Multitemporal observation of Karla reservoir in Thessaly Greece utilizing SAR and optical remotely sensing imagery
Wetlands constitute areas with significant value and service offerings both in anthropogenic and natural environments. Taking into consideration the importance of studying wetland ecosystems and their changes, the aim of this paper is the observation of Lake Karla’s reservoir fluctuation, since its...
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| Language: | English |
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European Association of Geographers
2020-12-01
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| Series: | European Journal of Geography |
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| Online Access: | https://eurogeojournal.eu/index.php/egj/article/view/166 |
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| author | Triantafyllos FALARAS Maria KOILAKOU Leonidas TSOUKALAS |
| author_facet | Triantafyllos FALARAS Maria KOILAKOU Leonidas TSOUKALAS |
| author_sort | Triantafyllos FALARAS |
| collection | DOAJ |
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Wetlands constitute areas with significant value and service offerings both in anthropogenic and natural environments. Taking into consideration the importance of studying wetland ecosystems and their changes, the aim of this paper is the observation of Lake Karla’s reservoir fluctuation, since its reconstitution in 2010. For this reason, annual and seasonal fluctuations of the reservoir were estimated, utilizing remote sensing Synthetic Aperture Radar (SAR) (Sentinel 1) and optical (Sentinel 2) imagery, as well as Landsat 5 imagery. For SAR imagery an image segmentation method with a dynamic threshold operator based on mean values is utilized, while for optical imagery the Normalized Difference Water Index (NDWI) is applied. The findings reveal changes in Karla’s reservoir, with its acreage being continually increased on average on an annual basis. Meanwhile, on a seasonal basis, the results indicate some variations in the reservoir, due to precipitation and irrigation purposes.
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| format | Article |
| id | doaj-art-a70d31738f2c4c4f803f2193b27ec6c8 |
| institution | Kabale University |
| issn | 1792-1341 2410-7433 |
| language | English |
| publishDate | 2020-12-01 |
| publisher | European Association of Geographers |
| record_format | Article |
| series | European Journal of Geography |
| spelling | doaj-art-a70d31738f2c4c4f803f2193b27ec6c82025-01-06T06:59:22ZengEuropean Association of GeographersEuropean Journal of Geography1792-13412410-74332020-12-0111410.48088/ejg.t.fal.11.4.144.156Multitemporal observation of Karla reservoir in Thessaly Greece utilizing SAR and optical remotely sensing imageryTriantafyllos FALARASMaria KOILAKOULeonidas TSOUKALAS Wetlands constitute areas with significant value and service offerings both in anthropogenic and natural environments. Taking into consideration the importance of studying wetland ecosystems and their changes, the aim of this paper is the observation of Lake Karla’s reservoir fluctuation, since its reconstitution in 2010. For this reason, annual and seasonal fluctuations of the reservoir were estimated, utilizing remote sensing Synthetic Aperture Radar (SAR) (Sentinel 1) and optical (Sentinel 2) imagery, as well as Landsat 5 imagery. For SAR imagery an image segmentation method with a dynamic threshold operator based on mean values is utilized, while for optical imagery the Normalized Difference Water Index (NDWI) is applied. The findings reveal changes in Karla’s reservoir, with its acreage being continually increased on average on an annual basis. Meanwhile, on a seasonal basis, the results indicate some variations in the reservoir, due to precipitation and irrigation purposes. https://eurogeojournal.eu/index.php/egj/article/view/166Remote Sensing, Inland water Mapping, Optical Imagery, SAR Imagery, Lake Karla, ICHGS-2019 |
| spellingShingle | Triantafyllos FALARAS Maria KOILAKOU Leonidas TSOUKALAS Multitemporal observation of Karla reservoir in Thessaly Greece utilizing SAR and optical remotely sensing imagery European Journal of Geography Remote Sensing, Inland water Mapping, Optical Imagery, SAR Imagery, Lake Karla, ICHGS-2019 |
| title | Multitemporal observation of Karla reservoir in Thessaly Greece utilizing SAR and optical remotely sensing imagery |
| title_full | Multitemporal observation of Karla reservoir in Thessaly Greece utilizing SAR and optical remotely sensing imagery |
| title_fullStr | Multitemporal observation of Karla reservoir in Thessaly Greece utilizing SAR and optical remotely sensing imagery |
| title_full_unstemmed | Multitemporal observation of Karla reservoir in Thessaly Greece utilizing SAR and optical remotely sensing imagery |
| title_short | Multitemporal observation of Karla reservoir in Thessaly Greece utilizing SAR and optical remotely sensing imagery |
| title_sort | multitemporal observation of karla reservoir in thessaly greece utilizing sar and optical remotely sensing imagery |
| topic | Remote Sensing, Inland water Mapping, Optical Imagery, SAR Imagery, Lake Karla, ICHGS-2019 |
| url | https://eurogeojournal.eu/index.php/egj/article/view/166 |
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