Coupled hydrodynamic and water quality modeling in the coastal waters off Chennai, East Coast of India

Pradhan, Umakanta; Panda, Uma Sankar; Naik, Subhas V.; Mishra, Pravakar; Kumar, Dinesh; Begum, Mehmuna; Murthy, M. V. Raman

doi:10.3389/fmars.2022.987067

Cited by 5 publications

(1 citation statement)

References 40 publications

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“…Two-dimensional and three-dimensional models take into account the flow velocity of the water and have high computational efficiency and simulation accuracy [12]. These models have significant advantages in terms of their ability to reflect the mutual transformation and influence between the quantity and quality of regional rivers, and they have been widely used in the research on the water quality and quantity in reservoirs, lakes, and basins [13].…”

Section: Introductionmentioning

confidence: 99%

Simulation Study on the Impact of Water Flow Regulation Based on the MIKE 21 Model in a River Water Environment

Xu,

Ren,

Huang

et al. 2023

Sustainability

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Inadequate hydrodynamics can cause deterioration of the water environment within rivers. Regulating water conservancy projects can effectively improve the state of the water environment of rivers and promote sustainable regional development. The river plain in Zhejiang Province, China, suffers from severe hydrodynamic deficiencies, which have a significant impact on the state of the regional water environment. To investigate the changing state of the water environment of the river plain under water conservancy project control, in this study we constructed a two-dimensional hydrodynamic–water quality model based on the AD and ECOLAB modules in MIKE 21 software 2014 Edition. Combined with conservative tracers, the changes in the water displacement rate, flow rate, and water environment quality of the river plain were simulated under different regulation schemes over 7 days. A quantitative analysis of the effects of improving the state of the water environment in the river plain was carried out using a cluster analysis and a cloud model. (1) The water replacement rate of the outer river reached 90% after 3 days and approached 100% after 7 days. The water replacement rates of the inner pond were 51.2, 49.6, and 55.8%. This indicated that the engineering control measures effectively improved the replacement capacity of the river. (2) The contents of DO and BOD5 in the river have increased from class V to above class 3. The overall water quality is in the range of classes 2 to 3, and in some parts it can reach class 1. This indicates that the regulatory plan played a certain role in improving the river water environment. (3) The water pollution in the study area showed a fluctuating and decreasing trend over 7 days. There was a positive correlation between the flow velocity, water replacement rate, DO, and BOD5.

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Section: Introductionmentioning

confidence: 99%

Simulation Study on the Impact of Water Flow Regulation Based on the MIKE 21 Model in a River Water Environment

Xu,

Ren,

Huang

et al. 2023

Sustainability

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Sediment distribution and transport pattern in the nearshore region, southeast coast of India

Pradhan,

Naik,

Mishra

et al. 2024

Anthropocene Coasts

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The present paper aimed to assess the sediment distribution pattern, mode of transport, and its interaction with hydrodynamic and topographic conditions at different depths and regions along the east coast of India. About 900 surficial sediment samples were collected and analysed on a monthly basis for the Chennai coastal region at 32 stations from 2013 to 2015. The study region is classified into four types, such as beach, inlet, 5 m, and 10 m depth. Sediment textural and grain size trend analyses were conducted to achieve the objectives. Sediment characteristics for the region were recorded as sandy, equally dominated by unimodal and bimodal at the beach, while unimodal at shallow depths (5 and 15 m). The sediments were medium sand to coarse sand at the beach, mostly fine followed by medium at 5 and 15 m depths. The sediment sorting is dominated by moderately well-sorted sediments; the skewness of beach sediments was negative, while nearshore sediments were found positive; average kurtosis values of sediments were noticed to be mesokurtic. The CM plot depicts that the sediments were mostly derived by tractive current, and the modes of transport are “bottom suspension and rolling” and “graded suspension no rolling” at beach locations and shallow water depths, respectively. The GSTA analysis reveals the annual average sediment transport pattern is northerly. The numerical hydrodynamic study confirms the GSTA and CM plot analysis. The study reveals a stable sedimentary environment south of the Chennai port and instability in the northern part. The study includes large spatiotemporal nearshore sediment data with hydrodynamic conditions, immensely helpful to coastal stakeholders and researchers.

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Statistical analysis of water quality and cyclone impacts along the south Odisha coast, east coast of India

Kar,

Mohanty,

Swain

et al. 2025

Regional Studies in Marine Science

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Coupled hydrodynamic and water quality modeling in the coastal waters off Chennai, East Coast of India

Cited by 5 publications

References 40 publications

Simulation Study on the Impact of Water Flow Regulation Based on the MIKE 21 Model in a River Water Environment

Simulation Study on the Impact of Water Flow Regulation Based on the MIKE 21 Model in a River Water Environment

Sediment distribution and transport pattern in the nearshore region, southeast coast of India

Statistical analysis of water quality and cyclone impacts along the south Odisha coast, east coast of India

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