Terrain Analysis of Malaprabha River Basin Using SAGA(System for Automated Geoscientific Analysis)

2018 ◽  
Vol 07 (01) ◽  
Author(s):  
Shafeeullah Shaik ◽  
Purandara Bekal ◽  
Ravindranath Chandrasekhar
Keyword(s):  
River Basin ◽  
Terrain Analysis

Modelling the extent of Cs-137 soil contamination patterns at the Kostica River basin (Bryansk Region, Russia)

2020 ◽  
Author(s):  
Vitaly Linnik ◽  
Alexander Sokolov ◽  
Oleg Ivanitsky ◽  
Anatoly Saveliev
Keyword(s):  
Experimental Data ◽  
Soil Contamination ◽  
River Basin ◽  
Chernobyl Accident ◽  
Global Fallout ◽  
Grid Size ◽  
Terrain Analysis ◽  
Lateral Migration ◽  
Grid Data ◽  
Fourfold Increase

<p>Digital terrain analysis may be a useful tool for modeling the extent of Cs-137 soil contamination patterns after the Chernobyl disaster. The test area of the  Kostica River basin (Bryansk Region, Russia)  covers an area of 19,4x11,6 km and is characterized by relatively low levels of <sup>137</sup>Cs contamination after the Chernobyl accident  in the range of  2.4  to 33 kBq/m<sup>2</sup>. It is just 4-18 times higher than the global fallout which was equal to 1,75 kBq/m<sup>2</sup> in 1986.</p><p>The purpose of  the research was to obtain estimates of the transformation of initial <sup>137</sup>Cs patterns as influenced by different landscape factors (DEM attributes) with a grid resolution of 100, 50 and 25 m. Different kinds of DEM  curvatures calculations  may be done by using SAGA, Whitebox GAT and Grass for each grid size model.</p><p>In the case under study two informational layers were made use of  to evaluate processes of <sup>137</sup>Cs redistribution in the River Kostica basin. These are: 1) SRTM  layer with a resolution of 90 m  and  2) the data of air-gamma survey with a resolution of 100 m.  The total watershed area of the Kostica River occupies 225 km<sup>2</sup>. SRTM data were resampled in a coordinates and georeference system of AG (air-gamma survey was represented in the Gauss-Kruger coordinate system) lay  with a resolution of 100 m.</p><p>The results of the air gamma survey conducted in the summer of 1993, give clear evidence that the processes of <sup>137</sup>Cs lateral migration took place due to nearly a fourfold increase of <sup>137</sup>Cs in the lower slope as compared to the surface of the watershed during a seven-year period after the Chernobyl accident.</p><p>We examine the effect of grid size of the  digital elevation model (DEM) on the erosion simulations. For resampled grid data with a resolution  of 50 and 25 m  we apply SAGA-GIS Module “Resampling” and compare the results with those of  the original method of simplicity versus fitting (SvF).  The method SvF is devoted to finding a compromise between simplicity of the model and precision of replication of experimental data. The integral in the range of squared second derivatives was used as a measure of simplicity, with usual standard deviation being applied as a measure for replication of experimental data.</p><p>The study is based on the concept of sediment and hydrological connectivity. We apply GIS-based models considering lateral soil migration to analyze sediment cascade systems. Soil erosion was evaluated based on an analysis of Cs-137 migration determined using the LS factor implemented by GRASS GIS.</p><p>The reported study was funded by RFBR according to the research project № 20-07-00701A </p>

Perencanaan Sistem Pengurangan Sampah Permukiman Bantaran Sungai Cidurian Kota Bandung

2019 ◽  
Vol 4 (2) ◽  
Author(s):  
Raka Maulana ◽  
Yulianti Pratama ◽  
Lina Apriyanti
Keyword(s):  
Waste Management ◽  
River Basin ◽  
River Flow ◽  
Waste Reduction ◽  
Residential Areas ◽  
Community Based ◽  
Inorganic Waste ◽  
Waste Bank ◽  
The City

<p>Some areas in the city of Bandung is an area that dilitasi by the flow of the river, to prevent the introduction of garbage into the river basin is necessary to note the waste management systems in residential areas along the river. Cidurian river has a length of 24.86 Km along the river flow. Consists of the city of Bandung and Bandung regency. Administrative regions Cidurian River past eight (8) districts, from the region in the District Kiaracondong precisely Village Babakan Babakan Sari and Surabaya populous and the most densely populated. Thus, there should be community-based waste management in the form of a reduction in resources to prevent potential entry of waste into the river basin. Planning waste reduction will be divided into two, namely the reduction of inorganic waste with waste bank then the reduction of organic waste with absorption holes biopori, and bio reactor mini determination of the reduction is determined by the results of the analysis of the sampling covers the composition and garbage, then the result of the measurement characteristics test and analysis results questionnaire.</p>

The main principles and results of pollution monitoring of sediments in the river basin

2020 ◽  
pp. 14-20
Author(s):  
B. Korzhenevsky ◽  
Gleb Tolkachev ◽  
Nikolay Kolomiycev
Keyword(s):  
Heavy Metals ◽  
River Basin ◽  
Water Exchange ◽  
Pollution Monitoring ◽  
Small Rivers ◽  
Volga River ◽  
Natural Landscape ◽  
Volga River Basin ◽  
Ivankovo Reservoir ◽  
Selection Of

The problems of modern geological ecology associated with the study of pollution of sediments of water bodies by heavy metals are considered. The Volga River basin is quite heterogeneous, both in geomorphological and hydrological terms, and in thechnogenical development and usage. A fourrank taxonomy is presented for the selection of sites for monitoring, based on a combination of natural, landscape, climatic and thechnogenical factors. To the largest – the highest taxon – sites of the Ist category – bowls of reservoirs with the slopes and the urban zones, industrial and agricultural structures located within them are carried. Within these areas are allocated to smaller taxa, areas category IInd are the industrial and urban zones, areas category IIIrd are the small rivers without significant contamination and areas category IVth to conduct special observations. The examples of special observations in the study of the annual migration of heavy metals in the system «bottom sediments – water column» on the Ivankovo reservoir are highlighted. The investigations were carried out under the conditions of the standard flow rate for this reservoir and in the conditions of slow water exchange.

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