scholarly journals Quantitative Assessment of Hab Watershed Using Geoinformatics

Land Science ◽  
2019 ◽  
Vol 1 (1) ◽  
pp. p1
Author(s):  
Rakhshanda Sadaf ◽  
Abel Ramoelo ◽  
Rana Zain Nabi khan ◽  
Isma Younes ◽  
Haris Zafar
Keyword(s):  
Morphometric Analysis ◽  
Drainage Density ◽  
Soil Drainage ◽  
Geospatial Technology ◽  
Climate Conditions ◽  
Hydrological Characteristics ◽  
Subsurface Material ◽  
Drainage Texture ◽  
Morphometric Assessment ◽  
Typical Soil

Morphometric assessment of the watersheds is considered highly critical to appraise its hydrological characteristics, such as, general geology, structure, geomorphology and climate conditions. In this study, morphometric analysis of Hab Watershed has been carried out through Geospatial Technology (RS & GIS) in a systematic manner to examine its Geo-hydrological characteristics. The drainage network of Hab is typically dendritic and semi-dendritic indicating its heterogeneous lithology. Recent study reveals increase in stream order, substantially decreases the stream total length. drainage density of the Hab Watershed indicates the characteristics of its typical soil. Drainage texture value for Hab watershed is 0.18. Low drainage density value reveals that the region has a permeable and porous subsurface material with low relief. The shape of the basin has been observed as quite elongated. The findings of this study reveal that GIS based morphometric analysis is highly effective tool for geo-hydrological study of watersheds.

scholarly journals Use of Geospatial Tools in Morphometric Analysis and Prioritisation of Sub-Catchments of the Soungrougrou (Casamance Basin)

2021 ◽  
Vol 0 (0) ◽  
Author(s):  
Cheikh Faye ◽  
Modou Ndiaye
Keyword(s):  
Morphometric Analysis ◽  
Water Conservation ◽  
Drainage Density ◽  
Geospatial Technology ◽  
Flow Length ◽  
Geospatial Tools ◽  
Mathematical Equations ◽  
Gis Environment ◽  
Drainage Texture ◽  
Conservation Plans

Abstract The prioritisation of catchments, particularly in the context of catchment plans and management programmes, is part of water resources development. In fact, morphometric analysis assisted by geospatial technology is carried out by prioritising sub-catchments according to their natural resource availability characteristics. Information on the geomorphology and erosion factors of the study area is used in the area in the preparation of local models of ungauged sub-catchments, which otherwise lack an adequate hydrological database. The objective of this paper is to use geographic information systems (GISs) in morphometric analysis to prioritise sub-catchments of the Soungrougrou (a tributary of the Casamance River). In this respect, the integrated methodology involving morphometric aspects from geospatial technology is used. To carry out the geospatial research, basic mathematical equations used in a GIS environment were used to measure a series of aspects of hydrology such as flow length, flow length ratio, bifurcation ratio, drainage density, drainage texture, flow frequency, elongation rate, circularity ratio, form factor, relief and relief ratio. The results divided the whole catchment into three priority areas, namely high, medium and low. The results are relevant for establishing soil and water conservation plans in the Soungrougrou basin, as well as adequate groundwater production and management. The high category (sub-basins 6, 8, 14, 17 and 18) is subject to maximum soil erosion, which requires immediate intervention to avoid possible natural hazards.

scholarly journals Morphometric Analysis to Infer Hydrological Behaviour of Lidder Watershed, Western Himalaya, India

2013 ◽  
Vol 2013 ◽  
pp. 1-14 ◽  
Author(s):  
Farrukh Altaf ◽  
Gowhar Meraj ◽  
Shakil A. Romshoo
Keyword(s):  
Morphometric Analysis ◽  
Western Himalaya ◽  
Drainage Density ◽  
Vital Role ◽  
Integrated Analysis ◽  
Mountain Range ◽  
Drainage Pattern ◽  
Entire Study ◽  
Drainage Patterns ◽  
Drainage Texture

