Mathematical Model of Water Quality in a Highly Polluted Estuary

1978 ◽  
pp. 55-62 ◽  
Author(s):  
G. Billen ◽  
J. Smitz
Keyword(s):  
Mathematical Model ◽  
Water Quality

A Real-Time Mathematical Model for Three-Dimensional Tidal Flow and Water Quality

1991 ◽  
Vol 24 (6) ◽  
pp. 171-177 ◽  
Author(s):  
Zeng Fantang ◽  
Xu Zhencheng ◽  
Chen Xiancheng
Keyword(s):  
Mathematical Model ◽  
Water Quality ◽  
Real Time ◽  
Control Volume ◽  
Tidal Flow ◽  
Three Dimensional ◽  
River Estuary ◽  
Pearl River Estuary ◽  
Practical Application ◽  
The Pearl River

A real-time mathematical model for three-dimensional tidal flow and water quality is presented in this paper. A control-volume-based difference method and a “power interpolation distribution” advocated by Patankar (1984) have been employed, and a concept of “separating the top-layer water” has been developed to solve the movable boundary problem. The model is unconditionally stable and convergent. Practical application of the model is illustrated by an example for the Pearl River Estuary.

Study on Water Quality Improvement of Streams in Baoan District, Shenzhen City, China

2011 ◽  
Vol 347-353 ◽  
pp. 1902-1905
Author(s):  
Hua Li You
Keyword(s):  
Waste Water ◽  
Mathematical Model ◽  
Water Quality ◽  
Fresh Water ◽  
Water Discharge ◽  
Water Environment ◽  
Oxygen Demand ◽  
Polluted Water ◽  
Integrated Analysis ◽  
Shenzhen City

Water is the basis of natural resources and strategic economic resources.Deteriorated water environment of streams in Shenzhen city could have a great impact on ecological safety, people's health,and economic development.Based on the data of field observation and Remote sensing (RS) image,integrated analysis of the water degradation causes,and the changes of biochemical oxygen demand in five days(BOD5）concentration by mathematical model were carried out,which is on basis of percentage of waste water disposal,fresh water transformation,and harbor excavation, respectively.The results show that degradation causes of water quality were resulted from waste water discharge, harbor construction,and ecological environment damage, which could lead to slowly water exchange. Accordingly,the pollution can be easily to store in the bay,which result in water quality changes.The most important improved countermeasure is the control of waste water, which could be had a great effectiveness to decrease pollution.In addition, fresh water must be supplied after polluted water was cut off,which can be better improvement for water quality.This would be extreme improvement for hydrological dynamics due to 15m harbor excavation,which can significantly reduce BOD5 concentration.The innovation points of this paper is to mathematical model,which is based on the basis of qualitative analysis.

A two-dimensional mathematical model for water quality planning in estuaries

1977 ◽  
Vol 13 (1) ◽  
pp. 55-61 ◽  
Author(s):  
V. L. Zitta ◽  
A. Shindala ◽  
M. W. Corey
Keyword(s):  
Mathematical Model ◽  
Water Quality ◽  
Two Dimensional ◽  
Quality Planning

scholarly journals An Approach to the Quality of Drinking Water as a Matter of Multicriterial Decision

2021 ◽  
Vol 15 ◽  
pp. 17-24
Author(s):  
Amelia Bucur ◽  
Jose L. Lopez-Bonilla
Keyword(s):  
Mathematical Model ◽  
Water Quality ◽  
Drinking Water ◽  
Statistical Analysis ◽  
Quality Management ◽  
Mathematical Programming ◽  
Simulation Process ◽  
Percentage Points

The aim of the present paper is to approach the matter of water quality by resorting to the metod of multicriterial mathematical programming. MicrosoftExcel enables the simulation of a mathematical model. Furthermore, we have also created a file in the C++ software, in view of the simulation process, applicable to numberless properties of water quality. The case study presents the simulation of a multicriterial analysis of water quality in Sibiu county. This particular study shows the means of obtaining more information about water quality, subsequent to the analysis of its characteristics resorting to statistical analysis-specific software, e.g. SPSS 16 software. Given the increase of drinking water worldwide by tens of percentage points in cca two decades, the author(s) consider(s) that an approach to the quality management of drinking water should represent a key priority of society.

Development and evaluation of a mathematical model for the study of sediment-related water quality issues

2001 ◽  
Vol 43 (7) ◽  
pp. 47-54 ◽  
Author(s):  
W. Zeng ◽  
M. B. Beck
Keyword(s):  
Mathematical Model ◽  
Water Quality ◽  
Sediment Transport ◽  
Nutrient Dynamics ◽  
Specific Conductivity ◽  
Level Structure ◽  
Nutrient Concentrations ◽  
Data Set ◽  
Major Tributary ◽  
Quality Issues

A mathematical model (Sediment-Transport-Associated Nutrient Dynamics - STAND) has been developed for the study of sediment-associated water quality issues. The model is intended to simulate changes of water composition associated with sediment behavior. It has a 3-level structure. The first level accounts for the hydraulics of open-channel flow. The second computes sediment transport potential and actual rates based on the information provided by the first level. A non-equilibrium approach is used. In the third level, changes of nutrient concentrations along a studied river are computed with the consideration of nutrient transport, adsorption/desorption, and release. In order to calibrate the model, field data were collected from the Oconee River, a major tributary of the Altamaha River in Georgia, USA. Two stations, approximately 17 km distant from each other, were established along the river for the purpose of data collection. Observations of the river's hydraulics, suspended sediment, and water quality (mainly ortho-phosphate, nitrate, temperature, specific conductivity, oxidation-reduction potential, dissolved oxygen, and pH) were collected at the two stations. Another data set collected along a major tributary of the Yellow River in China was also used for calibration of the model's hydraulics and sediment transport parts. Calibration and validation results are encouraging, which suggests STAND may be a useful tool for the thorough study and understanding of nutrient dynamics associated with sediment behaviour.

scholarly journals Mathematical Model of the Water Quality in Kalibaru Watershed

2018 ◽  
Vol 207 ◽  
pp. 012007
Author(s):  
B Hariono ◽  
R Wijaya ◽  
M F Kurnianto ◽  
Sugiyarto ◽  
M J Wibowo ◽  
...  
Keyword(s):  
Mathematical Model ◽  
Water Quality
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