Management strategies for a eutrophic water supply reservoir - San Roque, Argentina

2003 ◽  
Vol 47 (7-8) ◽  
pp. 149-155 ◽  
Author(s):  
J.P. Antenucci ◽  
R. Alexander ◽  
J.R. Romero ◽  
J. Imberger
Keyword(s):  
Water Quality ◽  
Water Supply ◽  
Management Strategies ◽  
Vertical Mixing ◽  
Nutrient Release ◽  
Surface Mixed Layer ◽  
Bubble Plume ◽  
Quality Model ◽  
Eutrophic Water ◽  
Water Supply Reservoir

Possible management strategies to improve water quality in a eutrophic water supply reservoir in Argentina were evaluated using the one-dimensional coupled hydrodynamics and water quality model DYRESM-CAEDYM. The model was used to determine the effects of several different artificial destratification system designs (including both bubble plume diffusers and surface impellers with draft tubes, both separately and in combination), on the biomass of the potentially toxic cyanobacteria Microcystis aeruginosa. The best results were found by using a combination of a deep and shallow diffuser, to break down the seasonal thermocline and therefore limit sediment nutrient release and anoxia, and to enhance vertical mixing in the surface mixed layer, respectively.

Effect of different water management strategies on water and contaminant fluxes in Doncaster,United Kingdom

2005 ◽  
Vol 52 (9) ◽  
pp. 115-123 ◽  
Author(s):  
J. Rueedi ◽  
A.A. Cronin ◽  
B. Moon ◽  
L. Wolf ◽  
H. Hoetzl
Keyword(s):  
Water Management ◽  
Water Quality ◽  
United Kingdom ◽  
Water Supply ◽  
Social Acceptance ◽  
Management Strategies ◽  
Water Volume ◽  
Urban Water ◽  
Quality Model ◽  
Solute Fluxes

In Europe, large volumes of public water supply come from urban aquifers and so efficient urban water management and decision tools are essential to maintain quality of life both in terms of health, personal freedom and environment. In the United Kingdom, this issue gained increased importance with the last year's low volumes of groundwater replenishment that resulted in increased water shortages all over the country. An urban water volume and quality model (UVQ) was applied to a suburb of Doncaster (United Kingdom) to assess the current water supply system and to compare it with new potential scenarios of water management. The initial results show considerable changes in both water and solute fluxes for some scenarios and rather limited changes for others. Changing impermeable roads and paved areas to permeable areas, for example, would lead to higher infiltration rates that may be welcome from a water resources viewpoint but less so from a water quality point of view due to high concentrations of heavy metals. The biggest impact on water quality and quantity leaving the system through sewer, storm water and infiltration system was clearly obtained by re-using grey water from kitchen, bathroom and laundry for irrigation and toilet flush. The testing of this strategy led to lower volumes and higher concentrations of sewerage, a considerable decrease in water consumption and an increase in groundwater recharge. The scenarios were tested neither in terms of costs nor social acceptance for either water supplier or user.

Prediction of Water Quality in a Future Water Supply Reservoir

1987 ◽  
Vol 19 (5-6) ◽  
pp. 793-802
Author(s):  
Anton Filip ◽  
Miroslav Cvjetkovív
Keyword(s):  
Water Quality ◽  
Water Supply ◽  
Water Body ◽  
Weather Conditions ◽  
Quality Parameters ◽  
Phosphate Concentration ◽  
Dissolved Oxygen Concentration ◽  
Organic Sediment ◽  
Eutrophic Water ◽  
Water Supply Reservoir

The water quality in a future water supply reservoir has been predicted using mathematical modelling based upon data measurements of water, climate, watershed characteristics, reservoir morphology and hydraulics. The following water quality parameters were modelled: water temperature, dissolved oxygen concentration, algal content, BOD5, phosphate concentration, organic sediment, etc. One and five-year periods were simulated under oligotrophic, mesotrophic and eutrophic water body assumptions to follow the development of water quality. For wet, average and dry weather conditions and most probable mesotrophic productivity development, the water body quality in time was simulated. Based on simulation results, the withdrawal conditions, as amounts and depths, were defined.

