river water quality Articles
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Accumulated state assessment of the Peace‐Athabasca‐Slave River System
Effects‐based analysis is a fundamental component of watershed cumulative effects assessment. This study conducted an effects‐based analysis for the Peace‐Athabasca‐Slave River System, part of the massive Mackenzie River Basin, encompassing 20% of Canada's total land mass and influenced by cumulative contributions of the W.A.C. Bennett Dam (Peace River) and industrial activities including oil ...
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Development and assessment of an integrated ecological modelling framework to assess the effect of investments in wastewater treatment on water quality
Worldwide, large investments in wastewater treatment are made to improve water quality. However, the impacts of these investments on river water quality are often not quantified. To assess water quality, the European Water Framework Directive (WFD) requires an integrated approach. The aim of this study was to develop an integrated ecological modelling framework for the River Drava (Croatia) ...
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Adapted optimization model for planning regional wastewater systems: case study
Wastewater systems are of crucial importance to the promotion of sustainable development. Through an integrated planning approach, the costs can be minimized and the resulting benefits maximized. A planning approach at regional level exploits the economies of scale, while achieving a better environmental performance. In this paper we set out a decision support approach for the planning of ...
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Receiving water body quality assessment: an integrated mathematical approach applied to an Italian case study
This study presents a basin-scale approach to the analysis of receiving water body quality considering both point and non-point pollution sources. In particular, this paper describes an extensive data gathering campaign carried out in the Nocella catchment, which is an agricultural and semi-urbanised basin located in Sicily, Italy. Two sewer systems, two wastewater treatment plants and a river ...
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Water quality assessment of a polluted urban river
Urban rivers in Latin America are heavily impacted by human activities that affect their functions and services. This paper shows the results of a water quality assessment for the Reconquista River, the second most polluted urban river in Argentina. They allowed the identification of the main processes of transport of pollutants and the prioritisation of different areas of the basin for ...
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Receiving water quality assessment: comparison between simplified and detailed integrated urban modelling approaches
Urban water quality management often requires use of numerical models allowing the evaluation of the cause–effect relationship between the input(s) (i.e. rainfall, pollutant concentrations on catchment surface and in sewer system) and the resulting water quality response. The conventional approach to the system (i.e. sewer system, wastewater treatment plant and receiving water body), considering ...
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A method for estimating watershed restoration feasibility under different treatment levels
The restoration of watershed health can be influenced by ecological, technical and socio-economic factors. The paper presents a conceptual framework and typology to assess watershed ecological restoration based on the properties and processes of sustainable watershed development. According to multiple life stages, habitat properties and existing legal frameworks and applicable valuation ...
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Application of classification trees to determine biological and chemical indicators for river assessment: case study in the Chaguana watershed (Ecuador)
Benthic macroinvertebrates were sampled in the Chaguana river basin in SW Ecuador in March (wet season) and September (dry season) of 2005 and 2006. Aquatic insects dominated the macrobenthos, with Trichoptera, Diptera, Ephemeroptera, Hemiptera and Odonata being the orders with the highest diversity and Ephemeroptera and Diptera being most abundant. No systematic differences in richness and ...
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Water quality assessment of Yamuna River in Delhi region using index mapping
Water quality indices (WQI) were introduced with the aim of reducing great amount of parameters into a simpler expression and enabling easy interpretation of monitoring data. In this study, an attempt has been made to devise a methodology to integrate the WQI with geographic information system (GIS) for an effective interpretation of the quality status of the river. River Yamuna in Delhi has been ...
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Applying biotic ligand models and Bayesian techniques: Ecological risk assessment of copper and nickel in Tokyo rivers
Biotic ligand models (BLMs) have been broadly accepted and used in ecological risk assessment of heavy metals for toxicity normalization with respect to water chemistry. However, the importance of assessing bioavailability by using BLMs has not been widely recognized among Japanese stakeholders. Failing to consider bioavailability may result in less effective risk management than would be ...
