Assessment of the risks of wind deposits in the Sistan plain and its effect on the vital reservoirs of Chahnimeh Zabol

The purpose of this research is to assess the risks of wind-blown sediments in the Sistan Plain and its impact on Chahnimeh vital reservoirs in the two critical centers of Niatek and Jezink in the southeast of Zabol, Sistan and Baluchistan province. The results aimed to provide the possible causes of damage to facilities, agriculture, roads, and damages to the region, and especially its effects on Chahnimeh water reservoirs.

The method of conducting this research was field surveys, aerial photographs, satellite images with different time periods, surveying the general morphology and winds of the region (The 120-day wind) and locating in terms of studying the geomorphology of the region. In this research, topographic maps, geological maps, computer software such as ENVI and GIS were used. Sampling of sediments (sedimentology and drawing relevant diagrams) and XRF (X-ray fluorescence) laboratory studies, comparative analysis and data analysis method has been done.

According to the results of the research, the main risk factors are the erosive winds of the region, which have a north to northwest direction with an angle of 330 to 360 degrees (the 120-day wind of Sistan), and the most important areas of harvest, abandoned lands, sandy lands, and salty and swollen areas of the Hamun lake bed. and the northern plains (Afghanistan). The interpretation of topographical maps and satellite images in different years showed that the speed and direction of movement of the sand dunes in the region are proportional to the prevailing wind of 120 days and in the northwest-southeast direction. In addition, the height of sand dunes and the volume of sand are an important factor in the speed of movement and the amount of progress of sand dunes in the Sistan Plain and entering the Chahnimeh reservoirs.