scholarly journals Morphometric analysis of the drainage network in the Vitosha Mountain (preliminary results)

2021 ◽  
Vol 82 (3) ◽  
pp. 210-212
Author(s):  
Petko Bozhkov
Keyword(s):  
Morphometric Analysis ◽  
Drainage Density ◽  
Morphometric Parameters ◽  
Topographic Maps ◽  
Drainage Network ◽  
Stream Length ◽  
Digital Elevation ◽  
Elevation Model ◽  
Channel Segment

The aim of the following case study is to analyze quantitatively the drainage network in the Vitosha Mountain, SW Bulgaria. Drainage network is outlined from topographic maps and extracted from digital elevation model (DEM). Several morphometric parameters are calculated – drainage density, channel-segment frequency, total stream length, etc. Hierarchy of tributaries and main rivers is also discussed.

scholarly journals Análise de Risco de Degradação na Bacia Hidrográfica do Riacho do Pontal - PE (Risk Analysis of Degradation in Basin River Pontal – PE)

2012 ◽  
Vol 5 (3) ◽  
pp. 646
Author(s):  
Madson Tavares Silva ◽  
Vicente De P. R. da Silva ◽  
Edicarlos P. de Sousa ◽  
Sonaly D. de Oliveira
Keyword(s):  
Risk Analysis ◽  
Drainage Density ◽  
Morphometric Parameters ◽  
Automatic Process ◽  
Drainage Network ◽  
Low Density ◽  
Gis And Remote Sensing ◽  
Digital Elevation ◽  
Elevation Model ◽  
Low Density Area

Este trabalho teve como objetivo analisar o risco de degradação presente na bacia hidrográfica do Riacho do Pontal-PE, a partir de técnicas de geoprocessamento e sensoriamento remoto da superfície. Parâmetros morfométricos da bacia de drenagem foram obtidos pelo MDE (Modelo Digital de Elevação) utilizando um processo automático através de técnicas de geoprocessamento utilizando o software ARCGIS 9.3. Os resultados demonstraram que a bacia do Riacho do Pontal possui uma área total de 6057,0 km² e perímetro de 464,0 km, a rede de drenagem é de 5ª ordem sendo moderadamente ramificada apresentando um comprimento total de 2060,0 km com um curso principal de 147,6 km, a bacia apresentou uma forma mais alongada, com densidade de drenagem inferior a 0,4 km/km2 assim como baixa densidade hidrográfica, a classe de declividade predominante é do tipo várzea e plano a suave ondulado representado cerca de 90% da área total da bacia. As classes de cobertura de solos predominantes (caatinga densa, caatinga densa degradada e cultivos diversificados) ocupam 5480 km2, área correspondente a 90,4%. As maiores áreas produtoras de sedimento encontram-se próximas a rede de drenagem.Palavras - chave: Rede de Drenagem, Modelo digital de elevação, geoprocessamento. Risk Analysis of Degradation in Basin River Pontal – PE ABSTRACTThis study aimed to analyze the risk of degradation in the watershed of this Pontal-PE stream, from techniques of GIS and remote sensing surface. Morphometric parameters of the watershed were obtained by DEM (Digital Elevation Model) using an automatic process through geoprocessing techniques using software ARCGIS 9.3. The results showed that the Pontal stream basin has a total area of ​​6057,0 km2 and a perimeter of 464,0 km, the drainage network is 5th order being moderately branched having a total length of 2060,0 km with a course main 147,6 km, the basin had a more elongated form, with drainage density less than 0.4 km/km2 well as low-density area, the class of slope is predominantly lowland type and plan the gentle undulating represented about 90% of the total area of the basin. The classes of predominant land cover (caatinga densa, caatinga densa degradada e cultivos diversificados) occupy 5,480 km2, the area corresponding to 90,4%. The major sediment-producing areas are near the drainage network.Keywords: Drainage network, elevation digital model, geoprocessing.

