Compartimentação Geomorfológica Do Maciço De Martins-Portalegre - Ne Do Brasil

Oliveira, George Pereira de; Tavares, Bruno de Azevêdo Cavalcanti; Corrêa, Antônio Carlos de Barros

doi:10.28998/contegeo.v3i6.6805

Cited by 3 publications

(3 citation statements)

References 4 publications

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“…Una cuenca hidrográfica posee múltiples funcionamientos, los cuales dependen de las condiciones climáticas y de las características físicas propias de la cuenca. La interacción entre estas variables condicionantes resulta en una serie de procesos naturales que permiten comprender la dinámica de la cuenca, particularmente a partir del estudio y caracterización de sus parámetros morfométricos (e.g., Cordeiro et al, 2019;Oliveira et al, 2019;Godínez-Tamay et al, 2020). Dicho análisis es de gran importancia para comprender e interpretar el comportamiento morfodinámico de la cuenca, así como su respuesta hidrológica frente a diferentes escenarios de precipitaciones (e.g., Méndez y Marcucci, 2006;Gaspari y Delgado, 2010;da Silva Alves et al, 2021).…”

Section: Introductionunclassified

Morfometría de una cuenca de los Andes Centrales, San Juan, Argentina: evaluación de los factores condicionantes del terreno a la ocurrencia de aluviones

Rios,

Ginesta Torcivia,

Onorato

et al. 2024

andgeo

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The present work aims to determine flash flood occurrence prone areas, in the Jáchal river basin, San Juan Province, Argentina. The Jáchal river basin covers ~29,000 km2 and has a perimeter of ~2,400 km, while the eponymous river extends for nearly 570 km. It is a 7th order basin according to Strahler’s classification, subdivided into four 6th order sub-basins. Various morphometric basin characteristics are analysed and some basic and derived parameters are calculated. These calculations allow predicting the basin behaviour due to heavy rainfall, which translates into large volumes of water with peak flows capable of generating significant flash floods. The basin has a torrential character, so in case of intense rainfall the terrain conditions would contribute to increasing the flow of the main rivers. An inventory of alluvial deposits was carried out and their relationship with the conditioning variables of the terrain was evaluated. At the confluence zones, the river tributaries show more intense overflows than the main collector. This promotes the generation of flash floods. The areas most likely to be affected by flash flood events correspond to low-humidity, east-facing slightly rough terrains, with slopes of up to 15° as well as low-lying flood plain sectors, and at the confluence of tributaries with the main rivers. Populated centres and provincial and national routes are prone to be affected by alluvial events in the study area.

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Section: Introductionunclassified

Morfometría de una cuenca de los Andes Centrales, San Juan, Argentina: evaluación de los factores condicionantes del terreno a la ocurrencia de aluviones

Rios,

Ginesta Torcivia,

Onorato

et al. 2024

andgeo

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“…The rest, still according to the authors, would be controlled by the thermal uplift process in response to the erosion of the continental lithosphere base, caused by convection at the boundary between the continental and oceanic crust. However, there is evidence for Cenozoic tectonic processes, in addition to the reported passive structural controls, exerting control on the conformation of the regional topography (e.g., TAVARES et al 2014;OLIVEIRA et al 2018;GURGEL et al 2013) Given these challenges, modern techniques of topography analysis, through remote sensing products, have become one of the most fruitful means of investigating structural and tectonic controls on the relief (ANDRADES FILHO; ROSSETTI, 2012). One of the applications of these data is the spatialization of eroded topography and the investigation of the tracing of river courses, one of the main modeling agents of the earth's surface.…”

Section: Introductionmentioning

confidence: 99%

Eroded topography in Proterozoic Basement: the case of Capiá river watershed, Semi‐arid Northeastern Brazil

Panta

Nascimento

Monteiro

2022

Rev. Bras. Geomorfol.

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: It is a consensus that the semi-arid depressions created in Atlantic Proterozoic Shield underwent intense denudational processes, especially during the Cenozoic. However, there are still no studies on quantifying and spatializing the fluvial incision for the Southern Sertaneja Depression, low course of the São Francisco river. Then, this study sought to quantify and spatialize the fluvial incision over the Proterozoic basement in the Capiá river basin through the integration of geoprocessing and geostatistical techniques (ordinary kriging), based on a Digital Elevation Model. Correlations were drawn between lithological resistance, basement structures and geomorphological aspects. More than half of the analyzed watershed mass has already been removed by denudational processes and the minimum bulk erosion per corresponding area is in contrast with other regions of the planet. The reconstitution of the topography allowed the delimitation of two large morphostructural compartments in the basin. Finally, apatite fission track data from studies already published in the study area were presented.

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“…Las características físicas del paisaje que facilitan la determinación del comportamiento, escala, complejidad y variabilidad de estructuras geológicas, por medio de índices numéricos que pueden correlacionarse con parámetros físicos. De esta forma, el arquetipo del análisis morfométrico en geomorfología es la morfometría de los sistemas fluviales (Godínez-Tamay et al, 2020;Oliveira, et al, 2019).…”

Section: Introductionunclassified

Caracterización morfométrica de la cuenca del Salado Bajo, Región de Atacama, Chile

et al. 2021

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El análisis en conjunto de parámetros morfométricos puede ser usado en la evaluación de la susceptibilidad del terreno, y se presenta como una técnica de levantamiento topográfico simple y de bajo costo para la zonificación ambiental y la gestión de desastres. Este estudio presenta el análisis de un conjunto de índices morfométricos aplicados a la cuenca hidrográfica del Salado Bajo-Región de Atacama (Chile), con el objetivo de determinar las características geomorfológicas que condicionan el escenario previo al evento meteorológico gatillante de los flujos de detritos en cuencas de zonas áridas. La metodología se basó en la caracterización física por medio del análisis de: parámetros morfométricos, análisis hipsométrico, jerarquización de los canales y densidad de drenaje. Los principales resultados obtenidos demostraron que la forma alargada de la cuenca es un factor condicionante a la ocurrencia de flujos de detritos. Además, los resultados de pendiente media de la cuenca y la velocidad media de flujo indican que el terreno de la cuenca es fuertemente accidentado y que la velocidad de escorrentía y el poder de arrastre del material erosionada son altos.

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Compartimentação Geomorfológica Do Maciço De Martins-Portalegre - Ne Do Brasil

Cited by 3 publications

References 4 publications

Morfometría de una cuenca de los Andes Centrales, San Juan, Argentina: evaluación de los factores condicionantes del terreno a la ocurrencia de aluviones

Morfometría de una cuenca de los Andes Centrales, San Juan, Argentina: evaluación de los factores condicionantes del terreno a la ocurrencia de aluviones

Eroded topography in Proterozoic Basement: the case of Capiá river watershed, Semi‐arid Northeastern Brazil

Caracterización morfométrica de la cuenca del Salado Bajo, Región de Atacama, Chile

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