بررسي روش هاي كنترل فرسايش بادي براي حفاظت راه آهن

Control Methods of Wind Erosion for Railroads Protection (Case study: Bafgh Region)

Southern areas of Bafgh are located in central arid areas of Iran, with little amounts of precipitation and vegetation cover. Blowing of strong wind over these bare areas causes wind erosion and destroyer soils texture, which result in rail roads damage specially Tehran-Bandar Abbas in southern Bafgh and also in damage to farmlands and neighboring villages. By accumulation of moving sands in southwest Bafgh, an erg of 37 km^2 areas was made. In order to control wind erosion in these areas, source of aeolian deposits were determined using stepwise determination method. Investigations showed that erosive wind blew from southwest and transported aeolian sands, depositing them on sand dune areas. Geomorphological studies and mineralogy showed that source of sand dunes were local and near them, including some part of pediment in southwest of erg, Zarand Shoor dry river, and wind erosion facies in these areas. Generally, the main source of aeolian deposits extended from sand dune areas to Zarand shoor dry river, and secondary source sandy desert nearby.