Water quality criteria for total suspended solids (TSS) in urban wet-weather discharges

2006 ◽  
Vol 54 (6-7) ◽  
pp. 355-362 ◽  
Author(s):  
L. Rossi ◽  
R. Fankhauser ◽  
N. Chèvre
Keyword(s):  
Water Quality ◽  
Urban Areas ◽  
Suspended Solids ◽  
Quality Criteria ◽  
Aquatic Organisms ◽  
Total Suspended Solids ◽  
Water Quality Criteria ◽  
Combined Sewer Overflows ◽  
Wet Weather ◽  
Rain Events

Total suspended solids (TSS) from combined sewer overflows (CSOs) and stormwater discharges represent a crucial parameter for evaluating wet-weather pollution in urban areas. In fact, the increase of TSS in water during rain events can have ecotoxic effects on aquatic organisms. Furthermore, major potentially harmful substances such as heavy metals, PAHs and organic matter are adsorbed onto TSS and later settle on sediment. Water quality criteria for TSS consequently enable the risk of wet-weather pollution to be assessed, for instance to avoid detrimental effects on aquatic organisms. The criteria proposed in this study cover the short-term impact of TSS on fish (acute quality criteria AQC), taking into account the duration of their exposure in the receiving water. The concentration-exposure duration-effect curve proposed here thus predicts “ill effects” on fish for different exposure times and TSS concentrations. The ecotoxic effects of adsorbed pollutants are also taken into account with an additional safety factor. We implement this TSS criteria in a software that allows us to estimate the number of rain events that exceed a given morbidity threshold for fishes per year.

scholarly journals ASSESSING SURFACE WATER QUALITY IN FRESHWATER RESERVOIRS IN AN GIANG PROVINCE, VIET NAM

2021 ◽  
Vol 1 (42) ◽  
pp. 78-85
Author(s):  
Giao Thanh Nguyen
Keyword(s):  
Water Quality ◽  
Surface Water ◽  
Suspended Solids ◽  
Oxygen Demand ◽  
Surface Water Quality ◽  
Principal Component ◽  
Quality Criteria ◽  
Water Quality Criteria ◽  
Pca Analysis ◽  
Group Water

Water quality is critical for a healthy ecosystem, this study was conducted to evaluate the surface water quality in lakes in An Giang Province from 2017 to 2019. Water quality was assessed using variables of temperature, pH, dissolved oxygen (DO), total suspended solids (TSS), chemical oxygen demand (COD), biological oxygen demand (BOD), nitrate (NO3- - N), phosphate (PO3 4- - P ), ammonia (NH+ 4 - N), and coliforms at nine locationsbelonging to seven reservoirs including O Tuk Sa, Thuy Liem, Soai So, Soai Chek, O Thum, O Ta Soc, and Bung Binh Thien. Water quality criteria were assessed according to the National Technical Regulation on Surface Water Quality (QCVN 08-MT: 2015/BTNMT). Cluster analysis (CA) and principal component analysis (PCA)were applied to group water quality to identify the main parameters affecting water quality in the reservoirs. The findings indicated that the water quality in the reservoirs were polluted by TSS, organic matters (DO was low, while COD and BOD were high), and microorganisms (coliforms). The PCA analysis showed that the watervariables including temperature, pH, DO, TSS, COD, BOD, NO3- - N, PO3 4- - P , NO3- - N, and coliforms significantly influenced the surface of the water in the reservoirs. It is necessary to investigate pollution sources to propose appropriate solutions to treat and maintain the water quality in the reservoirs of An Giang Province .

Stochastic modeling of total suspended solids (TSS) in urban areas during rain events

2005 ◽  
Vol 39 (17) ◽  
pp. 4188-4196 ◽  
Author(s):  
Luca Rossi ◽  
Vladimir Krejci ◽  
Wolfgang Rauch ◽  
Simon Kreikenbaum ◽  
Rolf Fankhauser ◽  
...  
Keyword(s):  
Stochastic Modeling ◽  
Urban Areas ◽  
Suspended Solids ◽  
Total Suspended Solids ◽  
Rain Events

The Impact of Storm Sewage Discharges on the Ecology of a Small Urban River

1990 ◽  
Vol 22 (10-11) ◽  
pp. 163-171 ◽  
Author(s):  
J. Seager ◽  
R. G. Abrahams
Keyword(s):  
Water Quality ◽  
Physiological Responses ◽  
Quality Criteria ◽  
Water Quality Criteria ◽  
Combined Sewer Overflows ◽  
Combined Sewer ◽  
Receiving Waters ◽  
Sewer Overflows ◽  
Sewage Discharges

