Abnormal increase of Mn and TP concentrations in a temperate reservoir during fall overturn due to drought-induced drawdown

Qiu, Xiaopeng; Zeng, Mingzheng; Shi, Jianghong; Cao, Zhanhui; Zhou, Shilei

doi:10.1016/j.scitotenv.2016.09.170

Cited by 7 publications

(2 citation statements)

References 37 publications

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“…35, e17 decreased water transparency due to sediment becoming more susceptible to wind action (Luettich Junior et al, 1990;Jalil et al, 2019;Tang et al, 2020), to the increasing pollutant and nutrient concentrations due to reduced water volume, which favors eutrophication and cyanobacteria dominance. In reservoirs, severe droughts have an accentuated impact due to the increased water residence time, making them ideal environments for these blooms (Qiu et al, 2017;Rocha Junior et al, 2018;Nobre et al, 2020;Santos et al, 2021;Cortez et al, 2022). A study conducted in a semi-arid region indicates that reservoirs in the same region under the same drought period had different behavior regarding the dominance of cyanobacteria.…”

Section: Discussionmentioning

confidence: 99%

Impacts of extreme precipitation events in water quality: a scientometric analysis in global scale

2023

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Aim This study aims to evaluate temporal patterns of extreme events related to precipitation on a global scale, identifying their main impacts and if there are climatic zones more susceptible to these phenomena using a scientometric approach. Methods A systematic review was conducted on scientific papers published between 1991 and July 2020, obtained from the Scopus and Thomson ISI Web of Science databases. Keywords related to precipitation extreme events and their effects on planktonic communities and freshwater ecosystems' water quality were used in the search. Results The analysis revealed a significant increase in publications, particularly from 2014 onwards, following the release of reports by the Intergovernmental Panel on Climate Change (IPCC) and the American Meteorological Society (AMS). These reports highlighted the increasing frequency of these climatic events and their potential for causing damage to humanity. In this review, we focused on extreme weather events related to precipitation such as droughts, rains, and floods. These events, due to their sudden volumetric changes, lead to immediate physical and chemical alterations in the water column. The main impacts of these extreme events on aquatic ecosystems include increased nutrient concentrations (mainly phosphorus and nitrogen), contamination by micropollutants, cyanobacteria blooms, and loss of biodiversity. Conclusions The scientometric analysis indicates that extreme weather events associated with precipitation have a detrimental effect on water quality and aquatic biodiversity, exacerbating the eutrophication process in freshwater systems.

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Section: Discussionmentioning

confidence: 99%

Impacts of extreme precipitation events in water quality: a scientometric analysis in global scale

2023

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“…Even with its oligotrophic/mesotrophic status, Kouris Reservoir experiences eutrophication events and CB growth. After the onset of thermal stratification, the conditions in the hypolimnion gradually become anaerobic, providing the chemically reducing environment for the phosphorus to be released from the sediment back into the water column, thereby enhancing the growth of microbial communities (Qiu et al 2017). Hypolimnion aeration or oxygenation, and sediment and/or water treatment with aluminium sulphate, are common strategies used to combat phosphorus releases from the lake bottom sediments (Beutel et al 2008).…”

Section: Discussionmentioning

confidence: 99%

Nutrient and heavy metal storage and mobility within sediments in Kouris Reservoir, Cyprus

2017

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The objective of this study was to evaluate the risks associated with nutrient and heavy metal pollution in the water and sediments of Kouris Reservoir in Cyprus, and to recommend applicable measures to alleviate them. The reservoir drainage area contains various historic abandoned copper mines existing in an ophiolite geological substrate. Kouris Reservoir water is classified as oligotrophic to mesotrophic, with phosphorus being the limiting factor for algae growth. The thermal stratification of the reservoir enhances anoxic conditions in the reservoir hypolimnion, initiating phosphorus release back into the water column from the lake bottom sediments. The increased phosphorus release, in combination with increased water temperatures during the summer months (i.e. reaching 27°C in August), may be the key factors enhancing the growth of microbial communities and cyanobacteria blooms. The sediment of Kouris Reservoir is classified as 'low risk' on the basis of the Ecological Risk Index scheme, in contrast to the Geoaccumulation Index, which indicates a moderate degree of contamination for chromium (Cr), nickel (Ni) and copper (Cu), and a high degree for lead (Pb). Heavy metals are strongly bound to the sediment matrix at pH values between 7 and 9, but can be released back into the water column at potential acid pH values. In addition, the sediments exhibit a high copper and chromium absorption affinity under current water quality conditions in the reservoir, as shown by batch absorption experiments. The experimental results suggest dredging of the reservoir sediment, and its subsequent dumping of the sediments near influent streams, would have adverse effects on the environment in the event of acid rain or other environmental changes that might acidify the sediment.

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Modeling, challenges, and strategies for understanding impacts of climate extremes (droughts and floods) on water quality in Asia: A review

Fabian

Kwon

Vithanage

et al. 2023

Environmental Research

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Abnormal increase of Mn and TP concentrations in a temperate reservoir during fall overturn due to drought-induced drawdown

Cited by 7 publications

References 37 publications

Impacts of extreme precipitation events in water quality: a scientometric analysis in global scale

Impacts of extreme precipitation events in water quality: a scientometric analysis in global scale

Nutrient and heavy metal storage and mobility within sediments in Kouris Reservoir, Cyprus

Modeling, challenges, and strategies for understanding impacts of climate extremes (droughts and floods) on water quality in Asia: A review

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