Dominant processes causing the Formation of Coastal Sand Masses, Case study: Western Makran Coastal Plain

The instability and mobility of sand dunes is a major concern of planning and management in arid coastal plain. Usually, the dune systems are created based on several factors and elements. In order for environmental planning and management in coastal zone, the study of their formation and development process has a major task. The present study is dale with factors identify for sand masses main processes and formed in western part of Makran coastal plain. Data set consist of spatial map of landforms distributions, winds velocities and directions, fetch length as well as dynamic waves were collected and processed. These data along with thematic maps of geology and topography as well as remotely sensed data (satellite images and aerial photographs) were used for further processing and analysis. The Geomorphologic units map was generated as first step. Next wind and wave rose's diagrams were provided. Furthermore, elongation and direction of sand masses movements was extraction form multi-temporal and multisensory data. Main rivers monthly discharges were analysis related to their hydrometric water stations and previous studies. Results indicate that location and distribution of coastal sand masses isn’t functioned by wind; it's more affected by the geomorphologic characteristics of foreshore and coastal hydrodynamics. Also distribution of internal sand masses on coastal plain is more affected by the plain stretches relative to the prevailing wind direction and to the extent of the old beds and floodplain that are exposed along to the prevailing wind nether than wind function.