Use of UAV Data and HEC-RAS Model for Dimensioning of Hydraulic Structures on Forest Roads

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dc.authoridACIL, AHMET/0000-0001-7753-5802
dc.authoridEker, Remzi/0000-0002-9322-9634
dc.contributor.authorAcil, Ahmet
dc.contributor.authorAydin, Abdurrahim
dc.contributor.authorEker, Remzi
dc.contributor.authorDuyar, Ahmet
dc.date.accessioned2024-09-29T16:09:52Z
dc.date.available2024-09-29T16:09:52Z
dc.date.issued2023
dc.departmentKarabük Üniversitesien_US
dc.description.abstractIn terms of engineering standards, the dimensions of hydraulic structures such as culverts on forest roads should have the capability to drain the expected maximum discharge for a 50-year return period during their lifespan (i.e., 20 years). In Turkiye, Talbot's formula, as empirical method, has commonly been used in determining the required cross-sectional area (CSA) of the structures. However, in practice, forest road engineers in Turkiye do not pay enough attention to their construction with required dimensions calculated by Talbot's formula. In the present study, the Hydrological Engineering Centre - River Analysis System (HEC-RAS) model was used to evaluate the dimensions of installed structures in terms of their ability to drain maximum discharges, with the aim of determining the required dimensions for those that could not meet this requirement. To this purpose, the 6+000 km forest road No. 410 in Acisu Forest Enterprise, Gerede Forest Directorate (Bolu, Turkiye) was selected as the study area. In total, 15 small watersheds crossed by the forest road were delineated, with only six of them having cross-drainage structures. The HEC-RAS model geometry was generated by manual unmanned aerial vehicle (UAV) flights at altitudes of 5-15 m, providing very high spatial resolution (<1 cm). The maximum discharges of the watersheds were estimated for the HEC-RAS model using the Rational, Kursteiner, and Soil Conservation Service-Curve Number (SCS-CN) methods. Maximum discharges of 0.18-6.03 were found for the Rational method, 0.45-4.46 for the Kursteiner method, and 0.25-7.97 for the SCS-CN method. According to the HEC-RAS hydraulic model CSA simulations, most of the installed culvert CSAs calculated by Talbot's formula were found to be incapable of draining maximum discharges. The study concluded that the HEC-RAS model can provide accurate and reliable results for determining the dimensions of such structures for forest roads.en_US
dc.identifier.doi10.5552/crojfe.2023.1701
dc.identifier.issn1845-5719
dc.identifier.issue1en_US
dc.identifier.scopus2-s2.0-85146317725en_US
dc.identifier.scopusqualityQ1en_US
dc.identifier.urihttps://doi.org/10.5552/crojfe.2023.1701
dc.identifier.urihttps://hdl.handle.net/20.500.14619/7822
dc.identifier.volume44en_US
dc.identifier.wosWOS:001033440200001en_US
dc.identifier.wosqualityQ1en_US
dc.indekslendigikaynakWeb of Scienceen_US
dc.indekslendigikaynakScopusen_US
dc.language.isoenen_US
dc.publisherZagreb Univ, Fac Forestryen_US
dc.relation.ispartofCroatian Journal of Forest Engineeringen_US
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanıen_US
dc.rightsinfo:eu-repo/semantics/openAccessen_US
dc.subjectforest roadsen_US
dc.subjectHEC-RASen_US
dc.subjectHydraulic structuresen_US
dc.subjectSCS-CNen_US
dc.subjectUAVen_US
dc.titleUse of UAV Data and HEC-RAS Model for Dimensioning of Hydraulic Structures on Forest Roadsen_US
dc.typeArticleen_US

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