Determination of Reaeration Coefficient of Saline Receiving Water for Water Quality Management

2016 ◽  
pp. 423-446
Author(s):  
Ching-Gung Wen ◽  
Jao-Fuan Kao ◽  
Chii Cherng Liaw ◽  
Mu-Hao S. Wang ◽  
Lawrence K. Wang
Keyword(s):  
Water Quality ◽  
Quality Management ◽  
Water Quality Management ◽  
Reaeration Coefficient ◽  
Receiving Water

Integrated water quality management

1996 ◽  
Vol 33 (4-5) ◽  
pp. 1-7 ◽  
Author(s):  
Vladimir Novotny
Keyword(s):  
Water Quality ◽  
Quality Management ◽  
Water Body ◽  
Habitat Restoration ◽  
Planning Process ◽  
Water Quality Management ◽  
Water Bodies ◽  
Quality Problem ◽  
Water Quality Problem ◽  
Receiving Water

Components of the integrated water quality management and planning process are described. The process is initiated by the Use Attainability Analysis (UAA) in which the ambient water quality-use based standards are justified and/or modified for the water body for which water quality management is being considered. The UAA has three components: (1) Water Body Assessment, (2) The Total Maximal Daily Load (TMDL) Process, and (3) Socio-economic Analysis. The first component identifies whether the receiving water body and watershed have a water quality problem and, subsequently, separates such water bodies into those where the water quality problem is caused by natural loads or conditions and those where man-made pollution inputs cause unacceptable water quality deterioration. The TMDL process separates water bodies into those for which water quality goals can be achieved by present and future mandated abatement of point and nonpoint sources (effluent limited water bodies) and those mandated abatement will not achieve the water quality goals (water quality limited water bodies). Extensive water quality management and expenditure of public funds is justified for the latter cases. Watersheds and receiving water bodies which are adversely affected predominantly by nonpoint (unregulated) discharges are declared as impaired and should be managed. Both reduction of waste discharges and enhancement of waste assimilative capacity-habitat restoration of the receiving water body should be considered in management of water quality limited receiving waterbodies.

Requirements for integrated wastewater models - driven by receiving water objectives

1998 ◽  
Vol 38 (11) ◽  
pp. 97-104 ◽  
Author(s):  
Wolfgang Rauch ◽  
Hans Aalderink ◽  
Peter Krebs ◽  
Wolfgang Schilling ◽  
Peter Vanrolleghem
Keyword(s):  
Water Pollution ◽  
Water Quality ◽  
Quality Management ◽  
Water Quality Management ◽  
Oxygen Depletion ◽  
Wastewater Discharge ◽  
Micro Organisms ◽  
The Impact ◽  
Technical Measures ◽  
Receiving Water

The design of efficient technical measures for the abatement of water pollution requires that wastewater discharge regulations are driven by receiving water objectives. However, such integrated water quality management is only possible when the impact to the aquatic ecosystem can be predicted quantitatively by means of integrated wastewater models. Typically, only a few types of wastewater discharge impacts are relevant for the state of the receiving water and, consequently, the structure of the model can be kept relatively simple when focusing on one of these impacts. The procedure of problem-oriented model selection is illustrated for three typical examples of acute water pollution, that is toxicity from un-ionized ammonia, hygienic hazard from pathogenic micro-organisms and oxygen depletion.

Operational Water Quality Management: Transient Events and Seasonal Variability

1991 ◽  
Vol 24 (6) ◽  
pp. 257-265 ◽  
Author(s):  
M. B. Beck ◽  
A. J. Adeloye ◽  
B. A. Finney ◽  
P. Lessard
Keyword(s):  
Water Quality ◽  
Quality Management ◽  
Water Quality Management ◽  
Treatment Plant ◽  
Restrictive Assumption ◽  
Operational Strategies ◽  
Transient Behaviour ◽  
Receiving Waters ◽  
Receiving Water

The practical urgency of addressing problems of the transient pollution of receiving waters by stormwater overflows has done much to assist in dismantling the restrictive assumption of a steady state that has until recently dominated analyses of water quality management. Despite this, however, there are still misconceptions about the complexity and data requirements of dynamic mathematical models, and about the capacity to exercise operational control over the hour-by-hour, day-by-day performance of a wastewater treatment plant. The paper reviews some of these misconceptions, and draws attention to the crucial need for servicing the development of models of transient behaviour with appropriately designed, specialised, monitoring exercises. Results from a case study based on the River Cam in eastern England are presented. These illustrate the impacts of stormwater discharges on the receiving water body as a function of various treatment plant designs and operational strategies. Results are also presented for a second case study, based on the Bedford Ouse River in eastern England. A dynamic model of receiving water quality has been used for assessing the scope for seasonally varying policies for the treatment of ammonium, subject to fish toxicity and in-plant oxygenation requirements. Further studies exploring the interactions between seasonally varying conditions and transient pollution events are currently in progress.

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