Statistical downscaling of GRACE TWSA estimates to a 1-km spatial resolution for a local-scale surveillance of flooding potential

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dc.authorid0000-0003-3265-372X
dc.authorid0000-0002-4767-6660
dc.authorid0000-0002-3177-037X
dc.contributor.authorKhorrami, Behnam
dc.contributor.authorPirasteh, Saied
dc.contributor.authorAli, Shoaib
dc.contributor.authorSahin, Onur Gungor
dc.contributor.authorVaheddoost, Babak
dc.date.accessioned2026-02-12T21:05:29Z
dc.date.available2026-02-12T21:05:29Z
dc.date.issued2023
dc.departmentBursa Teknik Üniversitesi
dc.description.abstractThe Gravity Recovery and Climate Experiment (GRACE) paved the way for large-scale monitoring of the hydrological extremes. However, local scale analysis is aslo challenging due to the coarse resolution of the GRACE estimates. The feasibility of the downscaled GRACE data for the flood monitoring in the Kizilirmak Basin (KB) in Turkiye is investigated in this study by integrating the GRACE and hydrological model outputs of a random forest approach. Results suggest that the TWSA, over the Asagi Kizilirmak Basin (AKB), is ascending with an annual rate of + 3.51mm/yr; while the Orta Kizilirmak Basin (OKB), Yukari Kizilirmak Basin (YKB), Delice Basin (DB), Develi Kapali Basin (DKB), and Seyfe Kapali Basin (SKB) showed descending trend respectively as -1.15mm/yr, -1.58mm/yr, -1.14mm/yr, -2.34mm/yr, and -1.31mm/yr. The hydrological status of the basin showed that in 2003, 2005, 2010-2013, and 2015-2016 periods the study area was prone to the inundation. Hence, by validating the Flood Potential Index (FPI) rates acquired from the downscaled GRACE data, it was shown that the best correlation coefficient (0.73) between FPI and streamflow (Q) is associated with the SKB. It is also concluded that the downscaled TWSA associated with the fine-resolution models depicts acceptable accuracy in determination of the flood potential at local scales.
dc.identifier.doi10.1016/j.jhydrol.2023.129929
dc.identifier.issn0022-1694
dc.identifier.issn1879-2707
dc.identifier.scopus2-s2.0-85166018276
dc.identifier.scopusqualityQ1
dc.identifier.urihttps://doi.org/10.1016/j.jhydrol.2023.129929
dc.identifier.urihttps://hdl.handle.net/20.500.12885/6967
dc.identifier.volume624
dc.identifier.wosWOS:001051288600001
dc.identifier.wosqualityQ1
dc.indekslendigikaynakWeb of Science
dc.indekslendigikaynakScopus
dc.language.isoen
dc.publisherElsevier
dc.relation.ispartofJournal of Hydrology
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanı
dc.rightsinfo:eu-repo/semantics/closedAccess
dc.snmzKA_WoS_20260212
dc.subjectDownscaling
dc.subjectFlood potential
dc.subjectGRACE
dc.subjectRandom forest model
dc.subjectTWSA
dc.titleStatistical downscaling of GRACE TWSA estimates to a 1-km spatial resolution for a local-scale surveillance of flooding potential
dc.typeArticle

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