Water Quality Modeling and Dissolved Oxygen Balance in Streams: A Point Source Streeter-Phelps Application in the Case of the Harsit Stream

2009 ◽  
Vol 37 (1) ◽  
pp. 67-74 ◽  
Author(s):  
S. Serkan Nas ◽  
Evin Nas
Keyword(s):  
Water Quality ◽  
Dissolved Oxygen ◽  
Point Source ◽  
Water Quality Modeling ◽  
Oxygen Balance ◽  
Quality Modeling

Water quality modeling in the watershed-based approach for waste load allocations

1998 ◽  
Vol 38 (10) ◽  
pp. 165-172 ◽  
Author(s):  
Ruochuan Gu ◽  
Mei Dong
Keyword(s):  
Water Quality ◽  
Point Source ◽  
Water Quality Modeling ◽  
Point Sources ◽  
Low Flow ◽  
Quality Analysis ◽  
Management Approach ◽  
Water Quality Control ◽  
Quality Modeling ◽  
Waste Load

The conventional method for waste load allocations (WLA) employs spatial-differentiation, considering individual point sources, and temporal-integration, using a constant flow, typically 7Q10 low flow. This paper presents a watershed-based seasonal management approach, in which non-point source as well as point sources are incorporated, seasonal design flows are used for water quality analysis, and WLA are performend in a watershed scale. The strategy for surface water quality modeling in the watershed-based approach is described. The concept of seasonal discharge management is discussed and suggested for the watershed-based approach. A case study using the method for the Des Moines River, Iowa, USA is conducted. Modeling considerations and procedure are presented. The significance of non-point source pollutant load and its impact on water quality of the river is evaluated by analyzing field data. A water quality model is selected and validated against field measurements. The model is applied to projections of future water quality situations under different watershed management and water quality control scenarios with respect to river flow and pollutant loading rate.

scholarly journals Water quality modeling of the effects of macrophytes on dissolved oxygen in a shallow tailwater reservoir

2008 ◽  
Vol 24 (4) ◽  
pp. 339-348 ◽  
Author(s):  
J. Stansbury ◽  
L. Kozimor ◽  
D. Admiraal ◽  
E. Dove
Keyword(s):  
Water Quality ◽  
Dissolved Oxygen ◽  
Water Quality Modeling ◽  
Quality Modeling

Application of QUAL2Kw for water quality modeling and dissolved oxygen control in the river Bagmati

2006 ◽  
Vol 125 (1-3) ◽  
pp. 201-217 ◽  
Author(s):  
Prakash R. Kannel ◽  
Seockheon Lee ◽  
Sushil R. Kanel ◽  
Young-S Lee ◽  
Kyu-H Ahn
Keyword(s):  
Water Quality ◽  
Dissolved Oxygen ◽  
Water Quality Modeling ◽  
Oxygen Control ◽  
Dissolved Oxygen Control ◽  
Quality Modeling

scholarly journals SWAT Modeling of Non-Point Source Pollution in Depression-Dominated Basins under Varying Hydroclimatic Conditions

2018 ◽  
Vol 15 (11) ◽  
pp. 2492 ◽  
Author(s):  
Mohsen Tahmasebi Nasab ◽  
Kendall Grimm ◽  
Mohammad Bazrkar ◽  
Lan Zeng ◽  
Afshin Shabani ◽  
...  
Keyword(s):  
Water Quality ◽  
Point Source ◽  
Assessment Tool ◽  
The United States ◽  
Water Quality Modeling ◽  
Water Quantity ◽  
Basic Scenario ◽  
Calibration And Validation ◽  
Calibration Scheme ◽  
Quality Modeling

Non-point source (NPS) pollution from agricultural lands is the leading cause of various water quality problems across the United States. Particularly, surface depressions often alter the releasing patterns of NPS pollutants into the environment. However, most commonly-used hydrologic models may not be applicable to such depression-dominated regions. The objective of this study is to improve water quantity/quality modeling and its calibration for depression-dominated basins under wet and dry hydroclimatic conditions. Specifically, the Soil and Water Assessment Tool (SWAT) was applied for hydrologic and water quality modeling in the Red River of the North Basin (RRB). Surface depressions across the RRB were incorporated into the model by employing a surface delineation method and the impacts of depressions were evaluated for two modeling scenarios, MS1 (basic scenario) and MS2 (depression-oriented scenario). Moreover, a traditional calibration scheme (CS1) was compared to a wet-dry calibration scheme (CS2) that accounted for the effects of hydroclimatic variations on hydrologic and water quality modeling. Results indicated that the surface runoff simulation and the associated water quality modeling were improved when topographic characteristics of depressions were incorporated into the model (MS2). The Nash–Sutcliffe efficiency (NSE) coefficient indicated an average increase of 30.4% and 19.6% from CS1 to CS2 for the calibration and validation periods, respectively. Additionally, the CS2 provided acceptable simulations of water quality, with the NSE values of 0.50 and 0.74 for calibration and validation periods, respectively. These results highlight the enhanced capability of the proposed approach for simulating water quantity and quality for depression-dominated basins under the influence of varying hydroclimatic conditions.

scholarly journals Utilization of Water Quality Modeling and Dissolved Oxygen Control in River Tungabhadra, Karnataka (India)

OALib ◽  
2019 ◽  
Vol 06 (05) ◽  
pp. 1-17 ◽  
Author(s):  
S. Ranjith ◽  
Anand V. Shivapur ◽  
P. Shiva Keshava Kumar ◽  
Chandrashekarayya G. Hiremath ◽  
Santhosh Dhungana
Keyword(s):  
Water Quality ◽  
Dissolved Oxygen ◽  
Water Quality Modeling ◽  
Oxygen Control ◽  
Dissolved Oxygen Control ◽  
Quality Modeling

Hydrodynamic and Water Quality Modeling of Lake Eğirdir

2014 ◽  
Vol 42 (11) ◽  
pp. 1573-1582 ◽  
Author(s):  
Meltem Kaçıkoç ◽  
Mehmet Beyhan
Keyword(s):  
Water Quality ◽  
Water Quality Modeling ◽  
Quality Modeling
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