Trend-surfaces analysis of morphometric parameters: A case-study in southearstern Brazil

Abstract Extreme rainfalls are of paramount importance for the formation of river springs and, consequently, the occurrence of spills and floods. The article presents the results of a case study of the potentially dangerous 24-hour eruptions in the Provadiyska valley system from the end of the 20th and the beginning of the 21st century. Particular attention is paid to the morphometric parameters and the configuration of the river-valley supply network of the Provadiyska river. On this basis, there are defined areas in which there are favorable conditions for forming high river waves.

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Landform classification via fuzzy classification of morphometric parameters computed from digital elevation models: case study on Zagros Mountains

Arabian Journal of Geosciences ◽

10.1007/s12517-014-1556-y ◽

2014 ◽

Vol 8 (7) ◽

pp. 4921-4937 ◽

Cited By ~ 3

Author(s):

Marzieh Mokarram ◽

Abdollah Seif ◽

Dinesh Sathyamoorthy

Keyword(s):

Digital Elevation Models ◽

Morphometric Parameters ◽

Fuzzy Classification ◽

Zagros Mountains ◽

Landform Classification ◽

Digital Elevation

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Lava flow growth inferred from morphometric parameters: a case study of Citlaltépetl volcano, Mexico

Geological Magazine ◽

10.1017/s0016756897006614 ◽

1997 ◽

Vol 134 (2) ◽

pp. 151-162 ◽

Cited By ~ 12

Author(s):

GERARDO CARRASCO-NÚÑEZ

Keyword(s):

Lava Flow ◽

Morphometric Parameters ◽

Effusion Rate ◽

Cooling Method ◽

Multiple Flows ◽

Lava Type ◽

Effusion Rates ◽

The Relationship ◽

Eruption Duration

Recent (Quaternary) lava fields, such as those of Citlaltépetl (Pico de Orizaba) volcano in Mexico, are excellent places to obtain precise measurements of flow-field dimensions that can be used to estimate volume, eruption duration and effusion rates. The relationship between these parameters and the influence of some other interrelated features such as lava composition, superficial structures and lava type are important tools that can help to infer conditions when the lavas were active and thus improve understanding of how flow fields grow. The Holocene lavas of Citlaltépetl volcano are homogeneous in composition (dacites) and are generally blocky with well-developed levees. The eruption duration obtained for the Citlaltépetl lavas by a method proposed by C. Kilburn and R. Lopes presents a good correlation with the different lava types morphologically classified here. Results from that method compare favourably with the inferred effusion rates estimated by an empirical cooling method (Graetz). The lavas show different behaviour, mainly controlled by fluctuations in the effusion rate that promote changes from single- to multiple-flow style. The maximum distance achieved by a flow is directly proportional to the effusion rate in Citlaltépetl lavas, but it is always lower for multiple flows, independent of the volume of erupted lava. Observations of Citlaltépetl lavas can be used to understand how lava flow growth occurs on other volcanoes.

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Assessment of the Potentiality to the Debris-Flow Occurrence from Physiographic and Morphometrics Parameters: a Case Study in Santo Antônio Basin (Caraguatatuba, São Paulo State, Brazil)

Anuário do Instituto de Geociências - UFRJ ◽

10.11137/1982-3908_2021_44_43313 ◽

2021 ◽

Vol 44 ◽

Author(s):

Claudia Vanessa Santos Corrêa ◽

Fábio Augusto Gomes Vieira Reis ◽

Lucilia Do Carmo Giordano ◽

Victor Carvalho Cabral ◽

Marcelo Fischer Gramani ◽

...

Keyword(s):

Debris Flow ◽

Sao Paulo ◽

Morphometric Parameters ◽

Joint Analysis ◽

North Coast ◽

São Paulo ◽

Serra Do Mar ◽

Hydrographic Basin ◽

Valley Slope

This work aims to evaluate the potential for the debris-flow triggering from Santo Antônio hydrographic basin, located in the Serra do Mar region on North Coast of the State of São Paulo, Brazil, based on physiographic attributes, rainfall data, and morphometric parameters. For this purpose, hydrographic basin techniques were applied, assessing the vulnerability to the debris flow from geomorphological, geological, climatic, and anthropic aspects, and morphometric parameters relevant to the triggering of these processes in watersheds were calculated. Seven physiographic units were identified, which supported the understanding of geological and geomorphological aspects of the basin: coastal plains; river plains; colluvium and talus ramps; escarpments of Serra do Mar; upland of Paraitinga; mountainous relief and hillocks domain. The sub-basins located in steep sections of the relief, with high slopes, valleys, and channels docked, high drainage densities present higher values in the morphometric parameters, indicating a greater potential for triggering and occurrence of debris-flow processes. The joint analysis of physiographic compartmentalization with the identification of relief features, slope, amplitude, valley, slope shapes and morphometric parameters, is extremely relevant to recognize hydrographic basins susceptible to debris flows, as it integrates, and correlates aspects of the physical environment considered to trigger in the occurrence of these processes.

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The methods morphometric analysis’ of basinal systems’ within mountain territories using GIS (case study of the Chornogora’s part of Prut’s basin)

Visnyk of the Lviv University. Series Geography ◽

10.30970/vgg.2012.40.2085 ◽

2012 ◽

Vol 2 (40) ◽

pp. 68-90

Author(s):

A. Marchak

Keyword(s):

Key Words ◽

Data Base ◽

Digital Elevation Model ◽

Morphometric Analysis ◽

Software Package ◽

Morphometric Parameters ◽

Geoinformation Systems ◽

Digital Elevation ◽

Elevation Model

In the article is given the methods of fulfillment consecutive stages of the relief morphometric analysis of basinal systems' within mountain territories using software package ESRI ArcGIS Desktop 9.3 (case study of the Chornogora's part of Prut's basin). The results of fulfillment this algorithm is developed digital elevation model, range of analytical and synthetic morphometric maps and hypsographical profiles, circular charts, bar diagrams, plots and tables of relief's various morphometric parameters as well as apportionment for their further complex morphogenetical analysis. Key words: morphometric analysis of the relief, geoinformation systems, geoinformation data base, digital elevation models, morphometric parameters of the relief, analytical and synthetic morphometric maps.

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