scholarly journals Geographic Concerns on Flood Climate and Flood Hydrology in Monsoon-Dominated Damodar River Basin, Eastern India

2015 ◽  
Vol 2015 ◽  
pp. 1-16 ◽  
Author(s):  
Sandipan Ghosh ◽  
Biswaranjan Mistri
Keyword(s):  
Carrying Capacity ◽  
West Bengal ◽  
Extreme Rainfall ◽  
Regulation System ◽  
Gangetic Plain ◽  
Existing Problems ◽  
Damodar Valley ◽  
Prolonged Duration ◽  
Damodar River ◽  
Damodar River Basin

In the Lower Gangetic Plain of West Bengal, the furious monsoon flood of Damodar River is a recurrent hydrometeorological phenomenon which is now intensified by the human activities. At present, the flood regulation system of Damodar Valley Corporation (DVC) is not capable of managing gigantic inflow water (which appeared as surface runoff and channel flow) coming from the wide fan-shaped upper catchment of Damodar River. As a result, the lower basin of Damodar (covering Barddhaman, Hooghly, and Howrah districts of West Bengal) annually experiences low to high magnitude of floods and overflow condition because the existing canal system, streams, palaeochannels, and Damodar River itself have lost their former carrying capacity to accommodate all excess water within its active domain due to over siltation and drainage congestion. So when the DVC dams are not able to regulate flood flow, then extreme rainfall of prolonged duration over the basin turns the normal situation into devastating flood, like the years of 1978 and 2000 in West Bengal. Identifying the existing problems of lower Damodar River, this paper principally tries to assess the potentiality of flood climate and to estimate the contributing rainfall-runoff, peak discharge, and existing carrying capacity of river in relation to increasing flood risk of lower basin using the quantitative hydrologic expressions.

scholarly journals Assessment of Dam-Induced Changes in Ecogeomorphological Behaviour and Fluvial Functionality in the Damodar River, West Bengal, India

2021 ◽  
Author(s):  
Sandipan Ghosh ◽  
Md. Mofizul Hoque ◽  
Ujwal Deep Saha ◽  
Aznarul Islam
Keyword(s):  
West Bengal ◽  
Ecological Integrity ◽  
Sand Mining ◽  
Agricultural Growth ◽  
Flow Alteration ◽  
Damodar Valley ◽  
Damodar River ◽  
Ecological Functionality ◽  
Induced Changes ◽  
Basin Area

Abstract Anthropogenic interventions in the form of dams and barrages often alter the fluvial functionality and ecogeomorphological (geomorphology, hydrology, and ecology) behaviour of the river systems. The present work examines the environmental flow, channel metamorphosis, and fluvial functionality of Damodar River in the context of Damodar Valley Corporation (DVC) dams and development. The structural (dams, barrages, weirs, etc.) and non-structural (urban-industrial and agricultural disposal with effluents, sand mining, etc.) interventions hinder the ecological functionality of the river. This study portrays that the eco-geomorphological behaviour and fluvial functionality of the river have changed due to flow alteration and diversion by dams and barrages and due to the urban-industrial and agricultural growth in the basin area. These changes have affected riverine ecological integrity. The ecological functionality level of this study area ranges from 85 to 181 i.e. poor to good-fair. The ecological functionality level in sample channel sections (i.e., immediate upstream and downstream of Durgapur Barrage) is poor, and the value ranges from 61 to 100 due to the hydrological impact of the barrage and the Durgapur urban-industrial belt. This assessment work would help to restore the fluvial environment for humans as well as riverine biota.

Hydrochemistry of reservoirs of Damodar River basin, India: weathering processes and water quality assessment

2005 ◽  
Vol 48 (8) ◽  
pp. 1014-1028 ◽  
Author(s):  
Abhay Kumar Singh ◽  
G. C. Mondal ◽  
P. K. Singh ◽  
S. Singh ◽  
T. B. Singh ◽  
...  
Keyword(s):  
Water Quality ◽  
Quality Assessment ◽  
River Basin ◽  
Water Quality Assessment ◽  
Weathering Processes ◽  
Damodar River ◽  
Damodar River Basin

scholarly journals Butterfly diversity in heterogeneous habitat of Bankura, West Bengal, India

2020 ◽  
Vol 12 (8) ◽  
pp. 15804-15816
Author(s):  
Kalyan Mukherjee ◽  
Ayan Mondal
Keyword(s):  
West Bengal ◽  
Diversity Indices ◽  
Species Number ◽  
Butterfly Species ◽  
Gangetic Plain ◽  
Butterfly Diversity ◽  
Heterogeneous Habitats ◽  
Heterogeneous Habitat ◽  
Chotanagpur Plateau ◽  
Bankura District

Butterfly diversity was observed in different habitats of Bankura District, West Bengal, India.  This district is located at the junction of Chotanagpur plateau and Gangetic plain; it contains a variety of transitional habitats.  We found 117 butterfly species from our covered survey area.  The highest species recorded in the present study belonged to family Lycaenidae (30.76%) and Nymphalidae (29.91%) followed by Hesperiidae (16.23%), Pieridae (13.67%), Papilionidae (8.54%), and Riodinidae (0.85%), respectively.  Based on sighting we found that 12.82% of all the butterflies recorded were abundant in nature while 21.36% were very common, 41.88% were frequent, and 23.93% were rare. Cluster analysis and other diversity indices gives us an overall idea about environmental health.  The pattern of diversity change from plain to plateau gradient gives important insight about ecological edge effect.  High species number in relation with low individual numbers were found in forest habitat.  This preliminary study showed that heterogeneous habitats could harbour many butterflies and need proper conservation efforts to sustain it. 

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