Combining multisource satellite data to estimate storage variation of a lake in the Rift Valley Basin, Ethiopia
Integration of remote sensing data sets from multiple satellites is tested to simulate water storage variation of Lake Ziway, Ethiopia for the period 2009-2018. Sixty Landsat ETM+/OLI images served to trace temporal variation of lake surface area using a water extraction index. Time series of lake l...
| Autores principales: | , , |
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| Formato: | Journal Article |
| Lenguaje: | Inglés |
| Publicado: |
Elsevier
2020
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| Materias: | |
| Acceso en línea: | https://hdl.handle.net/10568/108662 |
| _version_ | 1855543299598712832 |
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| author | Asfaw, W. Haile, Alemseged Tamiru Rientjes, T. |
| author_browse | Asfaw, W. Haile, Alemseged Tamiru Rientjes, T. |
| author_facet | Asfaw, W. Haile, Alemseged Tamiru Rientjes, T. |
| author_sort | Asfaw, W. |
| collection | Repository of Agricultural Research Outputs (CGSpace) |
| description | Integration of remote sensing data sets from multiple satellites is tested to simulate water storage variation of Lake Ziway, Ethiopia for the period 2009-2018. Sixty Landsat ETM+/OLI images served to trace temporal variation of lake surface area using a water extraction index. Time series of lake levels were acquired from two altimetry databases that were validated by in-situ lake level measurements. Coinciding pairs of optical satellite based lake surface area and radar altimetry based lake levels were related through regression and served for simulating lake storage variation. Indices for extracting lake surface area from images showed 91–99 % overall accuracy. Lake water levels from the altimetry products well agreed to in-situ lake level measurements with R2 = 0.92 and root mean square error of 11.9 cm. Based on this study we conclude that integrating satellite imagery and radar altimetry is a viable approach for frequent and accurate monitoring of lake water volume variation and for long-term change detection. Findings indicate water level reduction (4 cm/annum), surface area shrinkage (0.08km2/annum) and water storage loss (20.4Mm3/annum) of Lake Ziway (2009–2018). |
| format | Journal Article |
| id | CGSpace108662 |
| institution | CGIAR Consortium |
| language | Inglés |
| publishDate | 2020 |
| publishDateRange | 2020 |
| publishDateSort | 2020 |
| publisher | Elsevier |
| publisherStr | Elsevier |
| record_format | dspace |
| spelling | CGSpace1086622024-10-03T07:41:01Z Combining multisource satellite data to estimate storage variation of a lake in the Rift Valley Basin, Ethiopia Asfaw, W. Haile, Alemseged Tamiru Rientjes, T. water storage estimation lakes surface area satellite imagery landsat radar remote sensing water levels water extraction rivers Integration of remote sensing data sets from multiple satellites is tested to simulate water storage variation of Lake Ziway, Ethiopia for the period 2009-2018. Sixty Landsat ETM+/OLI images served to trace temporal variation of lake surface area using a water extraction index. Time series of lake levels were acquired from two altimetry databases that were validated by in-situ lake level measurements. Coinciding pairs of optical satellite based lake surface area and radar altimetry based lake levels were related through regression and served for simulating lake storage variation. Indices for extracting lake surface area from images showed 91–99 % overall accuracy. Lake water levels from the altimetry products well agreed to in-situ lake level measurements with R2 = 0.92 and root mean square error of 11.9 cm. Based on this study we conclude that integrating satellite imagery and radar altimetry is a viable approach for frequent and accurate monitoring of lake water volume variation and for long-term change detection. Findings indicate water level reduction (4 cm/annum), surface area shrinkage (0.08km2/annum) and water storage loss (20.4Mm3/annum) of Lake Ziway (2009–2018). 2020-07 2020-07-03T08:25:32Z 2020-07-03T08:25:32Z Journal Article https://hdl.handle.net/10568/108662 en Open Access Elsevier Asfaw, W.; Haile, Alemseged Tamiru; Rientjes, T. 2020. Combining multisource satellite data to estimate storage variation of a lake in the Rift Valley Basin, Ethiopia. International Journal of Applied Earth Observation and Geoinformation, 89:102095. |
| spellingShingle | water storage estimation lakes surface area satellite imagery landsat radar remote sensing water levels water extraction rivers Asfaw, W. Haile, Alemseged Tamiru Rientjes, T. Combining multisource satellite data to estimate storage variation of a lake in the Rift Valley Basin, Ethiopia |
| title | Combining multisource satellite data to estimate storage variation of a lake in the Rift Valley Basin, Ethiopia |
| title_full | Combining multisource satellite data to estimate storage variation of a lake in the Rift Valley Basin, Ethiopia |
| title_fullStr | Combining multisource satellite data to estimate storage variation of a lake in the Rift Valley Basin, Ethiopia |
| title_full_unstemmed | Combining multisource satellite data to estimate storage variation of a lake in the Rift Valley Basin, Ethiopia |
| title_short | Combining multisource satellite data to estimate storage variation of a lake in the Rift Valley Basin, Ethiopia |
| title_sort | combining multisource satellite data to estimate storage variation of a lake in the rift valley basin ethiopia |
| topic | water storage estimation lakes surface area satellite imagery landsat radar remote sensing water levels water extraction rivers |
| url | https://hdl.handle.net/10568/108662 |
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