Statistical analysis of the geological shape of coastal desert nebkas adjacent to the Persian Gulf in order to stabilize quicksands and land use changes of nebkazars (Case study: Hormozgan, Sirik)

Plant species that make up nebkas are important elements that stabilize quicksands and have the ability to survive under wind sedimentshe aim of this study was to statistically analyze the geomorphological characteristics and sediments of Nebka sediments in order to stabilize quicksands in the Sirik region of Hormozgan province. In the present study, 3 regions, in each region, 5 representative regions and in each representative region, 10 transects of 1000 meters with a distance of 500 meters from each other and perpendicular to each other were placed in each linear transect. In each nebka, nebka height, nebka length and base of nebka, canopy diameter, nebka volume, nebka base diameter and nebka sand stabilization area were measured. Also, to determine the amount of geomorphological changes of the sampled nebkas during the 30-year period, Landsat satellite images of OLI sensor from 1990 and 2020 were used. Then, using ENVI 5.3 software, the area's wells and other existing uses were determined. The results showed that there was a significant difference between the variables in the three regions at the level of 95%. With the increase of plant height in Sirik from 1.7 to 2.2 meters, the volume of sediment dune increases from 15 to 72 cubic meters and in Mishi region with increasing plant height from 1.65 to 3.5 meters, the volume of sediment from 15 to 45 Cubic meters has increased. Also, the study of changes in the area of nebkas in the region during the last 30 years using satellite image processing showed that the area of nebkas in the region has decreased from about 67 hectares in 1369 to about 59 hectares in 1399. Due to the importance of nebkas, efforts should be made to protect them and these destroyed areas should be rehabilitated with salvadora persica seedlings.