Modelling topo-bathymetric surface using a triangulation irregular network (TIN) of Tunga Dam in Nigeria

Ibrahim, Pius Onoja; Sternberg, Harald; Samaila-Ija, Hassan A.; Adgidzi, Donald; Nwadialor, I. J.

doi:10.1007/s12518-022-00438-y

Cited by 9 publications

(3 citation statements)

References 32 publications

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“…The TIN method is a widely used technique for representing irregularly spaced data points and generating continuous surface models. It effectively captures the complex geometry of waterway surfaces by connecting surveyed points with non-overlapping triangles [14] . Then, the volume of the sedimentation was obtained, based on the comparison between the previous two surfaces (Riverbed and Navigation path) using Tin-Volume Surface Technique.…”

Section: A) Tin-surface Creationmentioning

confidence: 99%

Enhancing navigation safety through the Nile River to avoid bottlenecks using a quasi-real-time approach and Google Maps

Salem,

Bakhiet,

Khedr

2024

JES. Journal of Engineering Sciences

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The significant importance of the Nile River emerges not only from the fact that it represents the main water source for Egypt but also from its being an important water path for sailing to transport goods or for Nile tourism cruises. Because of climate change and the construction of the Ethiopian Renaissance Dam, Egypt may have to reduce the discharges from the High Aswan Dam (HAD), which may cause a reduction in water depth below a safe level for navigation. Consequently, this study aims to present a quasi-real-time approach to detect the locations of bottlenecks that threat navigation path via mobile Google Maps. Accordingly, the topographic, hydraulic data, the alignment and geometry of the navigational channel, were collected from the Ministry of Water Resources and Irrigation of Egypt. AutoCAD Civil 3d is adopted in this study to determine navigational bottleneck locations of the Nile River's first reach. Two surface models were created: The Riverbed surface and the navigational path surface using a Triangular Irregular Network (TIN). As a result of the created TIN-Surface modelling via the current study; the amount of sediment, that should be dredged, was estimated (at about 2.1 million.m 3 ). In addition, the navigation path bottlenecks map for the studied reach was created based on minimum water levels at Aswan High Dam's winter closure and the navigational path's geometry. In conclusion, this study provides a simple solution for avoiding bottlenecks by presenting a userfriendly web Google Maps of these locations to represent the Nile River's current navigation condition in quasi-real-time and support the decisionmaker on river navigation conditions.

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Section: A) Tin-surface Creationmentioning

confidence: 99%

Enhancing navigation safety through the Nile River to avoid bottlenecks using a quasi-real-time approach and Google Maps

Salem,

Bakhiet,

Khedr

2024

JES. Journal of Engineering Sciences

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“…Kumpulan titik data (X, Y, Z) dilakukan interpolasi untuk membuat DEM. Interpolasi yang digunakan dalam penelitian ini adalah Triangulation Irregular Network (TIN) (Ibrahim et al, 2022), Ordinary Kriging (Thanh et al, 2020), dan Inverse Distance Weighting (IDW) (Marques et al, 2021).…”

Section: Pengukuran Perubahan Kapasitas Embungunclassified

EVALUASI FUNGSI LINGKUNGAN EMBUNG BERBASIS SISTEM INFORMASI GEOGRAFI: KASUS EMBUNG KRAPYAK DAN TONOGORO DI KULON PROGO, DAERAH ISTIMEWA YOGYAKARTA (Environment Role Evaluation of Retention Basins Using Geographic Information Systems: Case of Krapyak and Tonogoro in Kulon Progo, Special Region of Yogyakarta)

Yuliarti,

Ngadisih,

Hadi

et al. 2023

JPPDAS

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Environmentally, retention basins are used for soil and water conservation but some of them experience drought. The location of the retention basin is fundamental in fulfilling environmental functions. This study aimed to apply GIS for evaluating the environmental functions of retention basins in a certain area. Tonogoro and Krapyak retention basins lay on Kulon Progo Regency, Yogyakarta are the cases of this study. The Krapyak is located at the outlet of catchment area, while the Tonogoro is built on the hilltop. Environmental functions were assessed based on the potential drought and dynamics of carrying capacity due to sedimentation. The materials used were detailed design documents, Google Earth images, DEMNAS images, 1:25,000 scale Indonesian landform maps, rainfall data, and soil type maps. The initial reservoir capacity was calculated based on depth using DEMNAS data. The recent reservoir capacity was measured using a sounding method with a Garmin 520s Echo sounder, Depth Sounder, and Roll meter. All data was integrated in GIS to be presented visually in the form of a reservoir depth profile that reflects the dynamics of the reservoir capacity. The potential of surface runoff volume was calculated using SCS-CN method. This study found that the Tonogoro retention basin experienced a water shortage because the potential volume of runoff water was only able to supply 5% of the reservoir’s capacity. The accumulated sediment yield in the Krapyak retention basins was 3,498 m3 or 12.2% of the total capacity of a sedimentation rate of 699.6 m3 per year.

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“…The similar values are interconnected, generating contour lines, i.e., lines that connect points with the same "altitude". This technique is widely used in topographic studies for the definition of contour lines [43].…”

Section: Model Façade and Standard Mapsmentioning

confidence: 99%

Mapping the Risk of Occurrence of Defects in Façades with Ceramic Claddings

et al. 2023

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When a building façade does not meet its performance requirements, the integrity and safety of the structure may be compromised, resulting in the reduction of the building’s service life. Ceramic tiles are a commonly applied cladding solution due to their aesthetic value and durability. However, as soon as ceramic claddings are installed, the claddings are subjected to various degradation agents, thus starting a degradation process in which different anomalies occur sequentially and simultaneously over the years. This study intends to find patterns of incidence of anomalies in distinct areas of the façade and to map the risk of occurrence of a given anomaly. For that purpose, 345 ceramic claddings are analysed (46 buildings, corresponding to 81,500 m2) in the region of Brasília, Brazil. Four main defects are identified based on visual inspections and using auxiliary diagnosis techniques, namely (i) detachment of ceramic tiles; (ii) cracking; (iii) grout failure; (iv) efflorescence. The results reveal that the detachment is the most frequent defect. The sensitivity maps proposed allow identifying a certain pattern in the occurrence of defects on ceramic claddings, revealing that continuous walls, transition between floors, and the top of the building are areas critically vulnerable to defects. The results obtained allow mapping the sensitivity of each part of the ceramic claddings to a given defect, aiding the detection and diagnosis of the degradation condition when carrying out inspections on new façades.

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Modelling topo-bathymetric surface using a triangulation irregular network (TIN) of Tunga Dam in Nigeria

Cited by 9 publications

References 32 publications

Enhancing navigation safety through the Nile River to avoid bottlenecks using a quasi-real-time approach and Google Maps

Enhancing navigation safety through the Nile River to avoid bottlenecks using a quasi-real-time approach and Google Maps

Mapping the Risk of Occurrence of Defects in Façades with Ceramic Claddings

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