Ecological flow assessment using hydrological and hydrodynamic routing model in Bhogdoi river, India

Baruah, Anupal; Sarma, Arup Kr.

doi:10.1007/s40808-020-00982-9

Cited by 13 publications

(5 citation statements)

References 31 publications

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“…The numerical scheme adopted in the model is the MacCormak predictor–corrector scheme which is an explicit two‐step predictor–corrector scheme capable of capturing shocks. This scheme applies a backward finite difference scheme in the predictor part, followed by a forward difference scheme in the corrector part (Baruah & Sarma, 2021; Devi et al, 2019; Kalita, 2020). The parameters estimated in the predictor step were incorporated into the corrector step.…”

Section: Methodsmentioning

confidence: 99%

“…A total of more than 200 methodologies were applied in 44 countries. Tharme (2003) categorized those into four categories which include (a) holistic (Tare et al, 2017), (b) hydraulic (Baruah & Sarma, 2021; Książek et al, 2019; Stamou et al, 2018), (c) habitat simulation (Koutrakis et al, 2019; Leitner et al, 2017), and (d) hydrological (Richter et al, 1996; Tennant, 1976). Flow duration curves (FDC) are the most informative tools depicting the range of discharges from low to high flows (Smakhtin, 2001).…”

Section: Introductionmentioning

confidence: 99%

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Impact of interbasin transfer hydroelectric project on downstream aquatic habitat

Devi,

Sarma

2023

Ecohydrology

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The recent surge of anthropogenic activities like damming is causing a severe threat to the aquatic ecosystem. A scope of minimizing the degradation of biota exists by modifying the dam operation policy. This can be achieved by releasing a minimum environmental flow (EF), which further requires more scientific investigations. The present study investigated the impact of an interbasin transfer hydropower dam on the downstream habitat of an endangered fish species, Tor putitora, using an adaptive modelling framework. The framework consists of coupling a reservoir operation and a hydrodynamic model. This study analyses the scope of releasing different EFs from a hydropower dam to meet the environmental flow requirement (EFR) at downstream with satisfactory power production efficiency. The EFR was estimated using flow duration curve and Tennant's method. A lean period inflow hydrograph was incorporated into the model with a series of alternate EFs. Two scenarios were explored, with 4 and 6 h of peaking hours, along with the three cases of different initial reservoir storage. The total usable area over the river reach of the mentioned fish species was evaluated from the flow parameters simulated by the hydrodynamic component of the model. The power production efficiencies and area utilization rates were assessed in all these cases to prepare an easy‐to‐use decision support tool in a tabular form depicting the possible states of EF. The generalized methodology adopted in this analysis will help the decision‐makers quantify EF to be released from the dam within an acceptable power generation efficiency.

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Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Impact of interbasin transfer hydroelectric project on downstream aquatic habitat

Devi,

Sarma

2023

Ecohydrology

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“…The habitat suitability of any aquatic species is expressed in terms of habitat suitability indices (HSIs) or habitat suitability curves (HSCs) (Baruah & Sarma, 2021). These parameters are generated from the physical flow parameters indicating the favourable condition for target species at different life stages.…”

Section: Introductionmentioning

confidence: 99%

Habitat response of adult fish species under the influence of ecological flow and hydrodynamic regime in perennial river system

et al. 2022

Self Cite

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The escalating anthropogenic activities in recent decades are constantly affecting the aquatic ecology and posing a threat to freshwater species. In this study, a two‐dimensional ecohydraulic model and multiple criteria decision analysis (MCDA) coupled framework is employed in the Dikhow River, India, to investigate the favourable habitat condition for the nearly threatened Notopterus chitala fish locally known as Chital fish. The habitat residence suitability and habitat suitability indices are calculated at the observed and ecological flows. The ecological flow rates are computed from flow duration curve shifting and flow duration curve analysis methods. The hydrodynamic computations are carried out using a 1D‐2D coupled MIKE FLOOD model. The habitat assessment of the targeted species is carried out by constructing the suitability curves from the computed hydraulic parameters at different environmental management conditions. Results from the habitat assessment curves indicate that the maximum habitat suitability index is found for the targeted fish species at average annual flow. Based on the MCDA analysis, the outer banks of the meander zones are identified as not suitable residence regions for the target species. This study revealed that the coupled approach could be useful to regulate the stream restoration strategies and identify potential habitat preference locations in the domain.

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“…In this regard, selecting the adequate ecosystem conservation criteria 20 – 22 in allocating e-flows 23 , 24 is one of the most important challenges in estimating the appropriate e-flow for a basin in ecohydrological methods 25 . Thus, hydraulic methods 26 have been employed in some studies to determine the class of hydrological environmental management and e-flow allocation 27 , 28 . Other studies emphasize methods based on water quality 29 , 30 while considering the importance of the spatial changes of qualitative and hydrological parameters in the performance of e-flow in the restoration of river ecosystems 31 .…”

Section: Introductionmentioning

confidence: 99%

New integrated hydrologic approach for the assessment of rivers environmental flows into the Urmia Lake

Mobadersani

Dalir

Yasi

et al. 2022

Sci Rep

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Recent research has greatly focused on the environmental water supplement of rivers individually and independently. However, a comprehensive and integrated view of all rivers in the basin is simultaneously required in closed basins leading to lakes and wetlands. This has affected Lake Urmia, which is the second largest saltwater lake in the world. It has been in danger of drying up in recent years as a result of not allocating the required environmental flow (e-flow) due to the increase in water resource consumption in the agricultural sector and climate changes. In this study, a method derived from the flow duration curve shifting (FDCS) method is presented in addition to explaining the possibility of providing the e-flow of rivers leading to the lake. The method can make the least amount of change in the hydrological characteristics of rivers while providing the volume of required water by the ecosystem of lakes or downstream wetlands. Unlike the conventional method which presents the results on a monthly basis, the above-mentioned method is based on daily data of hydrometric stations and can calculate the amount of the environmental requirement of rivers in real-time according to the upstream inlet of the river. This method has been used in the Urmia Lake basin. According to the results, it can provide the environmental requirement of the lake by allocating 70.5% of the annual flow of rivers and thus can save the lake and the ecosystem of the region from the current critical conditions.

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Ecological flow assessment using hydrological and hydrodynamic routing model in Bhogdoi river, India

Cited by 13 publications

References 31 publications

Impact of interbasin transfer hydroelectric project on downstream aquatic habitat

Impact of interbasin transfer hydroelectric project on downstream aquatic habitat

Habitat response of adult fish species under the influence of ecological flow and hydrodynamic regime in perennial river system

New integrated hydrologic approach for the assessment of rivers environmental flows into the Urmia Lake

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