1. YEŞİLIRMAK DELTASI'NDA KIYI EROZYONUNUN DOĞRUSAL REGRESYON ORANI YÖNTEMİYLE ANALİZİ.
- Author
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ÖZTÜRK, Derya and UZUN, Sibel
- Subjects
- *
REMOTE sensing , *SHORELINES , *EROSION - Abstract
This study investigated erosion along the approximately 18.5 km coastal section of the Yeşilırmak Delta, a nationally important wetland, using remote sensing and Geographic Information Systems (GIS). Landsat-5 TM/Landsat-8 OLI satellite images from 1985 to 2022 (1985, 1990, 1996, 2001, 2006, 2011, 2017, and 2022) were used to determine shoreline changes. The shoreline determination process involved the combination of the normalized difference water index (NDWI) and the modified normalized difference water index (MNDWI). Annual rates of shoreline change were calculated using the linear regression rate (LRR) method within a 95% confidence level. Results showed a maximum erosion rate of -25.8 m/year in Zone-1, located in the western part of the Yeşilırmak River, and -7.7 m/year in Zone-2, situated in the eastern part. Erosion affected 61% of the delta, with 34% experiencing high-level erosion, 9% medium-level erosion, and 18% low-level erosion. Overlay analysis identified a total loss of 261.45 ha during 1985-2022, with 179.23 ha in Zone-1 and 82.22 ha in Zone-2. These findings enhance understanding of coastal dynamics by delineating erosion, accretion, and stable areas in the Yeşilırmak Delta. Furthermore, the study highlights the effectiveness of Landsat images and the LRR method in assessing shoreline changes. [ABSTRACT FROM AUTHOR]
- Published
- 2023
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