Waste Assimilative Capacity of Coastal Waters along Mumbai Mega City, West Coast of India Using MIKE‐21 and WASP Simulation Models

VishnuRadhan, Renjith; Vethamony, P.; Zainudin, Zaki; Kumar, Krishnakumar Vinod

doi:10.1002/clen.201200549

Cited by 18 publications

(9 citation statements)

References 54 publications

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“…Presently, the west coast receives untreated wastewater/sewage from drains and treated effluent from preliminary (Malad), primary (Worli and Bandra) and secondary (Versova) levels of wastewater treatment facilities (WWTFs) (Vijay et al 2011b(Vijay et al , 2015. These discharges deteriorate the quality of coastal water though it has huge dilution and assimilation capacity (Liu et al 2007; Kamble and Vijay 2011;Vishnuradhan et al 2014). Sewage contains organic matter and faecal coliform (FC) which experiences bacterial decomposition that reduces dissolved oxygen (DO) and increases biochemical oxygen demand (BOD) in the water.…”

Section: Introductionmentioning

confidence: 98%

Impact of sewage discharges on coastal water quality of Mumbai, India: present and future scenarios

Vijay

Mardikar

Kumar

2016

Environ Monit Assess

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The simulation study assesses the impact of sewage discharges on the present and predicted water quality of the Mumbai coast using MIKE 21. Water quality parameters in terms of dissolved oxygen (DO), biochemical oxygen demand (BOD) and faecal coliform (FC) are checked against specified standards. The simulation is validated for the present coastal hydrodynamics and observed water quality parameters. The validated model is further used for predicting scenarios in terms of upgradation in a pumping station and improvement in wastewater collection, treatment level and disposal systems. The water quality of the existing coastal environment does not conform to the stipulated standards but improves considerably in the prediction scenarios. However, despite a marked improvement in FC, it is not as per desired standards as no treatment for bacteria removal is considered. The simulation study emphasizes the need for exploring options like the reuse or recycle of treated effluent, as an effort for water conservation.

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Section: Introductionmentioning

confidence: 98%

Impact of sewage discharges on coastal water quality of Mumbai, India: present and future scenarios

Vijay

Mardikar

Kumar

2016

Environ Monit Assess

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“…The water quality analysis and simulation programme (WASP) model can interpret and predict water quality cases in response to natural as well as man-made pollutions of diverse environments [25]. As a validated and flexible water quality model, WASP is widely used in assimilative capacity assessment [25,26].…”

Section: Wasp Model For Assimilative Capacitymentioning

confidence: 99%

“…As a validated and flexible water quality model, WASP is widely used in assimilative capacity assessment [25,26]. The WASP model is composed of two modules, the DYNHYD and the WASP.…”

Section: Wasp Model For Assimilative Capacitymentioning

confidence: 99%

Application of WASP model and Gini coefficient in total mass control of water pollutants: a case study in Xicheng Canal, China

Wang

Yang

et al. 2016

Desalination and Water Treatment

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A B S T R A C TThe main objective of this study was to apply the water quality analysis simulation programme to develop total mass control of pollutant (TMCP) programmes by calculating the water assimilative capacities for chemical oxygen demand (COD) and ammonia nitrogen (NH 3 -N) of a river that connects the Taihu Lake and the Yangtze River. Based on the distribution of water assimilative capacities, the geographical distribution of the pollutant permitted discharge load was validated by calculating the Gini coefficients for the economic, social and environmental efficiencies. According to the validation results, pollutant permitted discharge load was reallocated between townships and the rates of the reductions in pollutants for each township in the watershed were calculated. The water assimilative capacities of COD and NH 3 -N of Xicheng Canal watershed were calculated as 4803 ton/yr and 186 ton/yr, respectively. The results for the reallocation of pollutant permitted discharge load between townships indicated that the reduction in COD was small, with only 11.2% reduction for Qingyang Town and 33.6% for Chengjiang Town. In contrast, the NH 3 -N reductions of Yuecheng Town, Nanzha Town, Qingyang Town and Chengjiang Town were 52.9, 40.0, 61.4 and 54.5%, respectively, while the total reduction for Xicheng Canal watershed reached 53.5%. Based on the case, a new TMCP framework for allocating the pollutant permitted discharge loads in rivers was established, which not only combined the total mass of pollutant with the water quality but also took account for equity and efficiency in the allocation of pollutant permitted discharge loads.

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“…The natural ability of a water body to withstand or assimilate certain amount of pollutants is termed as the waste assimilative capacity (WAC)/assimilative capacity/carrying capacity/self-purification capacity. [14][15][16][17] The dissolved oxygen (DO) is a crucial water quality parameter essential for the survival of aquatic organisms and health of the ecosystem. [18] The oxygen saturation in the estuarine water is affected by temperature, salinity and tidal action.…”

Section: Introductionmentioning

confidence: 99%

Southwest monsoon influences the water quality and waste assimilative capacity in the Mandovi estuary (Goa state, India)

VishnuRadhan

Sagayadoss

Seelan

et al. 2015

Chemistry and Ecology

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The monsoon-dominated Mandovi estuary is located in Goa state -a global tourist destination along the centralwest coast of India. In addition to factor analyses of water quality data, the water quality index (WQI), trophic state index (TSI) and percentage of freshwater volume in the estuary are calculated in order to infer the general waste assimilative capacity and prevailing water quality conditions. Factor analysis showed a dominance of PO 4 -P, NO 2 -N, NH 3 -N, total suspended solids (TSS) and turbidity during southwest (SW) monsoon relative to other seasons. The WQI suggested that an increase in nutrients, turbidity and TSS during SW monsoon increase the WQI values beyond 2, rendering the water at some locations slightly polluted. During pre-monsoon, considerable increase in the WQI is observed at all the upstream stations rendering slightly polluted water at these stations. The TSI showed an average value of 46.95 during SW monsoon, 42.43 during post-monsoon and 48.42 during the pre-monsoon seasons, suggesting better productivity level during pre-monsoon, followed by SW monsoon, but the least during the post-monsoon. All the seasons, however, indicated a mesotrophic condition in the estuary and the assimilative capacity of the estuary is found to be in good to fairly good state (pre-monsoon < SW monsoon < post-monsoon).

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Waste Assimilative Capacity of Coastal Waters along Mumbai Mega City, West Coast of India Using MIKE‐21 and WASP Simulation Models

Cited by 18 publications

References 54 publications

Impact of sewage discharges on coastal water quality of Mumbai, India: present and future scenarios

Impact of sewage discharges on coastal water quality of Mumbai, India: present and future scenarios

Application of WASP model and Gini coefficient in total mass control of water pollutants: a case study in Xicheng Canal, China

Southwest monsoon influences the water quality and waste assimilative capacity in the Mandovi estuary (Goa state, India)

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