scholarly journals Morphometric analysis for flood flow formation feature identification (on example of Ulaanbaatar agglomeration)

2021 ◽  
Vol 44 (4) ◽  
pp. 458-470
Author(s):  
E. A. Kozyreva ◽  
A. A. Rybchenko ◽  
S. Demberel
Keyword(s):  
Morphometric Analysis ◽  
Drainage Network ◽  
Feature Identification ◽  
Catchment Basin ◽  
Basin Morphometry ◽  
Flow Formation ◽  
Length Width ◽  
Basin Geometry ◽  
Planning And Construction ◽  
Flood Flow

Water flows with significant flow rate feature a high destructive force and can lead to catastrophic consequences. Fluvial processes caused by uneven distribution of rain precipitation over the area pose risks to the developed inland foothill territories. The purpose of this study is to carry out a quantitative morphometric analysis of the territory in order to identify the formation features of flood flows. The analysis and ranking of catchment basins are performed using a basin approach. On the basis of SRTM images and the use of stock cartographic material in the GIS program the authors have built specialized electronic maps that allow to obtain quantitative parameters reflecting the morphometry of the basins under analysis including basin geometry, drainage network and terrain relief. On example of the Ulaanbaatar agglomeration territory it is shown how initial morphometric parameters of basins and watercourses (length, width, area, perimeter, erosion dissection, drainage network density, terrain relief coefficient, Melton coefficient, etc.) form the features of flood flow. For developed territories, the initial data on the catchment basin morphometry constitute the basis for compilation of specialized maps to be used in planning and construction. The combination of morphometric indicators on the territory of the Ulaanbaatar agglomeration indicates that there is possibility of large flood formation and development of dangerous mudstone flows in some catchment basins.

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 Comparison of Open Source DEM’s for Morphometric Analysis of Micro Watersheds: A Case Study from the Midlands of Kerala

2021 ◽  
pp. 267-281
Author(s):  
Md. Majeed Pasha ◽  
K. K. Sathian
Keyword(s):  
Morphometric Analysis ◽  
Water Conservation ◽  
Thermal Emission ◽  
Shuttle Radar Topography Mission ◽  
Google Earth ◽  
Morphometric Parameters ◽  
Digital Data ◽  
Basin Geometry ◽  
Sloping Terrain ◽  
Map Data

Morphometric analysis with the help of remote sensing and GIS is now widely used to prioritise micro watersheds for planning interventions for soil and water conservation. DEM is the main digital data used to perform the morphometric analysis. There are different types of DEMs available to perform morphometric analysis using GIS techniques. But, no authentic information is available on the degree of accuracy levels of these DEMs to quantitatively determine various morphometric parameters for the watersheds in Kerala, with typical undulating and sloping terrain features. Hence, this research has been initiated to evaluate the quality of three popular DEMs viz. SRTM(Shuttle Radar Topography Mission), CARTOSAT(Cartography and satellite) and ASTER(Advanced spaceborne thermal emission and reflection Radiometer), each with 30 m spatial resolution. Two small sub watershed of Bharathapuzha river basin have been chosen for the study which are lying near to Valanchery town in Malappuram district. More than 21 morphometric parameters including drainage network, basin geometry, basin texture and basin relief characteristics were computed using these three types of DEMs and the outputs compared with google earth map. The results shows that the SRTM 30m DEM is characterized by higher accuracy compared to CARTOSAT and ASTER and has got better matching with google earth map data sources.

scholarly journals Morphometric analysis of Nandakini River Basin, Garhwal Himalaya, Uttarakhand using geospatial technology

2021 ◽  
Vol 67 (3) ◽  
pp. 232-247
Author(s):  
Gopinath Patra ◽  
◽  
Sucheta Mukherjee ◽  
Vibhash Chandra Jha ◽  
◽  
...  
Keyword(s):  
River Basin ◽  
Morphometric Analysis ◽  
Drainage Basin ◽  
Infiltration Rate ◽  
Main Central Thrust ◽  
Basin Morphometry ◽  
Load Carrying ◽  
Drainage Channels ◽  
Considerable Impact ◽  
Rainwater Runoff

Basin morphometry is a crucial method of analysis to understand the geology, lithological structure, infiltration rate of rainwater, runoff, eroded load carrying capacity and flooding potential of a drainage basin. The quantitative techniques applied for linear, aerial and relief aspects of the drainage basin elucidate the rate of erosion, the intensity of denudation and subsequently the potential of the Nandakini river basin to flooding. The morphometric analysis of the Nandakini river basin in the Garwhal Himalayan region of Uttarakhand reveals that the Rf value of the Nandakini river basin is 0.28, indicating an elongated basin shape leading to quick flooding and poor draining out of floodwaters. Similarly, an elevation difference between the highest and lowest elevation is 5380 metres aids quick runoff and deposition of eroded debris in the drainage channels, another cause of channel overflow. The Rh value is high (0.12), indicating a high channel gradient with intense erosional processes operating due to steep gradient and this has a considerable impact on the rate of erosive geomorphic processes operating. The higher elevation on the Eastern part of the basin due to the Vaikrita Thrust, the Munsiyari Thrust (ie. the southern tilting Main Central Thrust) and the Baijnath Klippe has resulted in metamorphism in Miocene and Pliocene explaining the low rate of infiltration and rapid runoff.