Intermittent discharges of storm sewage from combined sewer overflows continue to be one of the principal causes of poor water quality in many urban rivers in the UK. Despite the persistent nature of this problem, very little attention has been given to the study of how discharges of varying magnitude, duration and frequency affect the ecological quality of receiving waters. This information is of critical importance for deriving meaningful water quality criteria for the control of intermittent pollution. This paper describes the results of a study which has been carried out on Pendle Water, a river which flows through the urban catchment of Burnley, Lancashire, UK. Both the chemical and biological quality of Pendle Water are adversely affected by storm sewage discharges during heavy rainfall events. The ecological investigation has been primarily concerned with impact of these episodic discharges on benthic invertebrate communities and physiological responses in fish. Quantitative sampling of macroinvertebrates has indicated that storm sewage discharges may have a significant impact on the structure and diversity of benthic communities in receiving waters. Physico-chemical properties of habitats appear to be altered in a way which tends to favour the proliferation of certain pollution-tolerant species and decrease the abundance of taxa intolerant of organic pollution. Insitu bioassays, including the WRc Mark III Fish Monitor, have been deployed to investigate physiological responses to storm events of different magnitude, duration and frequency. Results are discussed in relation to their application in the field validation of proposed water quality criteria for the control of intermittent pollution from combined sewer overflows.

scholarly journals Progress in the Research of the Toxicity Effect Mechanisms of Heavy Metals on Freshwater Organisms and Their Water Quality Criteria in China

2020 ◽  
Vol 2020 ◽  
pp. 1-12 ◽  
Author(s):  
Ya-jun Hong ◽  
Wei Liao ◽  
Zhen-fei Yan ◽  
Ying-chen Bai ◽  
Cheng-lian Feng ◽  
...  
Keyword(s):  
Heavy Metals ◽  
Water Quality ◽  
Heavy Metal ◽  
Management Practices ◽  
Quality Criteria ◽  
Aquatic Organisms ◽  
Future Research ◽  
Water Quality Criteria ◽  
Metal Pollutants ◽  
Heavy Metal Pollutants

Water quality criteria are the scientific basis for formulating water quality standards and environmental management practices. Due to the development of urbanization and industrialization, the problem of heavy metal pollution has become a serious environmental problem. Heavy metals not only have major impacts on aquatic organisms, but also seriously threaten human health. However, the current environmental criteria refer to the maximum value limitations of environmental factors in environmental media where harmful or detrimental effects are not produced on specific protected objects. This study reviewed the sources, hazard levels, toxic effect mechanisms, and the current research status of China’s water quality criteria for heavy metal pollutants. In addition, the focus and direction of future research on the toxic effects of heavy metal on aquatic organisms and the necessary criteria changes were discussed. The present study would provide an important theoretical basis for the future research of water quality criteria and risk assessment of heavy metal pollutants.

scholarly journals Neglect of Temperature and pH Impact Leads to Underestimation of Seasonal Ecological Risk of Ammonia in Chinese Surface Freshwaters

2019 ◽  
Vol 2019 ◽  
pp. 1-7 ◽  
Author(s):  
Zhen-Guang Yan ◽  
Jun-Tao Fan ◽  
Xin Zheng ◽  
Shu-Ping Wang ◽  
Xiao-Shan Guo ◽  
...  
Keyword(s):  
Water Quality ◽  
Ecological Risk ◽  
Quality Criteria ◽  
Aquatic Organisms ◽  
Ammonia Nitrogen ◽  
Water Quality Criteria ◽  
Water Parameters ◽  
Highly Sensitive ◽  
Ph Impact ◽  
Ecological Risk Assessments

Ammonia nitrogen (AN) is evaluated with fixed water quality standards (WQSs) in aquatic environment management in China. Since the toxicity of AN can be influenced by water parameters, the current evaluation is not rigorous and may result in problematic conclusions. The present study collected the ecotoxicity and exposure data of AN in Chinese surface freshwaters in 2017. The species sensitivity distribution of AN was established, and the ecological risk posed by AN in Chinese surface waters was assessed with Chinese AN water quality criteria. The results showed that mollusk species are the most sensitive taxa to AN. Ecological risk assessments on AN suggested that, in summer and autumn, when the water temperature and pH are high, the risk of AN may occur at some sites with good water quality (Class II or III). This poses a threat to aquatic organisms at these sites, especially highly sensitive freshwater shellfish. It suggested that neglect of water parameters impact may lead to underestimation of ecological risk of AN in Chinese basins.

Volume Analysis for Attainability of Water Quality Criteria for Three Loading Constituents

2004 ◽  
Author(s):  
Ping Wang ◽  
Lewis Linker ◽  
James Collier ◽  
Gary Shenk ◽  
Robert Koroncai ◽  
...  
Keyword(s):  
Water Quality ◽  
Quality Criteria ◽  
Water Quality Criteria ◽  
Volume Analysis
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