نوع مقاله : مقاله پژوهشی
نویسندگان
1 استاد ژئومورفولوژی، دانشگاه تهران، تهران، ایران
2 دانشجوی دکتری ژئومورفولوژی، دانشگاه تهران، تهران، ایران
چکیده
کلیدواژهها
موضوعات
عنوان مقاله [English]
نویسندگان [English]
Ergs are a collection of dunes of various shapes and sizes. One of the characteristics of dunes is their active dynamics, which are considered a serious threat to residential areas and human activities. Dunes in Sistan and Baluchestan provinces have high morphological diversity and are dynamically active, which is why this study examined their morphological and dynamic status. This research was based on remote sensing methods and statistical information. In this study, satellite images and statistical information related to the speed and direction of the winds in the region were used as the most important research data. ArcGIS and WRplot software were the most important research tools. In this study, the morphological and dynamic status of dunes was first examined, and then their relationship with the speed and direction of the winds of the region and human activities was analyzed. The results of this study have shown that of the total 1068 square kilometers of the Sistan Dune, about 60 percent of it is covered by simple crescent dunes, and given that the average movement of the dunes of this dune has been between 2 and 90 m (during the years 2005 to 2020), it is therefore dynamically active. In addition, the results of the analysis of the winds of the region have shown that the northern areas of the Sistan Dune have the highest average wind speed, but because the dunes have been fixed by human activities, they have had the least amount of movement, but the dunes of the southern areas have had more movement due to less vegetation cover and the absence of geomorphological barriers.
کلیدواژهها [English]