WATER QUALITY CHARACTERISTICS OF ICE-COVERED, STAGNANT, EUTROPHIC WATER BODIES AS INFLUENCED BY CLIMATE CHANGE

AbstractThe Water Framework Directive (2000/60/EC) establishes a framework for integrated water management and functions as a major legal frame for the protection of water bodies in Europe. In the Flemish Region the Directive has been implemented by the Decree of 18 July 2003 on Integral Water Policy. As climate change affects the quality and quantity status of water bodies, the question arises whether the Water Framework Directive (WFD) and the Flemish implementation legislation are well-suited to handle climate change impacts. Although climate change concerns are not explicitly incorporated in the text of the WFD and the Flemish Decree, this author believes that the main components for an effective adaptation strategy are included in the above mentioned legislation. More in particular, this is achieved by the environmental objectives which have to be elaborated in environmental quality standards (EQS) on the one hand, and the integrated approach on the other hand. Water quality management on the basis of a high level of protection of the aquatic environment is indispensable for adapting to climate change, as ecosystem-based adaptation is most cost-effective. Therefore spatial planning should integrate water quality concerns, as spatial planning may be critical for spatial quality and more specific for the achievement of the environmental objectives. Consequently this contribution focuses on the impact of water quality standards on permit decision-making and spatial planning. In this context some legal instruments anchored in the Flemish legislation on integral water policy will be highlighted, especially the 'watertoets' (translated as the water checkup), which may be useful to facilitate adaptation to climate change.

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Exploring How Cyanobacterial Traits Affect Nutrient Loading Thresholds in Shallow Lakes: A Modelling Approach

Water ◽

10.3390/w12092467 ◽

2020 ◽

Vol 12 (9) ◽

pp. 2467 ◽

Cited By ~ 1

Author(s):

Manqi Chang ◽

Sven Teurlincx ◽

Jan Janse ◽

Hans Paerl ◽

Wolf Mooij ◽

...

Keyword(s):

Water Quality ◽

Nitrogen Fixation ◽

Shallow Lakes ◽

Lake Restoration ◽

Nutrient Loading ◽

Ecosystem Model ◽

Water Bodies ◽

Cyanobacterial Blooms ◽

Eutrophic Water ◽

Modelling Approach

Globally, many shallow lakes have shifted from a clear macrophyte-dominated state to a turbid phytoplankton-dominated state due to eutrophication. Such shifts are often accompanied by toxic cyanobacterial blooms, with specialized traits including buoyancy regulation and nitrogen fixation. Previous work has focused on how these traits contribute to cyanobacterial competitiveness. Yet, little is known on how these traits affect the value of nutrient loading thresholds of shallow lakes. These thresholds are defined as the nutrient loading at which lakes shift water quality state. Here, we used a modelling approach to estimate the effects of traits on nutrient loading thresholds. We incorporated cyanobacterial traits in the process-based ecosystem model PCLake+, known for its ability to determine nutrient loading thresholds. Four scenarios were simulated, including cyanobacteria without traits, with buoyancy regulation, with nitrogen fixation, and with both traits. Nutrient loading thresholds were obtained under N-limited, P-limited, and colimited conditions. Results show that cyanobacterial traits can impede lake restoration actions aimed at removing cyanobacterial blooms via nutrient loading reduction. However, these traits hardly affect the nutrient loading thresholds for clear lakes experiencing eutrophication. Our results provide references for nutrient loading thresholds and draw attention to cyanobacterial traits during the remediation of eutrophic water bodies.

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Biomanipulation and its feasibility for water quality management in shallow eutrophic water bodies in The Netherlands

Hydrobiological Bulletin ◽

10.1007/bf02291160 ◽

1986 ◽

Vol 20 (1-2) ◽

pp. 165-172 ◽

Cited By ~ 24

Author(s):

A. F. Richter

Keyword(s):

Water Quality ◽

Quality Management ◽

The Netherlands ◽

Water Quality Management ◽

Water Bodies ◽

Eutrophic Water

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Quality Characteristics of Ground Waters in Few Sources of Industrial Zone

International Journal of Innovative Technology and Exploring Engineering - Special Issue ◽

10.35940/ijitee.c8178.019320 ◽

2020 ◽

Vol 9 (3) ◽

pp. 1134-1137

Keyword(s):

