Related Links
Quantitative Modeling of Dunefields High and Space Using Geomorphometric Studies in Central Deserts of Iran | ||
| تحقیقات مرتع و بیابان ایران | ||
| Article 18, Volume 24, Issue 1, May 2017, Pages 210-223 PDF (666.31 K) | ||
| Document Type: Research Paper | ||
| DOI: 10.22092/ijrdr.2017.109861 | ||
| Authors | ||
| ali nazari* ; hamidreza abbasi; hasan ahmadi; mohammadreza rahdari | ||
| Abstract | ||
| This research was aimed to modeling the height and distance of sand dunes in central deserts of Iran (Kashan Erg and Jen Erg) as well as their classification. Results of identifying sand dunes in the study areas showed that there were considerable variations in formation of sand dunes in central deserts of Iran. Quantitative modeling of height based on DEM (80 × 80m) showed that the average height of sand dunes in Kashen Erg and Jen Erg was 35m and 6.84m, respectively. The reduced height in Jen Reg was due to the 37% frequency of sand dunes area and regardless of these dunes, the average height was calculated to be 8.63 m in Jen Reg, of which 90% was in a height class less than 20 m. On the other hand, the frequency percentage variation of sand dunes height classes is higher in Kashan Erg, so that over 80% of Kashan Erg is in a height class less than 50m, while 87% of Jen Erg is in a height class less than 10m. In Kashan Erg, the height of sand dunes is low and gradually increases in the center of Erg, reaching to the highest height of sand dunes. Quantitative modeling of relations between the height and distance of dunes in Jen Erg indicated that the sand dunes activity was restricted to the upper part of the dunes. In Kashan ERG, the comparison of fixed, linear and compound dunes showed that the fixed dunes would be formed at a closer distance as compared with two other types. | ||
| Keywords | ||
| modeling; Geomorphometric; High and Space of Dunefields; Kashan Erg; Jen ERG | ||
| References | ||
|
Ahmadi, H., 2008. Applied Geomorphology. University of Tehran, Tehran, Iran, 706p. Allen, J. R. L., 1970, The avalanching of granular solids on dune and similar slopes. The Journal of Geology, 326-351. Al-Masrahy, M. A. and Mountney, N. P, 2013. Remote sensing of spatial variability in aeolian dune and interdune morphology in the Rub’Al-Khali, Saudi Arabia. Aeolian Research, 11, 155-170. Bagnold, R. A., 1941. The physics of wind blown sand and desert dunes. Methuen, London. Barrineau, P., Dobreva, I., Bishop, M. P. and Houser, C., 2016. Deconstructing a polygenetic landscape using LiDAR and multi-resolution analysis. Geomorphology, 258, 51-57. Bourke, M., Balme, M., Beyer, R. and Williams, J., 2006. A comparison of methods used to estimate the height of sand dunes on Mars. Geomorphology, 81, 440-452. Bourke, M., Edgett, K. and Cantor, B., 2008. Recent aeolian dune change on Mars. Geomorphology, 94, 247-255. Bubenzer, O. and Bolten, A., 2008. The use of new elevation data (SRTM/ASTER) for the detection and morphometric quantification of Pleistocene megadunes (draa) in the eastern Sahara and the southern Namib. Geomorphology, 102(2), 221-231. Carrigy, M.A., 1970. Experiments on the angles of repose of granular materials1. Sedimentology, 14,147-158. Fatahi, S., 2014. Review of Jen ERG Granulometry and morphometry using wind characteristic analysis and sand dunes morphology. M.Sc Thesis, Natural Resource Faulty, University of Tehran, Iran. Fitzsimmons, K. E., 2007. Morphological variability in the linear dunefields of the Strzelecki and Tirari deserts, Australia. Geomorphology, 91, 146–160. Goudie, A. S., 1999. The history of desert dune studies over the last 100 years. 98-137. In: AS Goudie, I Livingstone, S Stokes (Eds), Aeolian Environments, Sediments and Landforms, Wiley, London. HACK, J., 1957. Submerged river system of Chesapeake Bay. Geological Society of America Bulletin, 68(7), 817-830. Hugenholtz, C. H. and Barchyn, T. E., 2010. Spatial analysis of sand dunes with a new global topographic dataset: new approaches and opportunities. Earth Surface Processes and Landforms, 35(8), 986-992. Hugenholtz, C. H., Levin, N., Barchyn, T. E. and Baddock, M. C., 2012. Remote sensing and spatial analysis of aeolian sand dunes: a review and outlook. Earth-Sci. Rev, 111, 319–334. Lancaster, N., 1988. Controls of eolian dune size and spacing. Geology, 16(11), 972-975. Leopold, L. B. and Maddock J, T., 1953. The hydraulic geometry of stream channels and some physiographic implications,No. 252. Pike, R. J. and Dikau, R., 1995. Advances in geomorphometry. N. F. Suppl. Bd, 101- 238. Pike, R. J., 2000. Geomorphometry diversity in quantitative surface analysis. Progress in Physical Geography, 24(1), 1–20. Porter, M., 1986. Sedimentary record of erg migration. Geology, 14, 497-500. Pye, K. and Tsoar, H., 2008. Aeolian sand and sand dunes. Springer Science & Business Media, 416p. Rahdari, M. R., 2014. Classification of sand dunes base on the geomorphometric characteristics. M.Sc. thesis, Natural Resource Faulty, University of Tehran, Iran. Rittner, M., Vermeesch, P., Carter, A., Bird, A., Stevens, T., Garzanti, E. and Lu, H., 2016. The provenance of Taklamakan desert sand. Earth and Planetary Science Letters, 437, 127-137. Shao, Y., 2008. Physics and modelling of wind erosion. Springer Science & Business Media, Germany,147p. Sharp, R. P., 1963. Wind ripples. The Journal of Geology, 617-636. Strahler, A. N., 1952. Dynamic basis of geomorphology. Geological Society of America Bulletin, 63(9), 923-938. Thomas, D. S. G., 1988. Analysis of linear dune-sediment-form relationships in the Kalahari dune desert. Earth Surface, Processes Landforms, 13, 545–553 Wasson, R. J., Fitchett, K., Mackey, B. and Hyde, R., 1988. Large-scale patterns of dune type, spacing and orientation in the Australian continental dunefield. Australian Geographer, 19, 89–104. White, K., Bullard, J., Livingstone, I. and Moran, L., 2015. A morphometric comparison of the Namib and southwest Kalahari dunefields using ASTER GDEM data. Aeolian Research, 19, 87-95. Wilson, I. G., 1972. Aeolian bedforms – their development and origins. Sedimentology, 19, 173–210. Yang, X., Scuderi, L., Liu, T., Paillou, P., Li, H., Dong, J. and Weissmann, G., 2011, Formation of the highest sand dunes on Earth. Geomorphology, 135(1), 108-116. | ||
|
Statistics Article View: 1,127 PDF Download: 514 |
||
Journal management system. designed by sinaweb