- Biogeography (19)
- Climatology (36)
- Environment (76)
- Geomorphology (57)
- GIS and Remote Sensing (18)
- Human and economic geography (62)
- Hydrology (54)
- Regional geography (45)
- Tourism (42)
- Various (33)
Geographical studies and environment protection research
Subjects
Volume XIII | Issue 1
River Change Detection and Bankline Erosion Recognition using Remote Sensing and GIS
Abstract: Bangladesh is mainly formed by alluvial deposits, facing riverbank erosion very frequently due to unvarying alteration of river channels. This study is aimed at computing the actual bank shifting along the Manu River within Bangladesh for a period of thirteen years (1997-2010). The entire course of Manu River from upstream of India Border, Moulvibazar to the confluence with the Kushiyara River at Manumukh, Sherpur for a stretch of around 69 km has been studied using an integrated approach of Remote Sensing and Geographical Information System (GIS). The channel configuration of the Manu River has been mapped for the years 1997 and 2010 using Landsat satellite images. The analysis divulged that the Manu River is a highly meandering river with several very critical sections where the river has been suffering enormously with the erosion problem and shifting characteristics. The enumerated river shifting was found very high as the maximum left bank shifting and maximum right bank shifting had occurred at Rajnagar, Moulvibazar of 656 m and 628 m respectively, in the mentioned period. The results deliver latest and steadfast evidence on the dynamic fluvio-geomorphology of the Manu River for designing and execution of erosion control schemes.
Full article 10.5775/fg.2067-4635.2014.038.iDates:
Received: 06-12-2012 Accepted: 11-12-2013 Printed: 02-06-2014 Online: 08-08-2014
Affiliations:
- 1 Department of Civil Engineering, Stamford University Bangladesh, Dhaka, Bangladesh
- 2 Center for Environmental and Geographic Information Services, Dhaka, Bangladesh
Citation:
Copyright:
© 2014 The Author(s). Published by Forum geografic.
Provided under the Creative Commons Attribution-NonCommercial-NoDerivatives License.
Open Access article.
Provided under the Creative Commons Attribution-NonCommercial-NoDerivatives License.
Open Access article.
Volume XIII | Issue 1
Preliminary data on the Jiu River meanders in the lower course (South-West Romania)
Abstract: The aim of this study is the complex monitoring of the Jiu river bed in terms of geometry and complexity of meanders in its lower sector (on a length of 77 km). The detailed analysis of the lower Jiu sector meanders completes the geomorphologic knowledge of rivers in Romania, starting from the identification and determination of the type of meanders: the results that were achieved are represented by the indexes concerning their age and migration rate (wavelength, 1977 – 4721 m; meanders amplitude, 511 – 2862 m; the mean radius of curvature, 270 – 997 m and the sinuosity index, from 0.87 to 2.17). Another aim of this study is the identification of the evolution features of the Jiu river, the relationships between some hydrological factors of control (liquid flow and suspended sediments – annual average values) and the generations of meanders (actual or open meanders, and incised meanders or paleomeanders) distributed in two sectors: Podari – Padea sector and the sector stretching from Padea up to the Danube confluence. In addition, our concern is motivated by the fact that in the last years there were analyzed the landslides and subsidence on the right slope of the Jiu river (next to Bâzdâna and Drănic settlements), strongly eroded and in close connection with the meandering of the watercourse.
Keywords: meanders, morphological parameters, paleomeanders, actual meanders, lower sector, Jiu River
Full article 10.5775/fg.2067-4635.2014.051.iDates:
Received: 08-03-2013 Accepted: 11-09-2013 Printed: 02-06-2014 Online: 08-08-2014
Affiliations:
Corresponding author:
Citation:
Copyright:
© 2014 The Author(s). Published by Forum geografic.
Provided under the Creative Commons Attribution-NonCommercial-NoDerivatives License.
Open Access article.
Provided under the Creative Commons Attribution-NonCommercial-NoDerivatives License.
Open Access article.
Volume XIII | Issue 1
Remote Sensing data & GIS for flood risk zonation mapping in Varanasi District, India
Abstract: Flood is one of the natural disasters causing colossal loss of life and property. It occurs with a strange regularity in different parts of India, thus devastating those particular areas. The most flood prone areas in the country are in the Ganga and Brahmaputra basins whilst the annual flood damages in the Ganga basin account for about 60 percent of the total. The extent of the damages shows a pattern of increase from west to east (downstream along the Ganga) and from south to north (towards the hills). The present study delineates the application of geographic information system (GIS) in mapping flood risk zones in Varanasi, one of the prominent districts of the Indo-Gangetic plain. The whole district witnesses havoc of flood in rainy season due to impounding of huge amount of water in the Ganga river. The damage and loss of life and cattle due to floods in the area under study are increasing year after year. It could be stated that high magnitude floods occurred in 2013 during the month of August, when the flood plains were mostly used for periodicity and gravity of food. Recognition of flooding parts and flood risk zones in the area under study are the primary steps in the flood control measures. GIS data base has been well utilized in delineating and tackling flood related problems in the area. An attempt has been made to prepare a map of an area measuring about 1526 sq. km. showing flood risk zone with the help of remote sensing data (IRS-P6, LISS III, 2008). A total of five flood risk zones are delineated in Varanasi district. With the help of remote sensing data, flood risk zones in the study area are categorized into low, middle, high, higher and highest level flood zones.
