water quality study Articles
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Water Quality Monitoring and Assessment
The book attempts to covers the main fields of water quality issues presenting case studies in various countries concerning the physicochemical characteristics of surface and groundwaters and possible pollution sources as well as methods and tools for the evaluation of water quality status. This book is divided into two sections: Statistical Analysis of Water Quality Data;Water Quality Monitoring ...
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Reconstruction of river water quality missing data using artificial neural networks
The monitoring of river water quality is important for human life and the health of the environment. However, water quality studies in many parts of the world, especially in developing countries, are restricted by the existence of missing data. In this study, the efficiency of the multilayer perceptron (MLP) and radial basis function (RBF) networks for recovering the missing values of 13 ...
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Surveying Company Meets New Challenges with In-Situ Equipment
Overview A Pacific Northwest surveying firm successfully expanded its capabilities using the Aqua TROLL 600 to monitor water quality for a large industrial customer. Challenge Statewide Land Surveying Inc. was looking for opportunities to take their surveying expertise into environmental applications. So, when a large industrial facility in Oregon asked them to conduct bathymetric surveys and ...
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Parameter sensitivity of a watershed-scale flood forecasting model as a function of modelling time-step
Although ongoing technological advances have alleviated data restrictions and most of the computational barriers to distributed modelling, lumped, parsimonious, conceptual and rainfall-runoff models are still widely used for flood forecasting. However both optimum parameter values and the fluxes of water through individual model components change significantly with the time-step used. Thus, ...
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An Islamic perspective on water quality: a case of Malaysia
Water pollution has long been a crisis of life-threatening proportion in many Muslim countries. It is therefore timely to determine the role of traditional Islamic jurisprudence in outlining the water quality standards. This study examines the Islamic and scientific approaches in appraising water quality. More specifically, this study used the Taharah–Najasah (T–N) standards ...
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Developing a national water quality criteria system in China
Water quality criteria (WQC) form a scientific basis for the development of water quality standards. The study of WQC in China has been insufficient. This mini review introduces the progress that has been made towards the establishment of a WQC system in China. A systematic WQC study has been ongoing in China for several years, mainly referring to the WQC system in the United States. Some ...
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An integrated assessment of sediment remediation in a Midwestern U.S. stream using sediment chemistry, water quality, bioassessment, and fish biomarkers
A comprehensive biological, sediment, and water quality study of the lower Little Scioto River near Marion, Ohio, USA, was undertaken to evaluate the changes or improvements in biotic measurements following the removal of creosote‐contaminated sediment. The study area covered 7.5 river miles (RMs), including a remediated section between RMs 6.0 and 6.8. Fish and macroinvertebrate assemblages, ...
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Determination of water quality index by fuzzy logic approach: a case of ground water in an Indian town
The paper proposes fuzzy logic model that deals with the physico-chemical water analysis of ground water of Chikhli town for determination of Water Quality Index (WQI). The study was carried by collection of ground water samples from about eleven hand pumps located in this town. Ground water quality is studied by systematic collection and analysis of samples. The fuzzy logic is used for the ...
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Merrimack Water Quality Study using UVF to Detect Hydrocarbons and Natural Organics in Merrimack River, Massachusetts - Case Study
Project Description: This study was performed to help support a customer in Washington State looking to distinguish if surface water contains oil sheens or bio sheens using their UVF-Trilogy analyzer. Bio sheens can look like oil sheens but are naturally occurring and are not caused by petroleum spills. Water high in organic content from algae, decayed plant matter or from bacteria in stormwater ...
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Water quality analysis of reservoirs within Western Algeria catchment areas using water quality index CCME WQI
The present paper aims at determining the status and trends in water quality at Western Algeria reservoirs. The method consists of the computation of Water Quality Index (WQI) on the basis of the physical–chemical quality parameters that were registered at the monitoring stations placed at the reservoirs. This WQI was applied to water quality data collected from 2001 to 2010. Results ...
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Factors influencing nitrification in point-of-use BioSand filters
The BioSand filter (BSF) is a point-of-use treatment technology used in developing countries to improve drinking water quality. Studies on the BSF to date have mainly focused on bacterial, protozoan and virus reduction and less on the filter's effect on chemical contaminants that may also affect human health. This study explored the potential for nitrification in field-scale trials of ...
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From Microbiotest to Decision Support System : an Assessment Framework for Surface Water Toxicity
Abstract : A decision framework for the site-specific detection of toxic effects of contaminants in surface waters is presented. Although the main objective of the development of this framework aimed at supporting water quality boards in their studies on polluted waters and sediments, it could also be of wider use. The decision framework is illustrated by means of a case study on a ditch that is ...
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Time series modeling of biochemical oxygen demand at the upstream catchment of Feitsui Reservoir, Taiwan
The adaptive neuro fuzzy inference system (ANFIS) has been proposed to model the time series of water quality data in this study. The biochemical oxygen demand data collected at the upstream catchment of Feitsui Reservoir in Taiwan for more than 20 years are selected as the target water quality variable. The classical statistical technique of the Box-Jenkins method is applied for the ...
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Preliminary results of water quality assessment using phytoplankton and physicochemical approaches in the Huai River Basin, China
Water pollution has been a significant issue in the Huai River Basin (HRB) of China since the late 1970s. In July and December 2013, two field investigations were carried out at 10 sites along the main streams of the basin. The monitoring indices contained both physicochemical variables and the structure and composition of phytoplankton communities. The correlations between communities and ...
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Tools for monitoring distribution system water quality: a study using four parallel pilot systems
Monitoring and understanding water quality changes within the distribution system is essential to enable effective management to provide good quality water at the customer tap. A recent 2-year study utilised four parallel pilot distribution systems (PDS) and a range of simple tools to assess the impact improving treatment had on the water quality within the distribution system. Particle ...
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Application of CCME Water Quality Index to Monitor Water Quality: A Case Study of the Mackenzie River Basin, Canada
All six ecosystem initiatives evolved from many years of federal, provincial, First Nation, local government and community attention to the stresses on sensitive habitats and species, air and water quality, and the consequent threats to community livability. This paper assesses water quality aspect for the ecosystem initiatives and employs newly developed Canadian Council of Ministers of the ...
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Input variable selection and calibration data selection for storm water quality regression models
Storm water quality models are useful tools in storm water management. Interest has been growing in analyzing existing data for developing models for urban storm water quality evaluations. It is important to select appropriate model inputs when many candidate explanatory variables are available. Model calibration and verification are essential steps in any storm water quality modeling. This ...
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Assessment of River Water Quality in Northwestern Greece
The effect of land use patterns on river water quality was studied in three different river basins located in Epirus, Northwestern Greece. Studies were conducted from October 2000 to {September} 2001. During this period, the parameters chemical oxygen demand (COD), biological oxygen demand (BOD), NO2–, NO3–, NH4+ and PO43– were measured, employing standard methods of analysis. The results were ...
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Analysis of trends in water quality: constructed wetlands in metropolitan Taipei
Meandering through the most densely populated metropolitan areas of Taipei, Taiwan, the Danshui River and its tributaries have undergone the construction of 14 wetlands since 2004, as a means to improve water quality. This study was conducted to examine the functional capabilities associated with treating non-point source pollution through these riparian wetlands. Trend analysis was used to ...
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Integrated assessment and scenarios simulation of urban water security system in the southwest of China with system dynamics analysis
The demand for global freshwater is growing, while global freshwater available for human use is limited within a certain time and space. Its security has significant impacts on both the socio-economic system and ecological system. Recently, studies have focused on the urban water security system (UWSS) in terms of either water quantity or water quality. In this study, water resources, water ...
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