scholarly journals Use of a distributed catchment model to assess hydrologic modifications in the Upper Ganges Basin

2011 ◽  
Author(s):  
L. Bharati ◽  
V. Samkhtin ◽  
P. Jayakody ◽  
N. Kaushal ◽  
P. Gurung
Keyword(s):  
Ganges Basin ◽  
Catchment Model

Groundwater quality concern for wider adaptability of novel modes of managed aquifer recharge (MAR) in the Ganges Basin, India

2021 ◽  
Vol 246 ◽  
pp. 106659
Author(s):  
Sunil Kumar Jha ◽  
Vinay Kumar Mishra ◽  
Chhedi Lal Verma ◽  
Navneet Sharma ◽  
Alok Kumar Sikka ◽  
...  
Keyword(s):  
Groundwater Quality ◽  
Managed Aquifer Recharge ◽  
Aquifer Recharge ◽  
Ganges Basin ◽  
The Ganges

Opportunities for harnessing the increased contribution of glacier and snowmelt flows in the Ganges basin

Water Policy ◽  
2013 ◽  
Vol 15 (S1) ◽  
pp. 9-25 ◽  
Author(s):  
Bharat R. Sharma ◽  
Devaraj de Condappa
Keyword(s):  
Climate Change ◽  
Aquifer Recharge ◽  
Eastern India ◽  
Ganges Basin ◽  
Additional Water ◽  
Set Up ◽  
Tehri Dam ◽  
The Ganges ◽  
The Impact ◽  
The Himalaya

The topography of the Ganges basin is highly variable, with the steep mountainous region of the Himalaya upstream and the large fertile plains in eastern India and Bangladesh downstream. The contribution from the glaciers to streamflows is supposed to be significant but there is uncertainty surrounding the impact of climate change on glaciers. An application of the Water Evaluation and Planning model was set up which contained an experimental glaciers module. The model also examined the possible impacts of an increase in temperature. The contribution from glaciated areas is significant (60–75%) in the Upper Ganges but reduces downstream, falling to about 19% at Farakka. Climate change-induced rise in temperature logically increases the quantity of snow and ice that melts in glaciated areas. However, this impact decreases from upstream (+8% to +26% at Tehri dam) to downstream (+1% to +4% at Farakka). Such increases in streamflows may create flood events more frequently, or of higher magnitude, in the upper reaches. Potential strategies to exploit this additional water may include the construction of new dams/reservoir storage and the development of groundwater in the basin through managed aquifer recharge. The riparian states of India, Nepal and Bangladesh could harness this opportunity to alleviate physical water scarcity and improve productivity.

scholarly journals Are General Circulation Models Ready for Operational Streamflow Forecasting for Water Management in the Ganges and Brahmaputra River Basins?

2015 ◽  
Vol 17 (1) ◽  
pp. 195-210 ◽  
Author(s):  
Safat Sikder ◽  
Xiaodong Chen ◽  
Faisal Hossain ◽  
Jason B. Roberts ◽  
Franklin Robertson ◽  
...  
Keyword(s):  
Water Management ◽  
River Basins ◽  
Hydrologic Model ◽  
Streamflow Forecasting ◽  
Management Decisions ◽  
Brahmaputra River ◽  
Ganges Basin ◽  
Monthly Scale ◽  
Brahmaputra Basin ◽  
The Ganges

