Climate and land-use change impact on faecal indicator bacteria in a temperate maritime catchment (the River Conwy, Wales)

Bussi, Gianbattista; Whitehead, Paul; Thomas, Amy; Masante, Dario; Jones, Laurence; Cosby, B. J.; Emmett, Bridget A.; Malham, Shelagh K.; Prudhomme, Christel; Prosser, Harvard

doi:10.1016/j.jhydrol.2017.08.011

Cited by 22 publications

(18 citation statements)

References 53 publications

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“…The model simulates a range of processes governing microbial transport, growth and die-off, and parameters may be varied at a sub-catchment scale to enable a spatially variable representation of key processes. A full description of the Total Coliform model and applications in England, Wales and Finland are given by Whitehead et al (2016), Bussi et al (2017), and Rankinen et al (2016).…”

Section: Water Quality In the River Systemmentioning

confidence: 99%

Restoring water quality in the polluted Turag-Tongi-Balu river system, Dhaka: Modelling nutrient and total coliform intervention strategies

Whitehead

Bussi

Hossain

et al. 2018

Science of The Total Environment

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River water quality in rapidly urbanising Asian cities threatens to damage the resource base on which human health, economic growth and poverty reduction all depend. Dhaka reflects the challenges and opportunities for balancing these dynamic and complex trade-offs which goals can be achieved through effective policy interventions. There is a serious problem of water pollution in central Dhaka, in the Turag-Tongi-Balu River system in Bangladesh with the river system being one of the most polluted in the world at the moment. A baseline survey of water chemistry and total coliforms has been undertaken and shows dissolved oxygen close to zero in the dry season, high organic loading together with extreme levels of Ammonium-N and total coliform in the water. Models have been applied to assess hydrochemical processes in the river and evaluate alternative strategies for policy and the management of the pollution issues. In particular models of flow, Nitrate-N, Ammonium-N and indicator bacteria (total coliforms) are applied to simulate water quality in the river system. Various scenarios are explored to clean up the river system, including flow augmentation and improved effluent treatment. The model results indicate that improved effluent treatment is likely to have a more significant impact on reducing Ammonium-N and total coliforms than flow augmentation, but a combined strategy would greatly reduce the pollution problems in the Turag-Tongi-Balu River System.

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Section: Water Quality In the River Systemmentioning

confidence: 99%

Restoring water quality in the polluted Turag-Tongi-Balu river system, Dhaka: Modelling nutrient and total coliform intervention strategies

Whitehead

Bussi

Hossain

et al. 2018

Science of The Total Environment

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“…It is a well-mixed, macro-tidal estuary with a tidal range of 4–6 m [ 19 ]. The estuary and nearshore coast is an important area for the cultivation of mussels [ 20 ] and a tourist region with several blue-flag bathing beaches. There are three main WWTPs, more than 15 smaller WWTPs, and 35 combined sewage outfalls that discharge into the river network [ 21 ]; all potential sources of bacterial contamination [ 22 ].…”

Section: Methodsmentioning

confidence: 99%

Impact of Sediment Concentration on the Survival of Wastewater-Derived blaCTX-M-15-Producing E. coli, and the Implications for Dispersal into Estuarine Waters

Bashawri

Robins

Cooper

et al. 2020

IJERPH

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The environmental cycling of antibiotic-resistant blaCTX-M-15-producing E. coli following release from wastewater treatment plants is a major public health concern. This study aimed to (i) assess the impact of sediment concentrations on the rate of their inactivation following release from human wastewater into freshwater, and (ii) simulate their subsequent dispersal to the nearby coastline during a “worst-case” event where heavy rainfall coincided with high spring tide in the Conwy Estuary, North Wales. Freshwater microcosms of low, medium and high turbidity were inoculated with blaCTX-M-15 -producing E. coli, then exposed to ultraviolet (UV) radiation. Typical regional wintertime exposure to UV was found to be insufficient to eradicate E. coli, and in highly turbid water, many bacteria survived simulated typical regional summertime UV exposure. Modelling results revealed that blaCTX-M-15-producing E. coli concentrations reduced downstream from the discharge source, with ~ 30% of the source concentration capable of dispersing through the estuary to the coast, taking ~36 h. Offshore, the concentration simulated at key shellfisheries and bathing water sites ranged from 1.4% to 10% of the upstream input, depending on the distance offshore and tidal regime, persisting in the water column for over a week. Our work indicates that the survival of such organisms post-release into freshwater is extended under typical wintertime conditions, which could ultimately have implications for human health.

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“…Fairweather et al [23] found high multivariate dispersion among downstream samples as well as overall sample dissimilarity that indicated higher heterogeneity downstream. Bussi et al [24] stated that climate change has no big impact on average river flow and land use change can have a large impact on pathogens.…”

Section: Possibility Of River Watersheed Contaminationmentioning

confidence: 99%

Reducing Escherichia Coli Contamination on Dringking Water Stations in Pasuruan, East Java, Indonesia.

Winarningsih¹

2019

IJAR

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Climate and land-use change impact on faecal indicator bacteria in a temperate maritime catchment (the River Conwy, Wales)

Abstract: use change impact on faecal indicator bacteria in a temperate maritime catchment (the River Conwy, Wales),

Cited by 22 publications

References 53 publications

Restoring water quality in the polluted Turag-Tongi-Balu river system, Dhaka: Modelling nutrient and total coliform intervention strategies

Restoring water quality in the polluted Turag-Tongi-Balu river system, Dhaka: Modelling nutrient and total coliform intervention strategies

Impact of Sediment Concentration on the Survival of Wastewater-Derived blaCTX-M-15-Producing E. coli, and the Implications for Dispersal into Estuarine Waters

Reducing Escherichia Coli Contamination on Dringking Water Stations in Pasuruan, East Java, Indonesia.

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