Analysing water quality changes due to reservoir management and climate change for optimization of drinking water treatment

Reservoir water for drinking water production may undergo major short-term and long-term quality changes. These are results of natural processes in the water body and of the water's quality entering and leaving the reservoir. Long term quality changes are due to management of catchment areas, but also to a considerable extent by external impacts like climate change. Short term quality changes are impacted by extreme events like rain storms after drought periods, which might also be a result of climate change. Furthermore, short- and mid-term quality changes are impacted by reservoir management, which also influences the ecological state of rivers downstream the reservoir. The purpose of our work is to develop a decision support tool for reservoir management which takes into account short-, mid- and long-term factors for water quality change. With the tool it is intended to simulate not only water quality, but also management impact on flood risk prevention and drinking water quality (treatment efficiency and costs) and to assist decision making for reservoir management.

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Integration of target analyses, non-target screening and effect-based monitoring to assess OMP related water quality changes in drinking water treatment

The Science of The Total Environment ◽

10.1016/j.scitotenv.2019.135779 ◽

2020 ◽

Vol 705 ◽

pp. 135779 ◽

Cited By ~ 7

Author(s):

Andrea M. Brunner ◽

Cheryl Bertelkamp ◽

Milou M.L. Dingemans ◽

Annemieke Kolkman ◽

Bas Wols ◽

...

Keyword(s):

Water Quality ◽

Drinking Water ◽

Water Treatment ◽

Drinking Water Treatment ◽

Quality Changes ◽

Target Screening

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Seasonal Water Quality and Algal Responses to Monsoon-Mediated Nutrient Enrichment, Flow Regime, Drought, and Flood in a Drinking Water Reservoir

International Journal of Environmental Research and Public Health ◽

10.3390/ijerph182010714 ◽

2021 ◽

Vol 18 (20) ◽

pp. 10714

Author(s):

Md Mamun ◽

Usman Atique ◽

Ji Yoon Kim ◽

Kwang-Guk An

Keyword(s):

Water Quality ◽

Drinking Water ◽

Flow Regime ◽

Nutrient Enrichment ◽

Water Reservoir ◽

Reservoir Water ◽

Chl A ◽

Drought And Flood ◽

Drinking Water Reservoir

Freshwater reservoirs are a crucial source of urban drinking water worldwide; thus, long-term evaluations of critical water quality determinants are essential. We conducted this study in a large drinking water reservoir for 11 years (2010–2020). The variabilities of ambient nutrients and total suspended solids (TSS) throughout the seasonal monsoon-mediated flow regime influenced algal chlorophyll (Chl-a) levels. The study determined the role of the monsoon-mediated flow regime on reservoir water chemistry. The reservoir conditions were mesotrophic to eutrophic based on nitrogen (N) and phosphorus (P) concentrations. An occasional total coliform bacteria (TCB) count of 16,000 MPN per 100 mL was recorded in the reservoir, presenting a significant risk of waterborne diseases among children. A Mann–Kendall test identified a consistent increase in water temperature, conductivity, and chemical oxygen demand (COD) over the study period, limiting a sustainable water supply. The drought and flood regime mediated by the monsoon resulted in large heterogeneities in Chl-a, TCB, TSS, and nutrients (N, P), indicating its role as a key regulator of the ecological functioning of the reservoir. The ambient N:P ratio is a reliable predictor of sestonic Chl-a productivity, and the reservoir was P-limited. Total phosphorus (TP) had a strong negative correlation (R2 = 0.59, p < 0.05) with the outflow from the dam, while both the TSS (R2 = 0.50) and Chl-a (R2 = 0.32, p < 0.05) had a strong positive correlation with the outflow. A seasonal trophic state index revealed oligo-mesotrophic conditions, indicating a limited risk of eutrophication and a positive outcome for long-term management. In conclusion, the Asian monsoon largely controlled the flood and drought conditions and manipulated the flow regime. Exceedingly intensive crop farming in the basin may lead to oligotrophic nutrient enrichment. Although the reservoir water quality was good, we strongly recommend stringent action to alleviate sewage, nutrient, and pollutant inflows to the reservoir.

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A decision support procedure for integrative management of dammed raw water reservoirs

Water Science & Technology Water Supply ◽

10.2166/ws.2013.032 ◽

2013 ◽

Vol 13 (2) ◽

pp. 349-357

Author(s):

I. Slavik ◽

W. Uhl ◽

B. Skibinski ◽

S. Rolinski ◽

T. Petzoldt ◽

...

Keyword(s):

Water Quality ◽

Drinking Water ◽

Decision Support ◽

Reservoir Management ◽

Process Models ◽

Raw Water ◽

Water Reservoirs ◽

Catchment Areas ◽

Raw Water Quality ◽

Integrative Management

Dammed drinking water reservoirs with their catchment areas and the downstream rivers are dynamic systems that change permanently under the influence of many factors. Their multifunctional use for drinking water supply, flood control, energy production, nature conservation and recreation as well as ecological constraints for the rivers downstream requires an integrative management considering and balancing between different requirements. Thus, an optimal reservoir management has to take into account scenarios of external influences and must be based on predictions of prospective raw water qualities. Furthermore, the impacts of short- and long-term changes of the raw water quality on drinking water treatment have to be considered. The problem is very complex and cannot be solved intuitively but requires the application of hydrological, ecological and process models. This approach was followed in the work presented here, as a tool to predict and evaluate the impacts of different reservoir management strategies in an integrative way is currently not available. The developed decision support procedure (DSP) allows for the estimation of the effects of different hydrological and water quantity management scenarios on raw water quality, water processing costs and ecology in the downstream river. Extreme hydrological events or changing boundary conditions (e.g. climate change) are taken into account.

