Use of morphometric analysis and self-organizing maps for alluvial fan classification: case study on Ostorankooh altitudes, Iran

7th IGRSM International Remote Sensing & GIS Conference and Exhibition

地球科学;计算机科学

Mokarram, Marzieh^1 ; Seif, Abdollah^1 ; Sathyamoorthy, Dinesh^2

Deparment of Geographic Sciences and Planning, University of Isfahan, Iran^1

Science and Technology Research Institute for Defence (STRIDE), Ministry of Defence, Malaysia^2

关键词: Alluvial fans;    Braided stream;    Drainage area;    Morphometric analysis;    Morphometric parameters;    Morphometric variables;    Power functions;    Qualitative data;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/20/1/012003/pdf
DOI  :  10.1088/1755-1315/20/1/012003

学科分类：计算机科学（综合）

来源: IOP

【 摘 要 】

The aim of this study is to classify alluvial fans formed by high-gradient braided streams and torrents that discharge into the Oshtorankook altitudes in the Lorestan province, Iran. The morphology of the fans and their watershed is quantitatively described through estimated morphometric parameters. For relationships between geomorphological features of the fans and their drainage basins, self-organizingmaps (SOM) were used. In SOM, according to both qualitative data and morphometric variables, the clustering tendency of alluvial fans was investigated using 15 alluvial fans parameters. The results of the analysis showed that several morphologically different fan types were recognizedbased on their geomorphological characteristics in the study area. A strong positive relationship was found between the drainage basin area and size of the fan with a simple power function. In addition, the relationship between fan slope and drainage area was found to be negative and moderately strong with a simple power function.