Assessing gully erosion susceptibility in Mayurakshi river basin of eastern India

2018 ◽  
Vol 22 (2) ◽  
pp. 883-914 ◽  
Author(s):  
Sandipta Debanshi ◽  
Swades Pal
Keyword(s):  
River Basin ◽  
Gully Erosion ◽  
Eastern India

scholarly journals Hydro-Geophysical Study for Well Design in Lower Reaches of Kasai River Basin, Eastern India

2022 ◽  
Author(s):  
Ranjan Sinha ◽  
Shalivahan Shrivastava
Keyword(s):  
River Basin ◽  
Saline Water ◽  
Research Work ◽  
Vital Role ◽  
Scientific Management ◽  
Water Interface ◽  
Eastern India ◽  
Groundwater Abstraction ◽  
Well Design ◽  
Water Wells

Abstract Saltwater intrusion and up coning in coastal aquifer is a common phenomenon brought either due to flow of seawater into freshwater aquifer originally caused by groundwater abstraction near the coast or due to wrong casing design of water wells. This necessitates a study of aquifer disposition along with demarcation of fresh water saline water interface of Kasai River basin, Eastern India to determine the depth to freshwater and recommend the borehole design. In this study geophysical and hydrogeological techniques were employed to map to demarcate fresh and saline water interface. The phenomenon of saline water up coning is also noticed and accordingly water wells have been designed. For the said study, twenty two geophysical logs, sixty five lithological logs and hydrogeological data of eighty eight sites spread across Kasai River basin were utilized. The study shows that there are three regional aquifers exist in the area. It is recommended that water wells in the study area is to be constructed with artificial gravel packing of size 2-3mm and screen slot size is suggested to be 1.2mm. Since the sites are affected with saline water, hence isolation of zone is mandatory with proper cementing material or packer. This research work is able to develop a design model for the boreholes located in the area. The work as a whole will serve as a vital role in scientific management of groundwater resource and enable the rational planning in coastal aquifers so as to avoid fresh and saline water intermixing and up-coning.

scholarly journals Impacts of Stone Mining and Crushing on Stream Characters and Vegetation Health of Dwarka River Basin of Jharkhand and West Bengal, Eastern India

2017 ◽  
Vol 10 (1-2) ◽  
pp. 11-21 ◽  
Author(s):  
Swades Pal ◽  
Indrajit Mandal
Keyword(s):  
Water Quality ◽  
River Basin ◽  
Sediment Load ◽  
Combination Method ◽  
Eastern India ◽  
Dust Deposition ◽  
Gangetic Plain ◽  
Total Dissolved Solid ◽  
The Impact ◽  
Vulnerable Zones

AbstractDwarka River basin (3882.71 km2) of Eastern India in the Chotonagpur Plateau and Gangetic Plain is highly affected by stone mining and crushing generated dust. In the middle catchment of this basin, there are 239 stone mines and 982 stone crushing units. These produce approximately 258120 tons of dust every year and this dust enters into the river and coats the leaves of plants. On the one hand, this is aggrading in the stream bed, increasing sediment load, decreasing water quality, specifically increasing total dissolved solid, pH, water colour, and it also degrades the vegetation quality. Vegetation quality is also degraded as indicated by decreasing of NDVI values (maximum NDVI in 1990 was 0.70 and in 2016 it was 0.48). Considering all these issues, the present paper intends to identify dust vulnerable zones based on six major driving parameters and the impact of the dust on river morphology, water quality and vegetation quality in different vulnerable zones. Weighted linear combination method (in Arc Gis environment) is used for compositing the selected parameters and deriving vulnerable zones. Weight to the each parameter is assigned based on analytic hierarchy process, a semi quantitative method. According to the results, 579.64 km2(14.93%) of the catchment area is very highly vulnerable: Here 581 rivers have a length of 713 km and these riversare prone to high dust deposition, increased sediment load and water quality deterioration.

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