Combining multisource satellite data to estimate storage variation of a lake in the Rift Valley Basin, Ethiopia

Vista sencilla de ítem
dc.creatorAsfaw, W.
dc.creatorHaile, Alemseged Tamiru
dc.creatorRientjes, T.
dc.date2020-07
dc.date2020-07-03T08:25:32Z
dc.date2020-07-03T08:25:32Z
dc.date.accessioned2026-06-27T18:44:31Z
dc.descriptionIntegration 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).
dc.identifierhttps://hdl.handle.net/10568/108662
dc.identifier.urihttp://hdl.handle.net/123456789/164221
dc.languageen
dc.publisherElsevier
dc.rightsOpen Access
dc.sourceAsfaw, 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.
dc.subjectwater storage
dc.subjectestimation
dc.subjectlakes
dc.subjectsurface area
dc.subjectsatellite
dc.subjectimagery
dc.subjectlandsat
dc.subjectradar
dc.subjectremote sensing
dc.subjectwater levels
dc.subjectwater extraction
dc.subjectrivers
dc.titleCombining multisource satellite data to estimate storage variation of a lake in the Rift Valley Basin, Ethiopia
dc.typeJournal Article

Archivos

Colecciones

Instituto Internacional para el Manejo del Agua (IWMI)