Arid
DOI10.1007/s12517-016-2746-6
Determination of sand dune characteristics through geomorphometry and wind data analysis in central Iran (Kashan Erg)
Samani, Aliakbar Nazari1; Khosravi, Hassan1; Mesbahzadeh, Tayyebeh1; Azarakhshi, Maryam2; Rahdari, Mohammad Reza1
通讯作者Rahdari, Mohammad Reza
来源期刊ARABIAN JOURNAL OF GEOSCIENCES
ISSN1866-7511
EISSN1866-7538
出版年2016
卷号9期号:18
英文摘要

The combination of wind measurements and remotely sensed geomorphometry indices provides a valuable resource in the study of desert landforms, because arduous desert environments are difficult to access. In this research, we couple wind data and geomorphometry to separate and classify different sand dunes in Kashan Erg in central Iran. Additionally, the effect of sand-fixing projects on sand dune morphology was assessed using geomorphometry indices (roughness, curvature, surface area, dune spacing and dune height). Results showed that a Digital Elevation Model of the National Cartographic Center of Iran (NCC DEM) with 10-m resolution and accuracy of 54% could discriminate geomorphometry parameters better than the Advanced Spaceborne Thermal Emission and Reflection Radiometer (ASTER) data with 30-m resolution and Shuttle Radar Topography Mission (SRTM) data with 90-m resolution and 45.2 and 1.6% accuracy, respectively. Low classification of SRTM DEM was associated with too many non-value points found in the DEM. Accuracy assessment of comparison ground control points revealed that ASTER DEM (RMSE = 4.25) has higher accuracy than SRTM and NCC DEMs in this region. Study of curvature showed that transverse and linear sand dunes were formed in concave topography rather than convex. Reduced slopes in fixed sand dunes were established due to wind erosion control projects. Measurements of dune height and spacing show that there is significant correlation in compound dunes (R-2 = 0.546), linear dunes (R-2 = 0.228) and fixed dunes (R-2 = 0.129). In general, the height of dunes in Kashan Erg increases from the margin of the field to the center of the field with a maximum height of 120 m in star dunes. Analysis of wind data showed that sand drift potential is in low-medium class in Kashan Erg. Linear sand dunes in Kashan Erg show that they are following a global trend in forming of these. Finally, established of geomorphometry method in dune classification will help researchers to identify priority of land management and performance assessment of sand dunes fixing projects in arid arduous environment.


英文关键词Geomorphometry Dune classification Sand drift potential Discriminant analysis Kashan Erg Iran
类型Article
语种英语
国家Iran
收录类别SCI-E
WOS记录号WOS:000390014100017
WOS关键词SEMIARID REGIONS ; SISTAN REGION ; DESERT ; DYNAMICS ; IDENTIFICATION ; VEGETATION ; MANAGEMENT ; PROVINCE ; NABKHAS ; SHRUBS
WOS类目Geosciences, Multidisciplinary
WOS研究方向Geology
资源类型期刊论文
条目标识符http://119.78.100.177/qdio/handle/2XILL650/191476
作者单位1.Univ Tehran, Fac Nat Resource, Karaj, Iran;
2.Univ Torbat E Heydarieh, Agr & Nat Resource Faulty, Torbat E Heydarieh, Iran
推荐引用方式
GB/T 7714
Samani, Aliakbar Nazari,Khosravi, Hassan,Mesbahzadeh, Tayyebeh,et al. Determination of sand dune characteristics through geomorphometry and wind data analysis in central Iran (Kashan Erg)[J],2016,9(18).
APA Samani, Aliakbar Nazari,Khosravi, Hassan,Mesbahzadeh, Tayyebeh,Azarakhshi, Maryam,&Rahdari, Mohammad Reza.(2016).Determination of sand dune characteristics through geomorphometry and wind data analysis in central Iran (Kashan Erg).ARABIAN JOURNAL OF GEOSCIENCES,9(18).
MLA Samani, Aliakbar Nazari,et al."Determination of sand dune characteristics through geomorphometry and wind data analysis in central Iran (Kashan Erg)".ARABIAN JOURNAL OF GEOSCIENCES 9.18(2016).
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