scholarly journals Assessment of nutrients and dissolved oxygen in a river system in Bangladesh using a water quality model.

2000 ◽  
pp. 97-107 ◽  
Author(s):  
Md. Rezaul KARIM ◽  
ABM BADRUZZAMAN ◽  
Masahiko SEKINE ◽  
Masao UKITA
Keyword(s):  
Water Quality ◽  
Dissolved Oxygen ◽  
River System ◽  
Water Quality Model ◽  
Quality Model

Modeling water quality in an oil sands compensation lake

2015 ◽  
Vol 42 (11) ◽  
pp. 901-909 ◽  
Author(s):  
Jianhua Jiang ◽  
Jerry Vandenberg ◽  
Ian Halket ◽  
Kasey Clipperton ◽  
Richard J. Kavanagh ◽  
...  
Keyword(s):  
Water Quality ◽  
Dissolved Oxygen ◽  
Water Temperature ◽  
Oil Sands ◽  
Fish Habitat ◽  
Environmental Modeling ◽  
Water Quality Model ◽  
Quality Data ◽  
Quality Model ◽  
Water Quality Data

Surface mining in the oil sands region of Alberta, Canada, often requires that mining operators drain lakes or divert streams to access the underlying ore. “Compensation lakes” can be constructed to create new fish habitat to offset the loss of fish habitat due to mining activity and to satisfy conditions under a project’s Fisheries Act Authorization. The design of these lakes requires prediction of future water temperature and dissolved oxygen levels to determine the suitability of the new habitat for fish. These predictions are made using a calibrated hydrodynamic and water quality model. Until recently, there were not any built compensation lakes in the region with enough measured water quality data that could be used to calibrate such a model. This paper uses measured data from Horizon Lake, a recently built compensation lake, to calibrate Generalized Environmental Modeling System of Surfacewaters (GEMSS), a three-dimensional hydrodynamic and water quality model, used to model the lake. Horizon Lake was built in 2008 by Canadian Natural Resources Ltd. and water quality in the lake has been monitored for the last seven years. The results of the model calibration to observed water temperature and dissolved oxygen provide rates and coefficients, notably sediment oxygen demand, that can be used to improve model applications to other planned compensation lakes.

Assessment of pollution of the river Buriganga, Bangladesh, using a water quality model

1999 ◽  
Vol 40 (2) ◽  
pp. 129-136 ◽  
Author(s):  
Mir Mostafa Kamal ◽  
Anders Malmgren-Hansen ◽  
A. B. M. Badruzzaman
Keyword(s):  
Water Quality ◽  
River Water ◽  
River System ◽  
Integrated Approach ◽  
Quality Parameters ◽  
Water Quality Model ◽  
River Water Quality ◽  
Dhaka City ◽  
Quality Model ◽  
The Status

The River Buriganga, which runs past Dhaka City, is at present one of the most polluted rivers in Bangladesh. Dhaka City is very densely populated and will be one of the ten ‘Mega Cities’ by the year 2000. However, only a small fraction of the total wastewater being generated in the City is treated. Consequently, the amount of untreated wastes, both domestic and industrial, being released into the Buriganga is tremendous and is increasing day by day. Therefore, the objectives of this study were to investigate the status of the river water quality in terms of some cardinal water quality parameters, and to simulate the dissolved oxygen (DO) level using a water quality model. In order to fulfil the objectives, a comprehensive data acquisition programme – from both in situ and laboratory testing – was carried out. Then, a one-dimensional water quality model was developed for the Buriganga River system for a dry period of 1994-95. Different scenarios were tested to predict the most likely condition of the river. The results of the model simulations have replicated the alarming low DO level in the Buriganga. Option runs show that an integrated approach would be required to restore the river water quality with regard to biodegradable pollutants.

scholarly journals Environmental Flow for Sungai Johor Estuary

2018 ◽  
Vol 34 ◽  
pp. 02041
Author(s):  
A.Kadir Adilah ◽  
Yusop Zulkifli ◽  
Z. Noor Zainura ◽  
Baharim N. Bakhiah
Keyword(s):  
Water Quality ◽  
Dissolved Oxygen ◽  
Water Temperature ◽  
Oxygen Demand ◽  
Correlation Coefficients ◽  
Water Quality Model ◽  
Surface Elevation ◽  
Quality Model ◽  
Quality Models ◽  
Water Quality Models

Sungai Johor estuary is a vital water body in the south of Johor and greatly affects the water quality in the Johor Straits. In the development of the hydrodynamic and water quality models for Sungai Johor estuary, the Environmental Fluid Dynamics Code (EFDC) model was selected. In this application, the EFDC hydrodynamic model was configured to simulate time varying surface elevation, velocity, salinity, and water temperature. The EFDC water quality model was configured to simulate dissolved oxygen (DO), dissolved organic carbon (DOC), chemical oxygen demand (COD), ammoniacal nitrogen (NH3-N), nitrate nitrogen (NO3-N), phosphate (PO4), and Chlorophyll a. The hydrodynamic and water quality model calibration was performed utilizing a set of site specific data acquired in January 2008. The simulated water temperature, salinity and DO showed good and fairly good agreement with observations. The calculated correlation coefficients between computed and observed temperature and salinity were lower compared with the water level. Sensitivity analysis was performed on hydrodynamic and water quality models input parameters to quantify their impact on modeling results such as water surface elevation, salinity and dissolved oxygen concentration. It is anticipated and recommended that the development of this model be continued to synthesize additional field data into the modeling process.

scholarly journals Puget Sound Dissolved Oxygen Modeling Study: Development of an Intermediate Scale Water Quality Model

2012 ◽  
Author(s):  
Tarang Khangaonkar ◽  
Brandon Sackmann ◽  
Wen Long ◽  
Teizeen Mohamedali ◽  
Mindy Roberts
Keyword(s):  
Water Quality ◽  
Dissolved Oxygen ◽  
Puget Sound ◽  
Water Quality Model ◽  
Quality Model ◽  
Intermediate Scale ◽  
Study Development ◽  
Modeling Study
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