Mixed Layer Models and Their Application to Water Quality Problems

1994 ◽  
Vol 29 (2-3) ◽  
pp. 221-232
Author(s):  
M.J. McCormick
Keyword(s):  
Water Quality ◽  
Mixed Layer ◽  
Thermal Structure ◽  
Mass Conservation ◽  
Eddy Diffusion ◽  
Rate Of Change ◽  
Surface Mixed Layer ◽  
Storm Events ◽  
Quality Model ◽  
Mixing Processes

Abstract Four one-dimensional models which have been used to characterize surface mixed layer (ML) processes and the thermal structure are described. Although most any model can be calibrated to mimic surface water temperatures, it does not imply that the corresponding mixing processes are well described. Eddy diffusion or "K" models can exhibit this problem. If a ML model is to be useful for water quality applications, then it must be able to resolve storm events and, therefore, be able to simulate the ML depth, h, and its time rate of change, dh/dt. A general water quality model is derived from mass conservation principles to demonstrate how ML models can be used in a physically meaningful way to address water quality issues.

scholarly journals Relative Performance of 1-D Versus 3-D Hydrodynamic, Water-Quality Models for Predicting Water Temperature and Oxygen in a Shallow, Eutrophic, Managed Reservoir

Water ◽  
2021 ◽  
Vol 13 (1) ◽  
pp. 88
Author(s):  
Xiamei Man ◽  
Chengwang Lei ◽  
Cayelan C. Carey ◽  
John C. Little
Keyword(s):  
Water Quality ◽  
Water Temperature ◽  
Water Quality Model ◽  
Relative Performance ◽  
Bubble Plume ◽  
Quality Model ◽  
Quality Models ◽  
Management Interventions ◽  
Water Quality Models ◽  
D Model

Many researchers use one-dimensional (1-D) and three-dimensional (3-D) coupled hydrodynamic and water-quality models to simulate water quality dynamics, but direct comparison of their relative performance is rare. Such comparisons may quantify their relative advantages, which can inform best practices. In this study, we compare two 1-year simulations in a shallow, eutrophic, managed reservoir using a community-developed 1-D model and a 3-D model coupled with the same water-quality model library based on multiple evaluation criteria. In addition, a verified bubble plume model is coupled with the 1-D and 3-D models to simulate the water temperature in four epilimnion mixing periods to further quantify the relative performance of the 1-D and 3-D models. Based on the present investigation, adopting a 1-D water-quality model to calibrate a 3-D model is time-efficient and can produce reasonable results; 3-D models are recommended for simulating thermal stratification and management interventions, whereas 1-D models may be more appropriate for simpler model setups, especially if field data needed for 3-D modeling are lacking.

Changes in water quality following renovation of a water supply reservoir

2005 ◽  
Vol 29 (2) ◽  
pp. 979-981
Author(s):  
R.W. Drenner ◽  
M.M. Chumchal ◽  
D.H. Marshall ◽  
J.L. Owens ◽  
M.R. Ernst
Keyword(s):  
Water Quality ◽  
Water Supply ◽  
Water Supply Reservoir

Development of water quality management strategies for the proposed isikli reservoir

1998 ◽  
Vol 37 (2) ◽  
pp. 369-376 ◽  
Author(s):  
Orhan Gündüz ◽  
Selçuk Soyupak ◽  
Coskun Yurteri
Keyword(s):  
Water Quality ◽  
Quality Management ◽  
Treatment Options ◽  
Water Quality Management ◽  
Management Strategies ◽  
Pollution Sources ◽  
Water Quality Standards ◽  
Quality Model ◽  
Control Techniques ◽  
Administrative Control

A two-dimensional laterally averaged hydrodynamic and water quality model (CE-QUAL-W2) is used to simulate the water quality behavior in the proposed Isikli Reservoir of the Ankara Water Supply System to determine appropriate strategies for the management of water quality. Isikli application of the model is used to demonstrate the potential water quality degradation patterns in the reservoir under different pollution loads. The results of the modeling study are compared with the drinking water quality standards currently effective in Turkey to formulate various water quality management strategies for the reservoir and its catchment area. In addition, various treatment options are evaluated considering the existing treatment system of Ankara City. Based on the findings of this study, treatment or interception of wastewaters originating from the existing pollution sources around the reservoir area are introduced as the major infrastructural control techniques. Further, establishment of protection zones around the reservoir and relocating the possible pollution sources to a point downstream of the dam axis are found to be the most applicable administrative control methods for water quality preservation in the proposed reservoir.