West Lidder River, in the Northwest Greater-Himalayan mountain range, is the major source of irrigation and drinking water supplies for the Kashmir Valley with a population of seven million people. The major source of water for the whole Lidder River is snow and icemelt emanating from its two subcatchments East Lidder and West Lidder. Snowmelt significantly contributes to the evolution of drainage patterns in this area. Quantitative morphometry plays a vital role in routing the snowmelt and other hydrological processes. Morphometric analysis of the West Lidder River catchment was carried out using geospatial technique. The outcome revealed that the entire study area has uniform lithology and is structurally permeable. The high drainage density of all subwatersheds indicate more surface runoff. The morphometric analysis also indicates that the area is more prone to weathering due to very-coarse to coarse drainage texture. All the subwatersheds showed dendritic to subdendritic drainage pattern. An immense control of structure on the drainage in some subwatersheds is indicated by their high bifurcation ratios. Circulatory and elongation ratios show that the subwatersheds have elongated to circular shapes. From the integrated analysis of the morphometric parameters, important hydrologic behaviour of 17 subwatersheds could be inferred.

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 Assessment of Groundwater Recharge Potential Depending on Morphologic Analysis in East of Wasit, Southeastern Iraq

2021 ◽  
Vol 54 (2D) ◽  
pp. 138-154
Author(s):  
Mohammed S. Shamkhi
Keyword(s):  
Groundwater Recharge ◽  
Morphometric Analysis ◽  
Drainage Density ◽  
Eastern Region ◽  
Elongation Ratio ◽  
Recharge Potential ◽  
The Third ◽  
Drainage Texture ◽  
Elevation Model ◽  
Semi Arid

Modern technologies are used for watershed management to cope with drought risks in arid and semi-arid regions. The study aimed to conduct a morphometric analysis and know potential groundwater recharge areas in the eastern region of Wasit Province. Remote sensing and GIS data were used for morphometric analysis. The morphometric analysis results adopted the Digital Elevation Model. The results of the analysis were verified by matching the results with what exists in reality. The area of the first basin was 1482.017, as it is the largest basin from the area, with a percent of 51.228% of the total area of all basins. The percentage of first-degree flows reached 83.37% in the first basin, 74.14% percent in the second basin, 75.51% in the third basin, and 75.75% in the fourth basin from all streams in each basin. The bifurcation rate (3.135-4.233), Stream frequency range values (0.543-0.332), drainage texture coarse, low drainage density that ranged between 0.986-1.14 km/km2 elongation ratio ranging from 0.348-0.624 form factor (0.095-0.316). The basins' circularity (0.105-0.238) relief value (951-112) m infiltration number value (0.369-0.535). All basins have a longitudinal shape and lead to the formation of floods and rapid currents, which exposes the region to rapid seasonal floods and the creation of flash floods that cause soil erosion and analyses the drainage intensity results. It was low, and this is an indication that the ground has high permeability. The flow frequency results indicate that the area is semi-arid and exposed to small amounts of rain and coarse drainage texture by comparing the result parameters from morphometric analysis results for each basin. The potential recharge areas of groundwater in the study area can be known, n as the analysis results showed that recharge potential occurs in all basins. The highest groundwater recharge is possible in the third basin and the lowest in the first basin. Morphometric analysis was performed by ARC-GIS(Arc-map10.4).

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.

scholarly journals Prioritization of Flash Flood-Prone Areas in Small Coastal Basins around the Mediterranean Using Geomorphological Variables

2021 ◽  
pp. 1-11
Author(s):  
V. A. Kotinas
Keyword(s):  
Morphometric Analysis ◽  
Flood Risk ◽  
Overland Flow ◽  
Flash Flood ◽  
Flash Floods ◽  
Drainage Density ◽  
Elongation Ratio ◽  
Management Planning ◽  
Coastal Basins ◽  
Drainage Texture

