Knowledge Resource Center for Ecological Environment in Arid Area
DOI | 10.1007/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
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ISSN | 1866-7511 |
EISSN | 1866-7538 |
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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