Full article 10.5775/fg.2067-4635.2014.041.iDates:
Received: 01-02-2014 Accepted: 25-05-2014 Printed: 02-06-2014 Online: 08-08-2014
Affiliations:
Corresponding author:
Citation:
Acknowledgements:
Authors express sincere gratitude to Mr. Ajay Kumar Shrivastava for his support in this work.
Copyright:
© 2014 The Author(s). Published by Forum geografic.
Provided under the Creative Commons Attribution-NonCommercial-NoDerivatives License.
Open Access article.
Provided under the Creative Commons Attribution-NonCommercial-NoDerivatives License.
Open Access article.
Volume XIII | Issue 1
Extreme low flow of the Topolovets and Voinishka Rivers (Danube tributaries, Bulgaria)
Abstract: The minimal stream flow is the most sensitive characteristic of stream flow. The aim of the paper is the assessment of the duration and the frequency of low flow through threshold method on daily discharges. The daily data of the two Danube tributaries (the Topolovets and Voinishka) have been used. The results present the following: low flow typically appears in the summer and episodically in the spring and winter; the duration varies between some days to month; the spatial distribution of extreme minimum flow is discrete and depends on climatic and anthropogenic activities. The method of quantiles gives good threshold level for defining extremely low stream flow, but have to apply in keeping with concrete conditions and purposes.
Full article 10.5775/fg.2067-4635.2014.066.iDates:
Received: 06-05-2013 Accepted: 30-11-2013 Printed: 02-06-2014 Online: 08-08-2014
Affiliations:
- 1 Faculty of Geology and Geography, Sofia University St. Kliment Ohridski, 15 Tsar Osvoboditel Blvd, Sofia, Bulgaria
Citation:
Copyright:
© 2014 The Author(s). Published by Forum geografic.
Provided under the Creative Commons Attribution-NonCommercial-NoDerivatives License.
Open Access article.
Provided under the Creative Commons Attribution-NonCommercial-NoDerivatives License.
Open Access article.
Volume XIII | Issue 1
The analysis of the susceptibility of the flash-floodsʼ genesis in the area of the hydrographical basin of Bâsca Chiojdului river
Abstract: The present article aims to identify the areas with high susceptibility in the acceleration of the surface flowing of the water and thus, in the delivery of the flash-floods from the hydrographical basin of the Bâsca Chiojdului river, which is situated in one of the most vulnerable areas in Romania (bend area) at the hydrological phenomena of risk. The analysis of the susceptibility was possible by taking into consideration ten main factors that we considered to play an essential role in the genesis of the flash-floods. There resulted a map of the flankʼs surfaces with high susceptibility in the flash-floods’ delivery and their triggering at the layer level of the hydrographical network in the basin. The proposed index, FFSI (Flash Floods Susceptibility Index), resulted from the summation of the analyzed factors, presents mainly the highest values within the area of Drajna Depression, where most of the settlements from the basin are located. The high genesis susceptibility of the flash-floods in this area is due to the association of the most numerous risk factors that we analysed, namely lithology favourable to the pronounced flowing, slopes with high values, high degree of deforestation etc. The areas identified as being critical from the point of view of the potential of flash-floods formation present a high risk for the genesis and triggering other related phenomena such as floods and landslides.
Full article 10.5775/fg.2067-4635.2014.071.iDates:
Received: 06-12-2012 Accepted: 30-03-2013 Printed: 02-06-2014 Online: 08-08-2014
Affiliations:
Corresponding author:
Citation:
Acknowledgements:
This paper has been financed through the contract POSDRU/86/1.2/S/57462, strategic project “Education and professional training in support of the economic growth and the development of the knowledge-based society”, “Quality in the higher education”, co-financed by the European Social Fund, through the Sectoral Operational Programme for the Human Resources Development 2007-2013.
Copyright:
© 2014 The Author(s). Published by Forum geografic.
Provided under the Creative Commons Attribution-NonCommercial-NoDerivatives License.
Open Access article.
Provided under the Creative Commons Attribution-NonCommercial-NoDerivatives License.
Open Access article.
Keywords
agriculture
Banat
Bucharest
Bulgaria
climate change
COVID-19
Craiova
cultural tourism
Danube
deindustrialization
demographic decline
drought
Environment
erosion
European Union
flash flood
flood risk
geodiversity
geomorphology
geomorphometry
GIS
human pressure
Hungary
land cover
landscape
land use
morphometry
Oltenia Plain
pollution
precipitation
regional development
remote sensing
Romania
rural-urban fringe
rural area
rural tourism
Serbia
Southern Carpathians
sustainability
sustainable development
tourism
urban development
urban sprawl
urban transport
water pollution
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