نوع مقاله : مقاله پژوهشی
نویسندگان
1 گروه جغرافیای طبیعی، دانشکده ادبیات و علوم انسانی، دانشگاه فردوسی مشهد، مشهد، ایران
2 گروه مدیریت مناطق بیابانی، دانشکده منابع طبیعی و محیط زیست، دانشگاه فردوسی مشهد، مشهد، ایران
3 گروه جغرافیا، دانشگاه پیام نور، تهران، ایران
چکیده
کلیدواژهها
عنوان مقاله [English]
نویسندگان [English]
Introduction
A dust storm is a common environmental hazard in the Iran, especially in Khuzestan province. It is important to
note that the temporal and spatial variations of dust cause the dust to diffuse from different facies. Accordingly,
various methods have been developed to identify dust sources, most notably the use of field and laboratory work.
Therefore, in this study, we study the internal dust sources and different facies capabilities for producing dust
from western Khuzestan.
Materials and Methods
In this study, first, a spatial map of the facies was prepared in which the Landsat 8 and Sentinel 1 satellite images
were used on 21/4/2018. Then, three metal rods were planted in all faces using fieldwork. Then the height
difference of the rods was measured in three consecutive time periods after the dust storms in winter and spring
2018. Also, surface samples (0-3 cm) were collected at the rod location. The samples were transferred to Ferdowsi
University laboratory and grain size analysis was performed. Finally, a hydrometric test was carried out to
determine soil mineral and soil texture.
Results and Discussion
The results showed that the sediments are predominantly fine-grained, with the highest accumulation of sediment
under the sieve of the shaker. Also, Hydrometric results indicated that the Jofer area has silty clay loamy soil and
in the dry bed samples of the Hoor_Al_Azim Wetland and north Susangerd, the results are similar to the Jofer
area. Assessment of the rods illustrated that bed sediments were transported at the time of dust formation. The
maximum displacement was measured at the location bed S4, S5, and S6 with a difference of more than 5 cm.
Conclusion
In this study, the internal dust sources were studded and different facies capabilities for producing dust from
western Khuzestan were measured. Results indicate the sediments due to environmental conditions are not
coherent and have no solidarity. In addition, internal border sources of dust have been found to play a major role
in the spread of dust in western Khuzestan.
کلیدواژهها [English]