The present study aims to model flash flood risk in small coastal watersheds in areas that are characterized by Mediterranean climate through extensive morphometric analysis which can prove invaluable for the investigation of flood risk, in ungauged watersheds, where flash floods are frequent. The available topographic data (EU-DEM) are analyzed through Geographic Information Systems (GIS) to produce all the secondary variables that are necessary for this morphometric analysis. Watershed prioritization techniques that are applied on geomorphological variables have proven to be an effective way of estimating the relative flash flood risk in a sub-watershed level. A series of morphometric parameters are used (bifurcation ratio, drainage frequency, drainage density, drainage texture, length of overland flow, circularity ratio, form factor, elongation ratio) which have an effect on flood risk. In small watersheds, with intermittent runoff, this effect can be different than in larger watersheds, so our methodology differs significantly from the methodology other researchers use. The compound factor is calculated by aggregating the assigned ranks of these morphometric indices and the sub-watersheds are prioritized according to their flash flood risk. The study area is located in the island of Samos, in Eastern Greece, where flood events are usual and pose a risk to villages and infrastructure around the island. The selected watershed (Imvrasos river) is divided into several sub-watersheds (W-1 to W-8) and a series of morphometric indices are calculated and evaluated through statistical procedures and by applying prioritization techniques, in order to locate the sub-basins that have the highest risk to flash floods. Sub-watersheds W-2 and W-3 (on the southern part of Imvrasos area) show the highest prioritization values, and should be prioritized for better watershed management planning.

Geo-informatics based Morphometric Analysis of a Reservoir Catchment in Shivalik Foothills of North-West India

2021 ◽  
Vol 58 (03) ◽  
pp. 286-299
Author(s):  
Mahesh Chand Singh ◽  
Rohit Singh ◽  
Abrar Yousuf ◽  
Vishnu Prasad
Keyword(s):  
Form Factor ◽  
Soil Erosion ◽  
Morphometric Analysis ◽  
Overland Flow ◽  
Infiltration Rate ◽  
Elongation Ratio ◽  
Alos Palsar ◽  
Bifurcation Ratio ◽  
Runoff Potential ◽  
Drainage Texture

The present study examined 35 morphometric parameters related to stream/drainage network, catchment geometry, and relief aspects for hydrological characterization of the Thana Dam catchment using geospatial tools and techniques. The dam catchment was delineated using the high-resolution Advanced Land Observing Satellite Phased Array type L-band Synthetic Aperture Radar (ALOS PALSAR) Digital Elevation Model (DEM) data in ArcGIS 10.4.1 software using the Arc Hydro tools. The catchment is comprised of 4th order stream, obtained using a stream threshold value of 100 m length. The lower values of elongation ratio (0.61), circularity ratio (0.22), and form factor (0.29) indicated higher soil erosion potential, mainly due to their inverse relationship with land erodibility. Moreover, the higher values of stream frequency (15.7), drainage density (>5.0), drainage texture (7.48 km-1), and mean bifurcation ratio (4.08-6.33) indicated higher runoff potential, which would intensify the soil erosion, mainly due to their direct relationship with erodibility. Bifurcation ratio, elongation ratio, circulatory ratio, form factor, altogether indicated an elongated shape of the catchment with a fine drainage texture. The higher values of bifurcation ratio and texture ratio of the catchment also indicated severe overland flow (low infiltration rate) with a limited scope for groundwater recharge in the area, which in turn might significantly encourage the soil erosion. Overall, it was concluded that the catchment has a huge runoff potential resulting in high soil erosion due to its fine texture, impermeable subsurface material, steep slope, low infiltration rate, limited vegetation, longer duration of overland flow, and higher surface runoff. The morphometric analysis was found to be suitable for identifying catchment shape and the factors affecting hydrologic conditions and erodibility of the catchment. Thus, Geo-informatics based morphometric analysis of a reservoir catchment can be useful to study the erosion potential in relation to hydrologic (rainfall-runoff relationship) and other related land characteristics (e.g., relief, slope, infiltration rate, etc.).

Geodiversity through time: Changing badland landscapes due to anthropogenic and climatic forcing in the Northern Apennines (Italy)

2020 ◽  
Author(s):  
Mauro Soldati ◽  
Carlotta Parenti ◽  
Paola Coratza
Keyword(s):  
Morphometric Analysis ◽  
Anthropogenic Activities ◽  
Northern Apennines ◽  
Slope Aspect ◽  
Climatic Forcing ◽  
Field Surveys ◽  
Climate Conditions ◽  
Aerial Photos ◽  
Erosion Rates ◽  
Soil Depletion

