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


Kucuk C., SARP G.

EPISODES, vol.44, no.3, pp.285-297, 2021 (Journal Indexed in SCI) identifier identifier

  • Publication Type: Article / Article
  • Volume: 44 Issue: 3
  • Publication Date: 2021
  • Doi Number: 10.18814/epiiugs/2020/020089
  • Title of Journal : EPISODES
  • Page Numbers: pp.285-297

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 dif-ferent type lakes in the region. In this study, Lake Acigol, Lake Aksehir, Lake Beysehir, Lake Burdur, Lake Egirdir, Lake cavuscu, Lake Salda, and Lake Yarisli, located in the Lakes Region and their vicinity, were taken into consider-ation 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 apply-ing 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 Orienta-tion. 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 mecha-nisms of lake areas.