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

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.

scholarly journals Geospatial Approach for Quantitative Drainage Morphometric Analysis of Varuna River Basin, India

2019 ◽  
Vol 12 (2) ◽  
pp. 1-25 ◽  
Author(s):  
Praveen Kumar Rai ◽  
Prafull Singh ◽  
Varun Narayan Mishra ◽  
Anisha Singh ◽  
Bhartendu Sajan ◽  
...  
Keyword(s):  
River Basin ◽  
Morphometric Analysis ◽  
Drainage Network ◽  
Stream Network ◽  
Basin Morphometry ◽  
Digital Elevation ◽  
Basin Geometry ◽  
Study Zone ◽  
Drainage Texture ◽  
Elevation Model

Abstract An assessment of Varuna river basin of India was performed to study the various drainage parameters in GIS platform. The delineation of drainage network is possible either physically from topographic sheets or with the help data of Digital Elevation Model (DEM) by methods for calculation techniques. Extraction of the basin and sub-basins, stream network has been produced to evaluate the drainage characteristics in the study zone. The entire Varuna river basin has been subdivided into 3 sub-watersheds and 41 morphometric parameters have been computed under four broad categories i.e. drainage network, basin geometry, drainage texture, and relief characteristics. The morphometric analysis has been performed and different parameters have been correlated with each other to understand their underlying connection and their role over the basin hydro geomorphology. The study discloses different types of morphometric analysis and how they influence the soil and topography of the basin. The investigation and estimation of basin morphometry and relief parameters in GIS will be of massive utility in catchment area advancement, understanding the watershed for natural resource evaluation, planning and administration at any scale. The outcomes thus generated equip us with significant knowledge and may also provide an input that are essential in decision making for watershed planning and drainage development of the watershed.

scholarly journals Comparative Study of Landsat and Aster Data by Morphometric Analysis

2015 ◽  
Vol 1 (2) ◽  
pp. 21-25 ◽  
Author(s):  
Sujit Kumar ◽  
Tapasi Bhandary
Keyword(s):  
Comparative Study ◽  
Morphometric Analysis ◽  
Axial Length ◽  
Order Stream ◽  
Average Width ◽  
First Order ◽  
Aster Data ◽  
Digital Elevation ◽  
Elevation Model

In this paper, a case-study is presented to differentiate between Landsat and Aster data by morphometric analysis. For this the Aster and Landsat digital elevation model (DEM) data of the same study area was taken and then both the data was delineated for the same (common) outlet. The major differences found in between Landsat and Aster data after delineation are in the number of first order stream, axial length of streams, average width and size of watershed. The case study presented will be useful in demonstrating the fact that Landsat DEM has better accuracy than Aster DEM for land cover areas when the DEM data characteristic are kept similar.

scholarly journals Quantitative Morphometric Analysis of the Adula Watershed, in Ahmednagar Maharashtra Using the ESRI- ArcGIS Tool

2019 ◽  
pp. 1-10
Author(s):  
Varsha Mandale ◽  
Ravindra Bansod
Keyword(s):  
Morphometric Analysis ◽  
Drainage Density ◽  
Maximum Height ◽  
Morphometric Characteristics ◽  
Bifurcation Ratio ◽  
Order Stream ◽  
Digital Elevation ◽  
Density Factor ◽  
Drainage Texture ◽  
Elevation Model

Remote sensing and geographic information system (GIS) are two of the most important tools used to evaluate the morphometric characteristics of watersheds, as morphometric analysis of river basins using conventional methods, is very time to consume, laborious and cumbersome. In this study, the morphometric characteristics of the Adula watershed were calculated using ESRI- ArcGIS. The areal extent of the Adula watershed varies between 19°32’40” N to 19°43’2” N latitude and 74°10’15” E to 74°48’18” E longitude. The topographic sheets obtained from the survey of India on a scale of 1:50000 and the SRTM (Spectral Radar Topographic Mission) Digital Elevation Model of 30 m resolution, were used for watershed delineation and deriving the linear (stream order, stream number, bifurcation ratio), aerial (basin area, basin perimeter, drainage density, form factor, stream frequency, and circulatory ratio), relief (height of  outlet of watershed, basin relief, maximum height of watershed, total basin relief, absolute relief, relief ratio, ruggedness number) aspects. bifurcation ratio for varies from 3.0 to 8.33, indicating the elongated shape of the watershed. Drainage density factor values were 4.43 km/km2 indicating high drainage densities and 0.132 indicating an elongated basin with lower peaks respectively. Ruggedness number was 3.78 showing a dendritic and radial pattern with drainage texture. Therefore this morphometric analysis using geo-processing techniques employed in this study will assist in planning and decision making in the watershed development and management.

