Effect of pattern and density of live windbreak on the wind speed in the Hussein Abad plain, Sarbisheh

Tow important characteristics of arid and semi arid regions are wind and wind erosion which accelerate desertification process. Farmlands are on of the major sources of soil particles detachment and consequent erosion. Windbreak is an effective tool in reducing wind speed and making microclimates in its windward and leeward. Plain of Hussein-Abad Sarbisheh is located under an arid climate condition and Sistan 120-days wind has destructive influence on soil and yield of agricultural fields. In this research، live windbreaks (Zea mays and Sorghum bicolor) were created in different patterns and densities at three replications. Wind speed was monitored in definite distances from windward and leeward of windbreak. Results of data analysis from wind speed monitoring was revealed that triangular arrangement in three densities (i. e.، density of 60 cm in rows) is the most effective pattern in density of windbreak to reduce wind speed and protect high distance from leeward of windbreak and offer this windbreak as effective windbreak in Hussein Abad plain.