Characterizing pollutant loading from point sources to the Tongqi River of China based on water quality modeling

2019 ◽  
Vol 16 (11) ◽  
pp. 6599-6608 ◽  
Author(s):  
H. Yao ◽  
T. Ni ◽  
Z. You
Keyword(s):  
Water Quality ◽  
Water Quality Modeling ◽  
Point Sources ◽  
Pollutant Loading ◽  
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 Selection of Optimum Pollution Load Reduction and Water Quality Improvement Approaches Using Scenario Based Water Quality Modeling in Little Akaki River, Ethiopia

Water ◽  
2021 ◽  
Vol 13 (5) ◽  
pp. 584
Author(s):  
Zelalem Abera Angello ◽  
Beshah M. Behailu ◽  
Jens Tränckner
Keyword(s):  
Water Quality ◽  
Quality Improvement ◽  
Management Practices ◽  
Water Quality Modeling ◽  
Point Sources ◽  
Load Reduction ◽  
Pollution Load ◽  
Water Quality Improvement ◽  
Quality Modeling ◽  
Akaki River

The collective impacts of rapid urbanization, poor pollution management practices and insufficient sanitation infrastructure have driven the water quality deterioration in Little Akaki River (LAR), Ethiopia. Water quality modeling using QUAL2Kw was conducted in the LAR aimed at selecting the optimal water quality improvement and pollution load reduction approaches based on the evaluation of five scenarios: modification of point sources (PS) load (S1), modification of nonpoint sources (NPS) load (S2), simultaneous modification of PS and NPS load (S3), application of local oxygenators and fish passages using cascaded rock ramps (S4), and an integrated scenario (S5). Despite the evaluation of S1 resulting in an average load reduction of Biochemical Oxygen Demand (BOD) (17.72%), PO4-P (37.47%), NO3-N (19.63%), the water quality objective (WQO) in LAR could not be attained. Similarly, though significant improvement of pollution load was found by S2 and S3 evaluation, it did not secure the permissible BOD and PO4-P pollution load in the LAR. Besides, as part of an instream measure, a scenario evaluated using the application of rock ramps (S4) resulted in significant reduction of BOD load. All the individual scenarios were not successful and hence an integration of scenarios (S5) was evaluated in LAR that gave a relatively higher pollutant load reduction rate and ultimately was found a better approach to improve pollution loads in the river. In conclusion, pollution load management and control strategy integrally incorporating the use of source-based wastewater treatment, control of diffuse pollution sources through the application of best management practices and the application of instream measures such as the use of cascaded rock ramps could be a feasible approach for better river water quality management, pollution reduction, aquatic life protection and secure sustainable development in the LAR catchment.

scholarly journals Water Quality Modeling For Pollutant Carrying Capacity Assessment Using Qual2Kw In Bedog River

2018 ◽  
Vol 50 (1) ◽  
pp. 49 ◽  
Author(s):  
Akhmad Darajati Setiawan ◽  
M. Widyastuti ◽  
M. Pramono Hadi
Keyword(s):  
Water Quality ◽  
Carrying Capacity ◽  
Drainage System ◽  
Oxygen Demand ◽  
Water Quality Modeling ◽  
Point Sources ◽  
Residential Areas ◽  
Primary Parameter ◽  
Quality Modeling ◽  
Pollutant Sources

Considering the abundance of potential pollutant sources along Bedog River, i.e. highly dense residential areas, agricultural lands, and industrial areas, this study aimed to quantitatively assess the Pollutant Load (PL) and Pollutant Carrying Capacity (PCC) of the river based on Chemical Oxygen Demand (COD) and Biological Oxygen Demand (BOD)parameters. The assessment employed a water quality modeling using Qual2Kw that provided not only the comprehensive values of PL and PCC but also the amount of PL that should be reduced to meet the PCC of every river segment. Water sampling and primary parameter measurement were conducted purposively in seven observation points, which included one point source and six non-point sources (river segments). River segments were determined according to the characteristics of land use and drainage system. Descriptive, graphic, and spatial analyses on water quality modeling show that the COD and BOD of Bedog River (2.24 km) indicates a small presence of PL compared to the river’s PCC. The PCC allows additional pollutant loads of 566.95 kg/day or 0.024 ton/hour BOD and 22,965.12 kg/day or 0.96 ton/hour COD. However, a high BOD in segments 3, 5, and 6 and a high COD in segment 5 imply the needs for PL reduction.

A water quality modeling study of non-point sources at recreational marine beaches

2011 ◽  
Vol 45 (9) ◽  
pp. 2985-2995 ◽  
Author(s):  
Xiaofang Zhu ◽  
John D. Wang ◽  
Helena M. Solo-Gabriele ◽  
Lora E. Fleming
Keyword(s):  
Water Quality ◽  
Water Quality Modeling ◽  
Point Sources ◽  
Quality Modeling ◽  
Modeling Study

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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