–7.0

42,935

Good

4

400–500

7.0–7.5

23,975

Excellent

5

500–600

7.5–8.0

6529

Excellent

6

600–800

8.0–8.8

3814

Excellent

7

Above 800

Above 8.8

1715

Total area covered by poor-to-excellent wind regions

740,376