WATER QUALITY MANAGEMENT OF A WATER SUPPLY RESERVOIR

2004 ◽  
Vol 2004 (8) ◽  
pp. 632-656
Author(s):  
Howard Andrews ◽  
Robert Kortmann ◽  
William Knoll ◽  
Dana Ehlen
Keyword(s):  
Water Quality ◽  
Quality Management ◽  
Water Supply ◽  
Water Quality Management ◽  
Water Supply Reservoir

scholarly journals Evaluation of Two Management Strategies for Harvested Emergent Vegetation on Immature Mosquito Abundance and Water Quality

2020 ◽  
Vol 36 (3) ◽  
pp. 139-151
Author(s):  
William E. Walton ◽  
Kevin Mai ◽  
Andrew Nguyen ◽  
Rex Tse
Keyword(s):  
Water Quality ◽  
Water Supply ◽  
Management Practices ◽  
Plant Biomass ◽  
Management Strategies ◽  
Free Water ◽  
Vegetation Management ◽  
Water Volume ◽  
Turnover Rates ◽  
Mosquito Abundance

ABSTRACT Emergent macrophytes play critical roles in water treatment processes of free-water surface constructed treatment wetlands. Management strategies for plant biomass affect wetland function and mosquito populations. Sinking of harvested macrophyte biomass is thought to provide organic carbon that enhances denitrifying bacteria important for nutrient removal while concomitantly reducing harborage for mosquitoes. The effects of sinking versus floating dried plant biomass (California bulrush [Schoenoplectus californicus]) on immature mosquito abundance and water quality (nutrient levels, oxygen demand, and physicochemical variables) were examined in mesocosms (28-m2 ponds or 1.4-m2 wading pools) under different flow regimes in 4 studies. The numbers of mosquito larvae in earthen ponds with floating vegetation were greater than in ponds with sunken vegetation on most dates but did not differ significantly between the 2 vegetation treatments in experiments using wading pools. Differences of the abundance of Anopheles larvae between the 2 vegetation management treatments were larger than for Culex larvae when naturally occurring larval mosquito predators were present. At high turnover rates (>2 pond volumes/day), water quality did not differ significantly between the vegetation management treatments and the water supply. At low turnover rates (approximately 2–6% of water volume/day), water quality differed significantly between the 2 vegetation management treatments and the water supply. Sinking vegetation can enhance the effectiveness of mosquito control but, depending on water management practices, may raise the concentrations of water quality constituents in discharges that are regulated under the Clean Water Act.

scholarly journals Assessment of Surface Water Quality of Noyyal River Using Wasp Model

2018 ◽  
Vol 7 (1) ◽  
pp. 37-40
Author(s):  
G. Mahalakshm .
Keyword(s):  
Water Quality ◽  
Environmental Management ◽  
Tamil Nadu ◽  
Management Strategies ◽  
Surface Water Quality ◽  
Quality Model ◽  
Water Quality Simulation ◽  
Environmental Management Strategies ◽  
Water Environmental Management

The Noyyal River is a tributary of river Cauvery has been one of the most predominant and important rivers of Tamil Nadu. Unfortunately, certain stretches of river Noyyal are polluted due to effluent discharge from the industries and domestic sewage. The effective water environmental management strategies required to be implemented in this river to upgrade the water quality and to ensure sustainable development in the region. The aim of this work was to provide a basis for water environmental management in process of making important decisions. In this study WASP (Water Quality Simulation Program) is used as a model to identify the processes that underlie river water quality problems in a basin. WASP was recommended by EPA used as water quality model. Simulated values of Nitrate (NO3), Dissolved Oxygen (DO), Total Dissolved Solids (TDS), Alkalinity and pH demonstrated the accuracy of the model and despite a significant data shortage in the study area. WASP model was found to be an acceptable tool for the assessment of water quality.

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