Abstract This study asks the question of whether GCMs are ready to be operationalized for streamflow forecasting in South Asian river basins, and if so, at what temporal scales and for which water management decisions are they likely to be relevant? The authors focused on the Ganges, Brahmaputra, and Meghna basins for which there is a gridded hydrologic model calibrated for the 2002–10 period. The North American Multimodel Ensemble (NMME) suite of eight GCM hindcasts was applied to generate precipitation forecasts for each month of the 1982–2012 (30 year) period at up to 6 months of lead time, which were then downscaled according to the bias-corrected statistical downscaling (BCSD) procedure to daily time steps. A global retrospective forcing dataset was used for this downscaling procedure. The study clearly revealed that a regionally consistent forcing for BCSD, which is currently unavailable for the region, is one of the primary conditions to realize reasonable skill in streamflow forecasting. In terms of relative RMSE (normalized by reference flow obtained from the global retrospective forcings used in downscaling), streamflow forecast uncertainty (RMSE) was found to be 38%–50% at monthly scale and 22%–35% at seasonal (3 monthly) scale. The Ganges River (regulated) experienced higher uncertainty than the Brahmaputra River (unregulated). In terms of anomaly correlation coefficient (ACC), the streamflow forecasting at seasonal (3 monthly) scale was found to have less uncertainty (>0.3) than at monthly scale (<0.25). The forecast skill in the Brahmaputra basin showed more improvement when the time horizon was aggregated from monthly to seasonal than the Ganges basin. Finally, the skill assessment for the individual seasons revealed that the flow forecasting using NMME data had less uncertainty during monsoon season (July–September) in the Brahmaputra basin and in postmonsoon season (October–December) in the Ganges basin. Overall, the study indicated that GCMs can have value for management decisions only at seasonal or annual water balance applications at best if appropriate historical forcings are used in downscaling. The take-home message of this study is that GCMs are not yet ready for prime-time operationalization for a wide variety of multiscale water management decisions for the Ganges and Brahmaputra River basins.

Representing a dense network of ponds and reservoirs in a semi-distributed dryland catchment model

2021 ◽  
pp. 127103
Author(s):  
Udinart Prata Rabelo ◽  
Jörg Dietrich ◽  
Alexandre Cunha Costa ◽  
Max Nino Simshäuser ◽  
Fernanda Elise Scholz ◽  
...  
Keyword(s):  
Dense Network ◽  
Catchment Model

scholarly journals When hydrosociality encounters sediments: Transformed lives and livelihoods in the lower basin of the Ganges River

2018 ◽  
Vol 1 (4) ◽  
pp. 641-663 ◽  
Author(s):  
Flore Lafaye de Micheaux ◽  
Jenia Mukherjee ◽  
Christian A Kull
Keyword(s):  
Environmental History ◽  
River Sediments ◽  
Analytical Framework ◽  
Ganges River ◽  
Colonial State ◽  
Ganges Basin ◽  
Active Channels ◽  
State Interventions ◽  
Land Water

The hydrosocial cycle is a central analytical framework in political ecological approaches to water. It helps foreground multiple and subtle interactions between water and society, culture and politics. However, to date it has dealt little with matters other than water flows. In river contexts, biotic and abiotic components play critical roles in the way people engage with and make a living out of rivers, beyond water. This article aims to advance the hydrosocial framework with a deeper consideration of the materiality of rivers. To initiate this approach, the focus is here on sediments. Lives and livelihoods connected to river sediments remain both officially and academically under-explored. This certainly applies to the context of the Lower Ganges basin whose active channels transport huge loads of sediments mainly originating from the Himalayan slopes. Building upon an environmental history perspective and drawing on three spatially nested cases in West Bengal, India, the paper analyses instances of water-sediment-society interactions. The general case study presents colonial state interventions in the Lower Ganges basin waterscapes. The second case study zooms the focus on the 2 km long Farakka Barrage. These explorations reveal how an ‘imported’ conceptual land-water divide infused those interventions, leading to unforeseen effects on riverine lives and livelihoods. Focusing on Hamidpur char, situated few kilometres upstream of the barrage, the third case study recounts the contemporary efforts of local communities to obtain revision of administrative decisions unable to deal with ‘muddyscapes’. Finally, the paper engages with recent debates on the concept of hybridity in land-water nexus to reflect on the specific meaning and role of sediments.

scholarly journals Air pollution over the Ganges basin and northwest Bay of Bengal in the early postmonsoon season based on NASA MERRAero data

2014 ◽  
Vol 119 (3) ◽  
pp. 1555-1570 ◽  
Author(s):  
Pavel Kishcha ◽  
Arlindo M. da Silva ◽  
Boris Starobinets ◽  
Pinhas Alpert
Keyword(s):  
Air Pollution ◽  
Bay Of Bengal ◽  
Ganges Basin ◽  
The Ganges

LISEM: A Physically-Based Hydrologic and Soil Erosion Catchment Model

1998 ◽  
pp. 429-440 ◽  
Author(s):  
Ad de Roo ◽  
Victor Jetten ◽  
Cees Wesseling ◽  
Coen Ritsema
Keyword(s):  
Soil Erosion ◽  
Physically Based ◽  
Catchment Model
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