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The multiple stressor ecological risk assessment for the mercury contaminated South River and upper Shenandoah River using the Bayesian Network‐Relative Risk Model
We have conducted a regional scale risk assessment using the Bayesian Network Relative Risk Model (BN‐RRM) to calculate the ecological risks to the South River and upper Shenandoah River study area. Four biological endpoints (smallmouth bass, white sucker, Belted Kingfisher and Carolina Wren) and four abiotic endpoints (Fishing River Use, Swimming River Use, and Boating River Use and Water ...
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Pollution and its impact on Noyyal river basin, India: an integrated approach of remote sensing and biotechnology using GIS
Numerous surface and ground water resources have been polluted by industries located around the river Noyyal, India. The water quality has been estimated to define the impact of contaminants in the study area. Fish sample (O.mosaambicus) has been collected from different locations. An elevated level of RBC, WBC count and changes in total percentage has been observed. Glutathione peroxidise ...
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Water quality assessment and conservation strategies for the upper stretch of Hindon river – a tributary of Yamuna, India
The study was conducted to know the pollution status of upper stretch of Hindon River and its temporal changes over monsoon, post-monsoon and pre-monsoon seasons due to change of physiochemical parameters during the period June 2011 to May 2012. The upper stretch of the river receives large amount of untreated domestic discharge, agricultural runoff and industrial effluents and now considered to ...
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ENPI-SEIS East Region Synthesis Report - Building a Shared Environmental Information System with the Eastern Neighbourhood
Since 2010, the European Environment Agency (EEA) has been engaging countries of the Eastern European Neighbourhood Policy (ENP-East) (Armenia, Azerbaijan, Belarus, Georgia, Moldova and Ukraine) in a partnership: the aim to improve national capacities for managing and sharing environmental data and information. This cooperation was implemented under the framework of the European Union (EU)- ...
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Evaluation of groundwater qualities in a paddy-dominated alluvial fan
Analytically assessing groundwater quality is indispensable for sustainable use of groundwater and its effective pollution controls. A large volume of groundwater is stored in the Tedori River alluvial fan one of which of the predominant land uses being irrigated paddy fields. Much groundwater under the fan is used for drinking and industrial purposes. For assessing agricultural activities at ...
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Assessment of impacts from various hydro-ecological factors on oxygen budgets of a regulated river: a case study of the Petchburi River, western Thailand
Investigations of dissolved oxygen (DO) levels and related water quality in the Petchburi River, a regulated river system in western Thailand, were conducted at 3-month intervals from May 2010 to February 2012. The results indicated generally good water quality with DO levels >4 mg L−1. Variations in water quality, particularly the DO and ammonium nitrogen levels along the river, ...
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Modeling the impacts of climate change and future land use variation on microbial transport
The impact of waterborne micro-organisms (potentially pathogenic) on public health may be exacerbated by the combined effects of climate and land use change. We used watershed modeling to assess the potential effects of climate change and future land management scenarios on microbial water quality in the Pigg River watershed, located in southwest Virginia, USA. The hydrologic simulation ...
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Combined risk prediction in the water environment based on an MS–AR model and Copula theory
Making a quantitative prediction on the combined risk of the water body is helpful for the objective evaluation of the water environment system's state of health, and also has important results for the water environment system's safety management. In this paper, the Markov status switching theory (Markov Switching, MS), Monte Carlo method (Monte Carlo, MC) and Copula theory were ...
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Risk Assessment/Toxicology Promotes Health and Welfare of Humans and Ecosystems
Hundreds of regulations protecting the health and welfare of humans and ecosystems impact industrial and legal firms every day. Commonly, these regulations are associated with protecting human health and the environment from risks associated with site cleanup and closure or remediation projects. Other major health risk regulations are derived from Natural Resources Damage Assessment (NRDA), ...
By AECOM
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Tools to improve water quality
This post is part of a series on World Water Week, an annual event designed to draw attention to and discuss global water issues. Read more posts in this series. Agricultural production often comes at the expense of water quality. As my colleague, Mindy Selman, noted in a recent blog post, “Agriculture is the leading source of nutrient pollution in waterways—a situation that’s ...
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