Use of UAV Data and HEC-RAS Model for Dimensioning of Hydraulic Structures on Forest Roads
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Dosyalar
Tarih
2023
Yazarlar
Dergi Başlığı
Dergi ISSN
Cilt Başlığı
Yayıncı
University of Zagreb, Faculty of Mining, Geology and Petroleum Engineering
Erişim Hakkı
info:eu-repo/semantics/openAccess
Özet
In 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 Türkiye, 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 Türkiye do not pay enough at-tention 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 Acısu Forest Enterprise, Gerede Forest Directorate (Bolu, Türkiye) 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, Kürsteiner, 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 Kürsteiner 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. © 2022 by the authors.
Açıklama
Anahtar Kelimeler
forest roads, HEC-RAS, Hydraulic structures, SCS-CN, UAV, Culverts, Forestry, Hydraulic models, Roads and streets, Soil conservation, Unmanned aerial vehicles (UAV), Watersheds, Aerial vehicle, Analysis system, Cross sectional area, Engineering standards, Forest roads, Hydrological Engineering Center, Hydrological engineering center – river analyse system, Soil conservation service - curve numbers, System models, Unmanned aerial vehicle, Antennas, hydraulic structure, return period, road, simulator, spatial resolution, unmanned vehicle, Area, Dimensions, Drainage, Engineering, Forestry, Hydraulic Structures, Roads
Kaynak
Croatian Journal of Forest Engineering
WoS Q Değeri
Q1
Scopus Q Değeri
Q1
Cilt
44
Sayı
1
