Elaboración de modelos 3D de diferentes morfologías y escalas utilizando técnicas Structure-from-Motion y fotografías terrestres

Gutiérrez, Álvaro Gómez; Schnabel, Susanne; Conoscenti, Christian; Carballo-Arias, Nathalie Almaru; Ferro, Vito; Stefano, Costanza Di; Blasco, J. J. Sanjosé; Matías, Javier De; Sempere, Fernando Berenguer

doi:10.17735/cyg.v30i1-2.39594

Cited by 4 publications

(3 citation statements)

References 20 publications

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“…Diversos estudios coinciden que es necesario aplicar estas técnicas bajo diferentes condiciones y en un amplio rango de formas del relieve, procesos, escalas y ambientes (Gómez Gutiérrez et al, 2016). Asimismo, los datos espaciales obtenidos con las fotografías aéreas adquiridas con dron, pueden ser validados usando puntos de control terrestre (Ramsey, Griffiths y Stokes, 2014).…”

Section: Implicaciones Teóricas Y Metodológicasunclassified

Anatomía De Un Cenote Con El Uso De Dron

Gijón-Yescas

Aguilar-Duarte

Martínez³

et al. 2021

Trop Subtrop Agroecosyst

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Background: Detailed geomorphological analysis of the karst depressions in Yucatán has received little attention because the measurement of morphometric parameters taken in the field involves a lot of work, time and costs. A pioneering exercise is presented that arose with two questions. What would be the characteristics of the relief that can be observed and / or measured in a cenote through images acquired with a drone? Would they be features similar to those seen with Google Earth images? Objective: To identify the units of the relief and morphometry of a cenote using images from two different platforms. Methodology: An open cenote located in the municipality of Chapab, Yucatán, was studied. A flight was carried out with a drone obtaining 259 images in 14 minutes, with which an orthomosaic, a digital elevation model and a point cloud were generated. We proceeded to the analysis of the data of the visible range (RGB), work with filters in ArcMap; the same spatial analysis procedure was performed with an image from Google Earth. Results: Nine units of the relief were identified in detail (permanent lake, intermittent lake, an area subject to flooding, beach, mouth, flooded slope, upper slope, scarp and lake coast); the differences between inputs are mainly in the morphometric parameters and in the values of the elevations. Implications: Drones facilitate imaging that allows detailed characterization of karst depressions to represent attributes that cannot be expressed on small scales. Conclusion: The anatomy of the Polol cenote technically corresponds to a sinkhole that houses a karst lake; nine relief units were identified that reveal limnological processes generating a karst-lacustrine environment that leads to the geomorphological enrichment of this region.

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Section: Implicaciones Teóricas Y Metodológicasunclassified

Anatomía De Un Cenote Con El Uso De Dron

Gijón-Yescas

Aguilar-Duarte

Martínez³

et al. 2021

Trop Subtrop Agroecosyst

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“…DEMs have been evolving in precision (29,30,31) as well as in their own generation method (32,33,34), in such a way that they allow for a great number of analysis with re-creatable, accessible, and trustworthy results (5,35).…”

Section: Construction Of the Digital Modelmentioning

confidence: 99%

Efectos de la concentración de sólidos en el fenómeno de sobre-elevación en canales artificiales curvos

Guerrero¹,

Villota²,

Gomez³

2018

inycomp

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En el presente estudio se analiza los efectos de la concentración de sólidos en el fenómeno de sobre-elevación en un canal con una curva de 180° y de sección transversal trapezoidal constante, con lecho fijo, el fluido tiene una distribución monodispersa no coloidal de partículas aproximadamente esféricas de tamaño 1 mm, por lo que la reología del flujo puede ser descrita por la ecuación de Einstein-Roscoe. Para el desarrollo de la investigación se plantean dos fases; laprimera, correspondiente a experimentación física, por medio de un canal artificial, en el que se realizaron 420 ensayos con diferentes concentraciones de sólidos y dos pendientes, para determinar el comportamiento del flujo bifásico. Todo esto se lleva a cabo comparando resultados experimentales y con resultados obtenidos de modelos numéricos. Los datos alcanzados en el proceso experimental se comparan con los resultados obtenidos a partir de modelos teóricos reportados en la literatura. A partir del análisis realizado Se formuló una ecuación de sobre-elevación, que puede ser usada para las condiciones de flujos bifásicos expuestas en este artículo. En la segunda fase se realizan modelaciones numéricas usando el software TITAN2F, donde se replican las condiciones del laboratorio. Los datos encontrados a partir de las modelaciones numéricas se compararon con los resultados experimentales, con el fin de validar el modelo numérico que utiliza TITAN2F. De lo anterior, se pudo deducir que efectivamente, TITAN2F reproduce el fenómeno hidráulico; sin embargo, se observa que el programa tiene baja susceptibilidad a cambios de concentración de sólidos debido a la escala utilizada.

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“…Figure 6.SfM technique for slopes that can be used for multiple applications in slope stability analysis[27][28][29][30][31][32][33][34][35].…”

mentioning

confidence: 99%

Application of the Q-Slope Empirical Approach for Slope Stability Assessment of Spanish Mountain Roads in Winter—Combining Remote Techniques with Virtual Reality

Bernal,

Jordá Bordehore

2023

Sustainability

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The Q-slope (2015) geomechanical classification is the only empirical methodology for slope stability analysis that considers the effect of ice. This article shows the results of its application for icy slopes in Spain. Despite its sunny image, Spain is a mountainous country with cold winters. Slopes alongside a mountain road and a ski resort carpark have been studied in Puerto de Navacerrada (Madrid region) and Benasque (Pyrenees). This work combines the manual collection of geomechanical data on slope characteristics with an empirical analysis of slope stability and remote data acquisition techniques (Structure from Motion, SfM). The results of the field data collection are shown in a metaverse with two approaches: a 360° image virtual tour and a 3D image repository. One of the novelties of this work is that researchers who wish to replicate these analyses can access a table of input parameters and make a virtual field trip to see the parameters included in this study. The results show that the Q-slope methodology is useful for stability analysis and is conservative in terms of recommendations: All the slopes that are seen as unstable appear as such, but some slopes that do not present problems are shown as “transitional” slopes. The data and observations taken are useful for increasing the methodology database and for completing existing graphs of stable vertical slopes with good quality, as well as slopes with little slope and low quality.

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Elaboración de modelos 3D de diferentes morfologías y escalas utilizando técnicas Structure-from-Motion y fotografías terrestres

Cited by 4 publications

References 20 publications

Anatomía De Un Cenote Con El Uso De Dron

Anatomía De Un Cenote Con El Uso De Dron

Efectos de la concentración de sólidos en el fenómeno de sobre-elevación en canales artificiales curvos

Application of the Q-Slope Empirical Approach for Slope Stability Assessment of Spanish Mountain Roads in Winter—Combining Remote Techniques with Virtual Reality

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