scholarly journals Morfometría de los equinodeos de la Familia Cassidulidae (Echinoidea: Cassiduloida)

2017 ◽  
Vol 65 (1-1) ◽  
pp. 233
Author(s):  
Alejandra Martínez-Melo ◽  
Efraín De Luna ◽  
Blanca Estela Buitrón-Sánchez
Keyword(s):  
Geometric Morphometrics ◽  
Morphometric Analysis ◽  
Taxonomic Study ◽  
Future Studies ◽  
The Family ◽  
Length Width ◽  
Qualitative Characters

Morphometrics of echinoids in the Family Cassidulidae (Echinoidea: Cassiduloida). Cassidulidae is the type family of the order Cassiduloida, and contains five genera whose morphology has complicated their taxonomic study: Australanthus, Cassidulus, Eurhodia, Paralampas, and Rhyncholampas. Many authors have applied traditional morphometric analysis (mainly length, width, and height) with varying success. We present the first approach with geometric morphometrics (three outlines: aboral, left, and posterior). Genera Eurhodia and Paralampas are more varied than the others. For future studies, we recommend larger samples, and the inclusion of size and qualitative characters such as the ambulacra and peristome. Rev. Biol. Trop. 65(Suppl. 1): S233-S243. Epub 2017 November 01. 

scholarly journals MORPHOLOGY OF PARDO RIVER WATERSHED AT THE BORDER OF THE STATES OF BAHIA AND MINAS GERAIS

2020 ◽  
Vol 28 ◽  
pp. 499-511
Author(s):  
Rodrigo Lacerda Brito Neto ◽  
Cristiano Tagliaferre ◽  
Odair Lacerda Lemos ◽  
Felizardo Adenilson Rocha ◽  
Alessandro de Paula ◽  
...  
Keyword(s):  
Land Use ◽  
Spatial Analysis ◽  
Morphometric Analysis ◽  
Catchment Area ◽  
Environmental Changes ◽  
Great Part ◽  
Drainage Network ◽  
Agricultural Activities ◽  
River Watershed

ABSTRACT The spatial analysis of watersheds, as well as the evaluation off the changes occurring in their catchment area along the time are essential for the qualification of environmental changes. This study aims to characterize morphometrically the Pardo river watershed, as well as to evaluate the changes in soil use and occupation occurring between 2001 and 2016. The morphometric analysis consisted of the determination of the geometric parameters, relief information and drainage network using Geographic Information Systems. The land use and occupation information was collected through data from the online mapping platform of the Brazilian Mapping and Land Use Mapping (MapBiomas). According to the results, morphometry indicated that the watershed has low propensity to flood occurrence and tendency to conservation; great part of its area is between 600 and 1000 m of altitude, with predominance of undulating and soft-undulating slopes. The analysis of land use and occupation showed that the area devoted to agricultural activities increased during the period evaluated and occupies most of the basin, while the area of ??forests was reduced, the second in size, and these two classes occupy more than 96 % of catchment area.

scholarly journals Hydrologic behaviour of Tapi river catchment using morphometric analysis

2014 ◽  
Vol 6 (2) ◽  
pp. 442-450 ◽  
Author(s):  
Vishal K. Ingle ◽  
A. K. Mishra ◽  
A. Sarangi ◽  
D. K. Singh ◽  
V. K. Seghal
Keyword(s):  
Remote Sensing ◽  
Morphometric Analysis ◽  
Remote Sensing Data ◽  
Drainage Density ◽  
Drainage Network ◽  
Elongation Ratio ◽  
Drainage Pattern ◽  
River Catchment ◽  
Seventh Order ◽  
Drainage Texture

The study area Tapi River catchment covers 63,922.91 Sq.Km comprising of 5 five Sub-catchments: Purna river catchment (18,473.6 sq.km) Upper Tapi catchment (10,530.3 sq. km), Middle Tapi catchment (4,997.3 sq km), Girna river catchment (10,176.9 sq.km) and lower Tapi catchment (19,282.5 sq.km.). The drainage network of 5 Sub-catchments was delineated using remote sensing data. The morphometric analysis of 5 Sub-catchments has been carried out using GIS softwares – ArcMap. The drainage network showed that the terrain exhibits dendritic to sub-dendritic drainage pattern. Stream orders ranged from sixth to seventh order. Drainage density varied between 0.39 and 0.43km/ km2and had very coarse to coarse drainage texture. The relief ratio ranged from 0.003 to 0.007. The mean bifurcation ratio varied from 4.24 to 6.10 and falls under normal basin category. The elongation ratio showed that all catchment elongated pattern. Thus, the remote sensing techniques proved to be a competent tool in morphometric analysis.

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