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Current and Long-Term Effects of Delta Water Quality on Drinking Water Treatment Costs from Disinfection Byproduct Formation

San Francisco Estuary and Watershed Science ◽

10.15447/sfews.2010v8iss3art4 ◽

2010 ◽

Vol 8 (3) ◽

Cited By ~ 7

Author(s):

Wei–Hsiang Chen ◽

◽

Kristine Haunschild ◽

Jay R. Lund ◽

William Fleenor ◽

...

Keyword(s):

Water Quality ◽

Drinking Water ◽

Water Treatment ◽

Drinking Water Treatment ◽

Treatment Costs ◽

Long Term Effects ◽

Disinfection Byproduct ◽

Byproduct Formation

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IntegTa: a procedure for integrative management of dammed raw water reservoirs for drinking water production and their lower reaches

Water Science & Technology Water Supply ◽

10.2166/ws.2010.186 ◽

2010 ◽

Vol 10 (5) ◽

pp. 783-792 ◽

Cited By ~ 1

Author(s):

I. Slavik ◽

W. Uhl ◽

J. Völker ◽

H. Lohr ◽

M. Funke ◽

...

Keyword(s):

Water Quality ◽

Drinking Water ◽

Flood Control ◽

Reservoir Management ◽

Water Production ◽

Raw Water ◽

Water Reservoirs ◽

Drinking Water Production ◽

The Impact

Dammed water reservoirs for drinking water production with their catchment areas and rivers downstream represent dynamic systems that change constantly and are subject to many influences. An optimized management considering and weighing up the various demands on raw water reservoirs (long-term storage for drinking water supply, flood control, ecological state of the rivers downstream, energy production, nature conservation and recreational uses) against each other is therefore very difficult. Thus, an optimal reservoir management has to take into account scenarios of possibly occurring external influences and to permit predictions of prospective raw water qualities, respectively. Furthermore, the impact of short and long term changes in raw water quality on subordinate processes should be considered. This approach was followed in the work presented here, as there currently is no tool available to predict and evaluate the impacts of raw water reservoir management strategies integratively. The strategy supported by the newly developed decision support procedure takes into account all aspects from water quality, flood control and drinking water treatment to environmental quality downstream the reservoir. Furthermore, possible extreme events or changes of boundary conditions (e.g. climate change) can be considered.

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Drinking water quality and protection of resources

International Review of Applied Sciences and Engineering ◽

10.1556/irase.1.2010.1-2.8 ◽

2010 ◽

Vol 1 (1-2) ◽

pp. 51-54

Author(s):

J. Fettig

Keyword(s):

Water Quality ◽

Drinking Water ◽

Water Resources ◽

River Water ◽

Spring Water ◽

Public Water Supply ◽

Legal Requirements ◽

Reservoir Water ◽

Water Lake ◽

Treatment Step

Abstract The structure of public water supply in Germany and the water resources used are briefly described. An overview over the legal requirements for drinking water is given, and the sources for contaminants are outlined. Then the multiple-barrier approach is discussed with respect to the resources groundwater and spring water, lake and reservoir water, and river water. Examples for treatment schemes are given and the principle of subsurface transport of river water as a first treatment step is described.

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Multivariate analysis of long term water quality changes of shallow Lake Balaton

SIL Proceedings 1922-2010 ◽

10.1080/03680770.2006.11903050 ◽

2006 ◽

Vol 29 (4) ◽

pp. 2051-2055 ◽

Cited By ~ 1

Author(s):

G. Kiss ◽

Gy. Dévai ◽

B. Tóthmérész ◽

A. Szabó

Keyword(s):

Water Quality ◽

Multivariate Analysis ◽

Shallow Lake ◽

Lake Balaton ◽

Quality Changes

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Oil pollution and fisheries

Philosophical Transactions of the Royal Society of London Series B Biological Sciences ◽

10.1098/rstb.1982.0050 ◽

1982 ◽

Vol 297 (1087) ◽

pp. 401-411 ◽

Cited By ~ 9

Keyword(s):

Water Quality ◽

Adverse Effects ◽

Oil Pollution ◽

Coastal Areas ◽

Short Term ◽

Fish Stocks ◽

Local Impacts ◽

Reduced Water ◽

Long Term Adverse Effects

The term ‘pollution’ is taken in its broadest sense and effects are recognized to be due to interference, tainting and toxicity. Each of these types of impact is discussed and assessed. It is concluded that no long-term adverse effects on fish stocks can be attributed to oil but that local impacts can be extremely damaging in the short term and that produce from specific localities can be tainted and unmarketable for long periods. In some coastal areas oil can be one among several contributors to reduced water quality, and the implications of this are discussed.

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