scholarly journals Extração Automática de Drenagem: uma Análise Comparativa a Partir de Diferentes Ferramentas e Bases de Dados (Draining automatic extraction: a comparative analysis of different from the tools and databases )

2016 ◽  
Vol 9 (6) ◽  
pp. 1849
Author(s):  
Reurysson Chagas de Sousa Morais ◽  
Marta Celina Linhares Sales
Keyword(s):  
Large Scale ◽  
River Basins ◽  
Morphometric Parameters ◽  
Topographic Mapping ◽  
Automatic Extraction ◽  
Drainage Network ◽  
Computational Tools ◽  
Digital Elevation ◽  
Elevation Model ◽  
Manual Correction

A necessidade de planejamento e gerenciamento de bacias hidrográficas tem incitado pesquisa que buscam compreender sua dinâmica hidrológica. Em regiões que apresentam carência de mapeamento topográfico em grande escala, é comum o uso de modelos digitais de elevação (MDE) para extração automática da rede de drenagem, delimitação de bacias hidrográficas e obtenção de parâmetros hidrográficos e morfométricos. Diante deste cenário o presente trabalho teve como objetivo avaliar a eficiência de duas ferramentas computacionais (Hydrology e TauDEM) e três bases de dados (SRTM, AGEDM e AW3D) para a extração de rede de drenagem e cálculo de parâmetros hidrográficos. Concluiu-se que o software TauDEM representa a melhor solução da extração de drenagem, pois minimiza a geração de drenagem retilínea e paralela em áreas de relevo plano. Dentre as bases de dados, a drenagem extraída dos dados AW3D apresentaram maior correspondência com drenagem de referência do IBGE. De modo geral, os parâmetros morfométricos calculados para a Bacia Hidrográfica do Alto Gurguéia (BHAG), a partir das três bases de dados selecionadas, não apresentaram diferenças significativas, indicando o potencial das ferramentas e bases de dados para análises hidrográficas de médias e grandes bacias. Em todo caso, recomenda-se a inspeção e correção manual da rede de drenagem ao aplicar qualquer método de extração automática, com o intuito de reduzir os erros decorrentes das limitações dos softwares.   A B S T R A C T The need for planning and management of river basins has prompted research that seek to understand their hydrological dynamics. In regions with lack of topographic mapping on a large scale, it is common to use digital elevation models (DEM) for automatic drainage network extraction, delineation of watersheds and obtain hydrographic and morphometric parameters. Against this background the present study aimed to evaluate the efficiency of two computational tools (Hydrology and TauDEM) and three databases (SRTM, AGEDM and AW3D) for drainage network extraction and calculation of hydrographic parameters. It was concluded that the TauDEM software is the best solution drain extraction, because it minimizes the generation of rectilinear and parallel drainage in flat terrain areas. Among those databases, the drainage extracted of the AW3D data had higher correlation with the IBGE reference drainage. Overall, the morphometric parameters calculated for the basin of the Upper Gurguéia (BHAG), from the three selected databases, no show significant differences, indicating the potential of tools and databases for hydrographic analysis of averages and large basins. In any case, it is recommended to inspection and manual correction of the drainage network when applying any automatic extracting method, in order to reduce errors due to limitations of the software. Keywords: Drainage Neytwork. Digital Elevation Model. Geoprocessing.  

