Evaluation of Simulation Results of HEC-RAS Coupled 1D/2D and 2D Modeling Approaches Through Scenario-Based Analysis

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dc.authoridhttps://orcid.org/0000-0002-2052-5440
dc.authoridhttps://orcid.org/0000-0003-2104-9746
dc.contributor.authorSpor, Pınar
dc.contributor.authorPaşa, Yasin
dc.contributor.authorDoğan, Emrah
dc.date.accessioned2025-08-15T10:24:03Z
dc.date.available2025-08-15T10:24:03Z
dc.date.issued2025
dc.departmentMühendislik ve Mimarlık Fakültesi
dc.description.abstractWhile 1D, 2D, and coupled 1D/2D models are widely used in flood extent mapping, a significant research gap remains in comparative analyses of 2D and coupled 1D/2D approaches. Study of the Dinsiz Stream Basin is of critical importance due to its proximity to industrial zones and residential areas, as well as its susceptibility to flood risk. Due to the lack and insufficiency of flow data in the basin, only long-term rainfall data were used in the analysis. Rainfall return periods of 50, 100, 200, and 500 years were estimated using statistical methods, and these values were utilized to generate flood hydrographs for this study. These values were then transferred to HEC-HMS, and the resulting hydrographs were input into HEC-RAS to establish coupled 1D/2D and 2D models for comparison. Flood mapping was performed for different return periods to evaluate the flood impact. This study revealed that maximum water levels in the 1D/2D models were higher than in the 2D models. The results showed that Dinsiz Stream could cause major losses for the second organized industrial zone located nearby when it overflows. The accuracy of the model was ensured with photographs of the flood event that occurred in 2021, ensuring the reliability of the findings.
dc.identifier.citationSpor, P.; Pa¸sa, Y.; Do˘gan, E. Evaluation of Simulation Results of HEC-RAS Coupled 1D/2D and 2D Modeling Approaches Through Scenario-Based Analysis. Water 2025, 17, 1163. https://doi.org/10.3390/ w17081163
dc.identifier.doi10.3390/w17081163
dc.identifier.issn2073-4441
dc.identifier.issue8
dc.identifier.urihttps://hdl.handle.net/11363/10275
dc.identifier.volume17
dc.identifier.wos001477307500001
dc.identifier.wosqualityQ3
dc.indekslendigikaynakWeb of Science
dc.institutionauthorPaşa, Yasin
dc.institutionauthoridhttps://orcid.org/0000-0003-2104-9746
dc.language.isoen
dc.publisherMDPI, MDPI AG, Grosspeteranlage 5, CH-4052 BASEL, SWITZERLAND
dc.relation.ispartofWATER
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanı
dc.rightsinfo:eu-repo/semantics/openAccess
dc.subjectHEC-RAS 2D models
dc.subjectHEC-RAS 1D/2D coupled models
dc.subjectflood inundation map
dc.subjectHEC-HMS
dc.subjectrainfall runoff
dc.titleEvaluation of Simulation Results of HEC-RAS Coupled 1D/2D and 2D Modeling Approaches Through Scenario-Based Analysis
dc.typeArticle

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