Classification of pediments based on a geomorphometric approach in Ashkezar zone, Yazd

Document Type : Research Paper

Authors

1 Assistant Professor, Department of Geomorphology, Faculty of Geographical Sciences, Kharazmi University of Tehran

2 Ph.D. student of geomorphology, Faculty of Geographical Sciences, Kharazmi University of Tehran

Abstract

Pediments are one of the most important natural formations whose identification and classification helps to make geomorphological maps. In general, pediments are divided into three types: eroded, mantled, and covered. The dominant approach in identifying types of plains is the visual interpretation of low-velocity aerial and satellite data and dependency on the interpreter's background knowledge. Nowadays, a geomorphometric approach based on measuring geomorphological forms can help to identify landforms. In this research, based on the geomorphometric approach and using the ASTERGDEM digital elevation model, the curvature indices and the RTP index of various plains in Ashkezar area of Yazd are identified and extracted. The results show that the geomorphometric indices including profile curvature, planimetric curvature, longitudinal curvature and general curvature have a good resolution to differentiate the different types of plains from one another. Due to the differences among the calculated mean values for the mentioned parameters, it is possible to classify pediments. Of the parameters studied, In addition, the profile and planimetric curvatures and the RTP index the most accurate parameters for the classification of pediments.

Keywords

References

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The Journal of Geographical Research on Desert Areas
Volume 7, Issue 2
March 2020
Pages 173-192

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