Retrospective effect and analysis of the pollutant of waste water on the Yangtze River water quality

2011 ◽  
Author(s):  
YingWang LiXin ◽  
Mingchang Li
Keyword(s):  
Waste Water ◽  
Water Quality ◽  
River Water ◽  
Yangtze River ◽  
River Water Quality ◽  
The Yangtze River

How polluted is the Yangtze river? Water quality downstream from the Three Gorges Dam

2008 ◽  
Vol 402 (2-3) ◽  
pp. 232-247 ◽  
Author(s):  
Beat Müller ◽  
Michael Berg ◽  
Zhi Ping Yao ◽  
Xian Feng Zhang ◽  
Ding Wang ◽  
...  
Keyword(s):  
Water Quality ◽  
River Water ◽  
Yangtze River ◽  
River Water Quality ◽  
Three Gorges Dam ◽  
Three Gorges ◽  
The Yangtze River ◽  
The Three Gorges ◽  
The Three Gorges Dam

Experimental investigation on water quality standard of Yangtze River water source heat pump

2012 ◽  
Vol 66 (5) ◽  
pp. 1103-1109 ◽  
Author(s):  
Zenghu Qin ◽  
Mingwei Tong ◽  
Lin Kun
Keyword(s):  
Water Quality ◽  
Surface Water ◽  
River Water ◽  
Heat Pump ◽  
Yangtze River ◽  
Water Source ◽  
Quality Standard ◽  
Heat Pumps ◽  
The Yangtze River ◽  
Water Conditions

Due to the surface water in the upper reaches of Yangtze River in China containing large amounts of silt and algae, high content of microorganisms and suspended solids, the water in Yangtze River cannot be used for cooling a heat pump directly. In this paper, the possibility of using Yangtze River, which goes through Chongqing, a city in southwest China, as a heat source–sink was investigated. Water temperature and quality of the Yangtze River in the Chongqing area were analyzed and the performance of water source heat pump units in different sediment concentrations, turbidity and algae material conditions were tested experimentally, and the water quality standards, in particular surface water conditions, in the Yangtze River region that adapt to energy-efficient heat pumps were also proposed. The experimental results show that the coefficient of performance heat pump falls by 3.73% to the greatest extent, and the fouling resistance of cooling water in the heat exchanger increases up to 25.6% in different water conditions. When the sediment concentration and the turbidity in the river water are no more than 100 g/m3 and 50 NTU respectively, the performance of the heat pump is better, which can be used as a suitable river water quality standard for river water source heat pumps.

Automatic Monitoring of River Water Quality

1984 ◽  
Vol 16 (5-7) ◽  
pp. 289-294 ◽  
Author(s):  
T Kohonen
Keyword(s):  
Waste Water ◽  
Water Quality ◽  
River Water ◽  
Continuous Monitoring ◽  
Waste Water Treatment ◽  
Automatic Monitoring ◽  
Water Quality Monitoring ◽  
River Water Quality ◽  
National Board ◽  
Near Future

Since 1972 the Finnish National Board of Waters has taken an active part in development of the automatic water quality monitoring. Eleven automatic stations liave been used minly for continuous monitoring of river water quality. The parameters used; temperature, pH, conductivity, DO and turbidity, are only the indicators about the change in loading. Automatic monitoring has in several cases revealed previously undetected variations in water quality. Continuous monitoring has produced useful information about the proportional magnitude and durability of variations in water quality. The abundance of data rakes the use of statistical methods possible for determining optimal sampling frequencies. In the near future new parameters can be used for controlling contents and thus also loadings. Then the automatic monitoring should be broadened to waste water treatment plants and to processes of factories. In that case it should be possible already to prevent waste water discharges before the watercourse.

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.

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