Water Quality ◽

Ground Water ◽

Public Awareness ◽

Industrial Effluents ◽

Quality Characteristics ◽

Water Bodies ◽

Subsurface Water ◽

Polluted Water ◽

Total Hardness ◽

Rapid Industrialization

The Population growths along with rapid industrialization and strain on civic services have been major causes for environmental degradation globally, especially many of surface and subsurface water bodies gets polluted by rapid industrialization and urbanization, usage of chemical fertilizers in agriculture practices, untreated sewage, industrial effluents, etc., and in addition of lack of public awareness may all cause damage to the quality characteristics i.e. physio-chemical changes in water environs. The ground water quality deteriorating due to seepage of pollutants from various polluted water bodies, like ponds, lakes and runoff, etc. Here an attempt is made to know the quality characteristics in the ground water at Auto Nagar area of Guntur by the Water Quality Index (WQI) with the parameters of pH, Chlorides, TDS, Total Hardness, Ca Hardness, Nitrates, Sulphates, Iron, Dissolved Oxygen and it was found that quality ranges of WQI from 37 to 90, which is a satisfactory quality for domestic utilization of ground water resources

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Risk Assessment of Climate Change Impacts on Urban Discharge Fraction and Eutrophication in Large European River Networks

10.5194/egusphere-egu21-5568 ◽

2021 ◽

Author(s):

Soohyun Yang ◽

Olaf Büttner ◽

Rohini Kumar ◽

Stefano Basso ◽

Dietrich Borchardt

Keyword(s):

Climate Change ◽

Water Quality ◽

River Water ◽

Climate Change Impacts ◽

River Basins ◽

Water Bodies ◽

River Networks ◽

Urban Emissions ◽

Hydrological Regimes ◽

The Eu

Climate change impacts on natural environments and human-built landscapes have been extensively studied from the meteorological, hydrological, agricultural, and urban point of views. Embracing the inevitability of climate change, there is a need for investigating and establishing adaptation strategies to changing climate conditions in order to protect essential resources for the survival of humans and ecosystems. Especially for surface water resources, water quality in rivers is a sensitive aspect which might be affected by the impact of climate change on hydrological regimes along river networks.In fact, with a grand target of achieving Good-Ecological-Status for all European surface water bodies, the implementation of the EU Water Framework Directive since year 2000 has facilitated remarkable reductions of point-source nutrient loads discharged from municipal wastewater treatment plants (WWTPs) into rivers. Nevertheless, satisfying the environmental regulations at the emission-pipe-end of individual WWTPs has not guaranteed a perfect resolution of river water quality problems (e.g., eutrophication) at the scale of entire river basins. This likely occurred because decisions concerning WWTPs size and location were mainly influenced by the scale and location of residential areas and driven by efficiency purposes. That is, the hydrological, biogeochemical, and ecological characteristics of river water bodies receiving the WWTPs emissions were less likely to be considered. Climate-change-driven shifts of hydrological regimes in rivers could exacerbate the current situation and accelerate the water quality degradation caused by the urban emissions.To tackle this issue, this study aims to decipher the interplays between WWTPs discharges and hydrological regimes of the receiving river water bodies, and to assess water quality risks due to WWTPs emissions under climate-change-induced alteration of hydrologic regimes, by using systematic and general tools at the scale of entire river networks (e.g., combined dimensions of stream-orders and WWTP-sizes). To this end, we synthesize the EU-scale reliable dataset for river networks and WWTPs and the simulation results of the mesoscale hydrologic model under a climate change scenario. We focus on nutrient concentrations (NH4-N, total P) and urban discharge fraction from WWTPs (i.e., the fraction of treated wastewater in river flows), performing the risk assessments for three large European river basins. Our diagnostic results at the river-network-scale could assist river basin managers and stakeholders to select WWTPs to be preferentially managed for minimizing water quality risks in the future under climate change. The presented concept here for the specific components is generally applicable to assess environmental risks and guide strategic management options for other pollutants in urban emissions (e.g., microplastics and pharmaceuticals).

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Assessing the impact of climate change on water quality and quantity in the Elbe catchment using an open-data driven approach

10.5194/egusphere-egu2020-6670 ◽

2020 ◽

Author(s):

Alexander Wachholz ◽

Seifeddine Jomaa ◽

Olaf Büttner ◽

Robert Reinecke ◽

Michael Rode ◽

...

