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Article

Episodes 2021; 44(3): 285-297

Published online September 1, 2021

https://doi.org/10.18814/epiiugs/2020/020089

Copyright © International Union of Geological Sciences.

Evaluation of formation mechanism of lakes in terms of morphometric aspect; lakes region and their vicinity, SW of Turkey

by Cem Küçük, Gülcan Sarp*

Suleyman Demirel University, Faculty of Arts & Sciences, Department of Geography, 32260, Isparta, Turkey

Correspondence to:*E-mail address: gsarp_metu@hotmail.com

Received: January 14, 2020; Revised: October 3, 2020; Accepted: October 3, 2020

This is an Open Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/by-nc/4.0) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

The formation mechanism of lakes located on the Lakes Region and their vicinity are assumed to have a tectonic origin but this assumption is still controversial. Because, tectonic movements, volcanic activity, and dissolution of limestone caused the formation of morphologically different type lakes in the region. In this study, Lake Acıgöl, Lake Akşehir, Lake Beyşehir, Lake Burdur, Lake Eğirdir, Lake Çavuşçu, Lake Salda, and Lake Yarışlı, located in the Lakes Region and their vicinity, were taken into consideration to evaluate their formation mechanism in terms of morphometric aspect. In the study, the lake surface areas are extracted from the Sentinel-2 satellite image by applying the Normalized Difference Water Index (NDWI) and Otsu Thresholding methods. Then lake morphology was quantified with morphometric metrics (Elongation Ratio, Compactness, Circularity Ratio) and Main Axis Orientation. The relationships between morphometric parameters and tectonic activity were evaluated by using tectonically active fault lines bounding the lake areas. The results reveal that the digital morphometric approach taken here not only allows more accurate measurement of lake morphology but also sheds light to understand the formation mechanisms of lake areas.