scholarly journals Morphometric analysis and watershed prioritization in relation to soil erosion in Dudhnai Watershed

2021 ◽  
Vol 11 (9) ◽  
Author(s):  
W. R. Singh ◽  
S. Barman ◽  
G. Tirkey
Keyword(s):  
Soil Erosion ◽  
Water Conservation ◽  
High Surface ◽  
Drainage Density ◽  
Morphometric Parameters ◽  
Geographical Information ◽  
Gis And Remote Sensing ◽  
Digital Elevation ◽  
Elevation Model

AbstractMorphologic parameters of a watershed could help in segregating critical sub-watersheds for taking up conservation practices and mitigation interventions. Determination of critical watersheds or prioritization of sub-watersheds is inevitable for efficient and sustainable watershed management programs and allocation of its natural resources. The traditional methods of determination of morphologic parameters are time consuming, expensive and requires huge labor. However, the process becomes easier, cheaper and faster with the advent of Geographical Information System (GIS) and remote sensing technologies. In the present study, a combined approach of using toposheet, remotely sensed digital elevation model and morphometric ArcGIS toolbox has been adopted to determine morphometric parameters in Dudhnai river basin, a sub-basin of river Brahmaputra which is prone to both erosion and sedimentation. Seven sub-watersheds of Dudhnai have been prioritized by using the morphometric parameters and ranked them according to its vulnerability to soil erosion. The results of bifurcation ratio, drainage density, drainage intensity and constant of channel maintenance showed that Dudhnai watershed is a well-dissected watershed with less risk to flooding and soil erosion. However, significantly high values of infiltration number and ruggedness number obtained are indicative of very low infiltration which may result in high surface runoff and soil erosion. The study also revealed that channel erosion is stronger than sheet erosion in the basin. The prioritization of the sub-watersheds implied that Chil sub-watershed is the most susceptible sub-watershed that needs greater attention for soil and water conservation measures. The results of the present study could aid various stakeholders who are involved in the watershed development and management programs.

scholarly journals MORPHOMETRIC ANAYSIS OF THE MAJOR VALLEY SYSTEMS AROUND BENGALURU

2021 ◽  
Vol 9 (07) ◽  
pp. 991-1002
Author(s):  
Pavithra C.J ◽  
◽  
Balakrishna H.B ◽  
Aravinda P.T ◽  
◽  
...  
Keyword(s):  
Morphometric Analysis ◽  
Management Plan ◽  
Drainage Density ◽  
Drainage Pattern ◽  
Order Stream ◽  
Digital Elevation ◽  
Elevation Model ◽  
Digital Elevation Model Data ◽  
Gis Software ◽  
Fifth Order

The three major Valley systems of Bengaluru namely Vrishabhavathi Valley, Hebbal Valley and Kormangala-Challaghatta Valley houses many lakes and play a very important role in its hydrological processes. The morphometric analysis helps us to learn about the characteristics of the underlying rock type, pervious nature of soil, slope gradients, runoff behavior and water retention potential within the Valley systems. Morphometric analysis was carried out for Linear, areal and relief aspects. The Survey of India topographical maps and Digital Elevation Model data were used to prepare the base map and the drainage maps with the help of GIS software. The Strahler system of stream ranking was adopted. Among the three Valleys, Vrishabhavathi Valley is observed to be the largest Valley in terms of area and perimeter. Vrishabhavathi Valley basin has sixth order stream as the highest stream order where as the other two Valleys have fifth order stream as the highest order. The drainage pattern formed within the Valley systems was observed to be dendritic. The watershed shape factor showed that the Vrishabhavathi Valley is elongated in shape where as the K-C Valley and the Hebbal Valleys are less elongated in shape comparatively. The drainage density of the three Valleys revealed that they fall under coarse drainage density classification. The relief aspects of the three Valleys exhibit low reliefs indicating a flat surface. This helps in designing a sustainable management plan for the three major Valley systems in terms of their conservation and also ensure sustainable soil and water usage within the Valley systems.

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