<div> <p>Soil erosion is one of the most significant land degradation processes worldwide, and has produced diverse geomorphological effects in different environments according to anthropogenetic and climatic forcing. In times of global change, it is of remarkable interest to trace these changes also in terms of landscape geodiversity through time.</p> <p>This is the case of the badland landscapes that characterize relatively large sectors of the Northern Apennines (Italy) where clayey and marly terrains outcrop. Erosion rates have locally been very high, which caused widespread badland landform development, also accompanied by hazardous processes, such as the retrogression of badland scarps and rapid soil depletion.</p> <p>This study aimed at understanding the evolution of badlands in selected areas of the Province of Modena (Emilia Apennines) through landform inventory, morphometric analysis and statistical assessment of influencing factors (e.g., slope aspect, climate conditions, land use), accompanied by detailed field surveys aiming at detailed mapping the areas presently affected by badlands. Several sets of aerial photos and satellite images were selected in order to perform multitemporal geomorphological analysis, define the evolution of badlands through time and assess multitemporal geodiversity by monitoring key environmental elements. The morphometric analysis of badlands was performed with the aim of understanding the causes of their development since the 1950s in relation to anthropogenic activities and meteoclimatic trends. The research showed a progressive reduction of active badlands and stabilization of gully features, leading to a substantial diversity of geomorphological landscapes of wide sectors of the investigated area.</p> <p>This study underlines that the investigation of landscape changes can provide useful elements for the assessment of geodiversity not only in space but also through time. This approach made it possible to outline changes in geodiversity at different period of time and thus gain information on dynamic geodiversity, which is worth to be considered in land management.</p> </div>

scholarly journals MORPHOMETRIC ASSESSMENT FOR THE PROGNOSIS OF CURRENT IN APLASTIC ANEMIA PATIENTS AFTER SPLENECTOMY

2014 ◽  
Vol 5 (3) ◽  
pp. 15-19
Author(s):  
N S Fedorovskaya ◽  
D A Diakonov ◽  
N A Fedorovskaya ◽  
V N Pankov
Keyword(s):  
Aplastic Anemia ◽  
Morphometric Analysis ◽  
Weight Reduction ◽  
Light Microscope ◽  
Immunosuppressive Treatment ◽  
White Pulp ◽  
Average Area ◽  
Functional Zones ◽  
Definition Of ◽  
Morphometric Assessment

The article presents the method of definition of the forecast of current in aplastic anemia patients after splenectomy, based on morphometric analysis of functional zones of a spleen in histologic cuts at painting by hematoxylin and eosine. At an estimation of a preparation in a light microscope by means of the computer program calculated the average area of a white pulp, further calculated its weight. Reduction in weight of a white pulp of a spleen below 10,0 g testifies to the favorable forecast of current aplastic anemia, increase - more than 10,0 g specifies adverse current of disease. This method is allows to solve differently the indications for immunosuppressive treatment of patients with given pathology after splenectomy.

scholarly journals Estimation of Morphometric Parameters of Karatoya sub-River Basin in Bangladesh using GIS and Remote Sensing Techniques

2020 ◽  
Vol 3 (3) ◽  
pp. 73-89
Author(s):  
Muhammad Jasim Uddin ◽  
Md. Abu Hamjalal Babu ◽  
Md. Risadul Islam ◽  
Fahim Farzana ◽  
Most. Lata Khatun ◽  
...  
Keyword(s):  
Remote Sensing ◽  
River Basin ◽  
Morphometric Analysis ◽  
Secondary Data ◽  
River Network ◽  
Morphometric Parameters ◽  
Drainage Pattern ◽  
Gis And Remote Sensing ◽  
Fine Grain ◽  
Drainage Texture

Morphometric analysis identifies the relationship of various aspects in the basin area, and plays an important role for understanding the geo-hydrological characteristics of a basin. The Karatoya River is ecologically and economically significant for Dinajpur region of Bangladesh. In this study, the morphometry of a sub-portion of Karatoya River in Birganj upazila was assessed by using GIS and remote sensing. The secondary data from ASTER DEM data and DEM data of Bangladesh were used to represent the morphologic and geo-hydrologic nature of the basin. The study computed and assessed more than 31 morphometric parameters in all aspects of the river basin. Morphometric analysis of the river network and the basin revealed that the Karatoya sub-basin was in the 6th order river network (as Strahler’s classification) with a dendritic and parallel drainage pattern and fine grain in drainage texture. This type of analysis will lead to develop the sustainable framework for agricultural and watershed management to be used by the local administration.

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