The Han River: Water Quality & Ecosystem-A Comparison with the Potomac River Management-

1999 ◽  
Vol 3 (1) ◽  
pp. 95-107
Author(s):  
Yearn Hong Choi
Keyword(s):  
Water Quality ◽  
River Water ◽  
River Management ◽  
River Water Quality ◽  
Potomac River ◽  
Han River

scholarly journals Longitudinal Chemical Gradients and the Functional Responses of Nutrients, Organic Matter, and Other Parameters to the Land Use Pattern and Monsoon Intensity

Water ◽  
2022 ◽  
Vol 14 (2) ◽  
pp. 237
Author(s):  
Md Mamun ◽  
Ji Yoon Kim ◽  
Jeong-Eun Kim ◽  
Kwang-Guk An
Keyword(s):  
Water Quality ◽  
Organic Matter ◽  
River Water ◽  
Suspended Solids ◽  
Algal Growth ◽  
River Water Quality ◽  
Functional Responses ◽  
Han River ◽  
Functional Relations ◽  
Pollution Indicator

River water quality degradation is one of the hottest environmental issues worldwide. Therefore, monitoring water quality longitudinally and temporally is crucial for effective water management and contamination control. The main aim of this study was to assess the longitudinal variations in water quality in the mainstream of the Han River, Korea, from 2015 to 2019. The trophic state classification (TSC), microbial pollution indicator (MPI), and river pollution index (RPI) were calculated to characterize river water quality and revealed more serious pollution toward the downstream zone (Dz) due to agricultural and urban-dominated areas. The biodegradability index (BI) indicated that non-biodegradable organic pollutants are increasing in the water body from the urban and animal wastewater treatment plants. Nutrients, organic matter contents, total suspended solids, ionic factors, and algal chlorophyll were higher in the Dz than in any other zones and were markedly influenced by the summer monsoon. Empirical analysis showed that nutrients and organic matter had positive linear functional relations with agricultural and urban coverage and negative linear relations with forest coverage. The pollutant-transport function suggested that suspended solids act as TP and TN carriers. Regression analysis indicated that TP (R2 = 0.47) has more positive functional relations with algal growth than TN (R2 = 0.22). Our findings suggest that a combination of empirical models and pollution indices might be utilized to assess river water quality and that the resulting information could aid policymakers in managing the Han River.

MULTIVARIATE STATISTICAL ANALYSES OF DANUBE RIVER WATER QUALITY AT GALATI, ROMANIA

2018 ◽  
Vol 17 (5) ◽  
pp. 1249-1266
Author(s):  
Gabriel Murariu ◽  
Paula Popa ◽  
Mihaela Timofti ◽  
Lucian Puiu Georgescu
Keyword(s):  
Water Quality ◽  
River Water ◽  
River Water Quality ◽  
Statistical Analyses ◽  
Danube River ◽  
Multivariate Statistical Analyses ◽  
Multivariate Statistical

Klamath River Water Quality and Acoustic Doppler Current Profiler Data from Link River Dam to Keno Dam, 2007

2008 ◽  
Author(s):  
Annett B. Sullivan ◽  
Michael L. Deas ◽  
Jessica Asbill ◽  
Julie D. Kirshtein ◽  
Kenna D. Butler ◽  
...  
Keyword(s):  
Water Quality ◽  
River Water ◽  
Acoustic Doppler Current Profiler ◽  
River Water Quality ◽  
Klamath River ◽  
Current Profiler ◽  
Profiler Data

MODELING THE ORGANIC REMOVAL AND OXYGEN CONSUMPTION BY BIOFILMS IN AN OPEN-CHANNEL FLOW

1994 ◽  
Vol 30 (2) ◽  
pp. 53-61 ◽  
Author(s):  
Shiyu Li ◽  
Guang Hao Chen
Keyword(s):  
Water Quality ◽  
Oxygen Consumption ◽  
River Water ◽  
Channel Flow ◽  
Diffusion Layer ◽  
Open Channel ◽  
Open Channel Flow ◽  
River Water Quality ◽  
Monod Kinetics ◽  
Organic Removal

A mathematical model is proposed to predict the removal of dissolved organic substances and the consumption of dissolved oxygen by attached biofilms in an open-channel flow. The model combines the biofilm equations with the conventional Streeter–Phelps type equations of river water quality by considering the mass transfer of organics and oxygen in the river water through the diffusion layer into the biofilm. It is assumed that the diffusion and reaction within the biofilm are of steady-state, and follow Monod kinetics. The model is solved numerically with a trial-and-error method. The simulation results of the model for an ideal case of river flow and biofilm show that the organic removal rate and oxygen consumption rate caused by the biofilm are greater than that by suspended biomass. The effects of diffusion layer thickness, flow velocity, and biofilm thickness on the change of river water quality are discussed.

scholarly journals Relationship between distribution of phytoplankton with Cimanuk river water quality

2021 ◽  
Vol 1098 (5) ◽  
pp. 052020
Author(s):  
L S Mulyani ◽  
R Mardiani ◽  
C Ardiana ◽  
S Nurkamilah
Keyword(s):  
Water Quality ◽  
River Water ◽  
River Water Quality
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