Biological and functional responses of in situ bioassays with Chironomus riparius larvae to assess river water quality and contamination

2006 ◽  
Vol 371 (1-3) ◽  
pp. 125-137 ◽  
Author(s):  
Mafalda S. Faria ◽  
Ana Ré ◽  
João Malcato ◽  
Paula C.L.D. Silva ◽  
João Pestana ◽  
...  
Keyword(s):  
Water Quality ◽  
River Water ◽  
Chironomus Riparius ◽  
River Water Quality ◽  
Functional Responses ◽  
In Situ Bioassays

scholarly journals Simulation of river water quality from in-situ data and satellite imagery, focus on organic pollutants

2017 ◽  
Author(s):  
Tran Thi Van ◽  
Ha Duong Xuan Bao ◽  
Pham Thi Anh My ◽  
Tran Lap Phong ◽  
Tran Viet Tri
Keyword(s):  
Water Quality ◽  
River Water ◽  
Organic Pollutants ◽  
Satellite Imagery ◽  
River Water Quality ◽  
In Situ Data

scholarly journals Micronucleus test in fish for in situ evaluation of the Sinos River water quality, in Brazil

2019 ◽  
Vol 41 ◽  
pp. e38
Author(s):  
Leonardo Airton Ressel Simões ◽  
Thaís Dalzochio ◽  
Angélica Goldoni ◽  
Mateus Santos de Souza ◽  
Gabriela Zimmermann Prado Rodrigues ◽  
...  
Keyword(s):  
Water Quality ◽  
River Water ◽  
Micronucleus Test ◽  
Physicochemical Analysis ◽  
River Water Quality ◽  
Urban Wastewater ◽  
Nuclear Abnormalities ◽  
Total Phosphorous ◽  
Urban Wastewater Treatment

The Sinos River basin is impacted by industrial and agricultural activities, as well as by low rates of urban wastewater treatment. The purpose of this study was to monitor de Sinos River water quality using the micronucleus test in fish and the analysis of water physicochemical parameters. Bryconamericus iheringii specimens were captured in December 2013 (summer) and July 2014 (winter) at two sites located in the Sinos River: Caraá, in the upper section of the basin, and Parobé, in the middle section. After capture, animals were immediately killed and blood samples were collected for the micronucleus test. No significant differences were observed in micronucleus frequencies between sites and sampling periods. However, in the summer, nuclear abnormalities frequencies observed in Parobé were significantly higher than in Caraá. A higher frequency of nuclear abnormalities was also found in fish captured in Caraá during winter, in comparison with frequencies found in the summer. The results for the water physicochemical analysis showed values of total phosphorous, aluminum, lead, copper and iron above the allowed limits established by the Brazilian legislation. The nuclear abnormalities induction found in the present study may be associated to the presence of cytogenotoxic substances in the water.

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.

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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