Keyword(s):

Climate Change ◽

Water Quality ◽

Surface Water ◽

Weather Conditions ◽

Extreme Weather ◽

Water Bodies ◽

Chemical Status ◽

The Past ◽

Surface Water Bodies ◽

The Impact

Due to global climate change, the past decade has been the warmest for Germany since the beginning of climate records. Not only air temperature but also precipitation patterns are changing and therefore influencing the hydrologic cycle. This will certainly influence the chemical status of ground- and surface water bodies as mobilization, dilution and chemical reactions of contaminants are altered. However, it is uncertain if those alterations will impact water quality for better or worse and how they occur spatially. Since water management in Europe is handled at the regional scale, we suggest that an investigation is needed at the same scale to capture and quantify the different responses of the chemical status of water bodies to climate change and extreme weather conditions. In this study, we use open-access data to (1) quantify changes in temperature, precipitation, streamflow and groundwater levels for the past 40 - 60 years and (2) assess their impacts on nutrient concentrations in surface- and groundwater bodies. To disentangle management from climate effects we pay special attention to extreme weather conditions in the past decade. Referring to the Water Framework Directive, we chose the river basin district Elbe as our area of interest. Preliminary results indicate that especially the nitrate concentrations in surface water bodies of the Elbe catchment were positively affected in the last two years, while no significant impact on nitrate levels in shallow groundwater bodies was witnessed. However, many wells showed the first significant increase in water table depth in both years since 1985, raising the question of how fast groundwater-surface water interactions will change in the next years.

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Climate Change Impacts on Water Quality of Water Bodies-A Review

International Journal of Environment and Climate Change ◽

10.9734/ijecc/2020/v10i330185 ◽

2020 ◽

pp. 26-37

Author(s):

Eliud Salila ◽

Mahendra Pal Sharma ◽

Rajesh Singh

Keyword(s):

Climate Change ◽

Water Quality ◽

Climate Change Impacts ◽

Quality Parameters ◽

Water Bodies ◽

Preparedness Plan ◽

Quality Of Water ◽

Impacts Of Climate Change

The impacts of climate change on water quality of water bodies are associated with the climatic extreme events (heavy rainfall and flood, heat, drought, wildfires, cyclones, hurricane, super storms) as the major drivers that require knowledge of understanding. Most research studies present the role of climate change in threatening water quality, risks on drinking water and contributions of catchment in water pollution, but less attention has directed to specific sensitive water quality parameters, appropriate methodologies, risks on ecosystem and managerial practice to reduce the impacts. This review highlight the of effect climate change on surface water bodies based on recent literatures on the impacts of climate change on water quality and promote practical opportunity for better management of these impacts. We conclude that consideration of climate change preparedness plan in catchments is the best option to adopt for minimization of climate change impacts on water quality of water bodies.

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Effect of Integrating LED Lighting With Fiber Membranes On The Restoration of Eutrophic Waterbody And Its Optimal Application

10.21203/rs.3.rs-793453/v1 ◽

2021 ◽

Author(s):

Aimin Hao ◽

Qi Mi ◽

Kai He ◽

Dong Xia ◽

Bingjun Liu ◽

...

Keyword(s):

Water Quality ◽

Light Source ◽

Water Bodies ◽

Light Sources ◽

Led Light ◽

Eutrophic Water ◽

Red Led ◽

Fiber Membranes ◽

Do Concentration ◽

Study Laboratory

Abstract In this study, laboratory experiments were used to compare the effects of two LED light sources (blue and red) combined with fiber membranes on the increase of Dissolved Oxygen (DO) in eutrophic water bodies for improvement of water quality. The results showed that the application of these two LED light sources can increase the DO concentration and oxidation-reduction potential (ORP), and eliminate the NH4+-N in water bodies and the phosphorus release from the sediment, resulting in the improvement of sediment. Specifically, the blue LED light source is more benefitable to the increase of the DO concentration than the red LED light source. After 28 days, the DO concentration increases to 10 mg/L, and the redox potential is higher than 50 mV with the elimination of NH4+-N. This study illustrated that LED light sources can significantly increase the DO and effectively improve the water quality in eutrophic water bodies.

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