Abstract: Due to the negligence at each stage of the wind farm project in mountainous terrains: investigation, design and construction, large areas of erosions and even landslides on the sloped surface are frequently occurred after heavy precipitations. These geohazards are adversely affected the safe operation of the wind farms. Factors that affect the erosions are evaluated and preventive conservation measures, such as, appropriate disposal of construction spoils; proper drainage system; slope stability measures are suggested.

Key words: Wind Farms in Mountainous Terrain, Soil and Water Conservation Measures, Construction Spoils, Vegetation Measures