river water Articles
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Bathing in polluted rivers, Water-Borne Diseases, and fuzzy measures: a case study in India
Religious bathing in river water is practised in India and Nepal since time memorable. The World Health Organization in their report (2002) states that diarrhoeal diseases alone killed over 700,000 Indians in the year 1999. In spite of best efforts, there has been no straightforward solution technique available to prove/disprove the cause – effect relationship between bathing in river ...
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Wacker-Chemie, Burghausen, Bavaria, Germany - Case Study
OVERVIEW Germany’s biggest silicone manufacturer with more than 10.000 employees. 50% of the computer processors worldwide are produced with Wacker-Chemie Silicone / Silicates. WATER SYSTEM CHALLENGES River water with high calcium carbonate content, causing scaling problems in all kind of technical facilities. Wacker-Chemie uses river water for cooling in their manufacturing processes. ...
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Identifying sources of groundwater in the lower Colorado River valley, USA, with δ18O, δD, and 3H: implications for river water accounting
Isotope measurements (18O, D, 3H) indicate groundwater origin in the Lower Colorado River Valley (LCRV) and provide an alternative, or supplement, to the US Bureau of Reclamations proposed accounting surface method. The accounting surface method uses a hydraulic criterion to identify certain wells away from the flood plain that will eventually yield mainstream Colorado River water. New isotope ...
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Are people willing to pay for river water quality, contingent valuation
Now a day’s water pollution has caused incoveriences for people whom live near the Pavana river in Pune city, India. The river water quality has deteriorated by major water quality parameters like dissolved oxygen (DO), biological oxygen demand (BOD) and phosphates level. In present study it is tried to find people’s willingness to pay (WTP) for improvement of river water quality. Contingent ...
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Application of long amplicon propidium monoazide-PCR to assess the effects of temperature and background microbiota on pathogens in river water
The decay rates of enteric waterborne pathogens were evaluated following the introduction of Yersinia enterocolitica, Salmonella enterica, Campylobacter jejuni and Arcobacter butzleri into river water at different temperatures (5, 15 and 25°C) for a period of 28 days. To improve the accuracy of the results a molecular viability assay, long amplicon propidium monoazide-polymerase chain ...
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Biodegradation of bisphenol A, 17 β-estradiol, and 17 α-ethynylestradiol in river water
The degradation of bisphenol A (BPA), 17 β-estradiol (E2), and 17 α-ethynylestradiol (EE2) in river water was investigated. Moreover, the effects of temperature, nutrient salts, easily degraded coexisting organic matter, and the addition of municipal wastewater, were studied. The half-lives of E2 are six days at 20°C and three days at 30°C in river water, respectively. BPA is degraded ...
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Remediation of polluted river water by biological contact oxidation process using two types of carriers
Biological contact oxidation technology was used to remediate the polluted river water in Hanyang, China. The purification effect of the polluted river water in three simulated rivers was investigated using two different carriers, i.e., AquaMats made in USA and semi flexible supports made in China. The results showed that when the hydraulic loading rate increased, purification effect in terms of ...
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Water is a catalyst for peace
This papers presents a reflection about the work of the World Commission on Dams during the past two years. The reasons for and against large river dams are discussed, the sources of conflict explored, and arguments advanced for the importance of using water resources governance as a catalyst for cooperation and peace.Keywords: conflict management, dams, peace, rivers, water ...
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Contamination by Organochlorine Pesticides from Rivers
The contamination of organochlorine pesticides (OCPs) from the selected rivers in Okinawa Island was investigated to estimate the current status of pollution in water, plants and surface sediments in these rivers. The Aja River, Asato River, Houtoku River, Kokuba River and Okukubi River were selected for this study. The concentration of the total pesticides were in the range of 0.94-231.8 ng/L in ...
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Influence of a dual monsoon system and two sources of groundwater recharge on Kofu basin alluvial fans, Japan
This study investigates the contribution ratios of different groundwater recharge sources and influence of a dual monsoon system in Kofu basin, central Japan, through the hydrogen and oxygen isotopic analysis of precipitation, river water, and groundwater. The study is focused on the area of the Kamanashigawa and Midaigawa alluvial fans, which are formed by two main rivers. Precipitation ...
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Natural colloids are the dominant factor in the sedimentation of nanoparticles
Estimating the environmental exposure to manufactured nanomaterials is part of risk assessment. Because nanoparticles aggregate with each other (homoaggregation) and with other particles (heteroaggregation), the main route of the removal of most nanoparticles from water is aggregation, followed by sedimentation. The authors used water samples from two rivers in Europe, the Rhine and the Meuse. To ...
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River water pollution in Indonesia: an input-output analysis
Data from global environmental monitoring activities have shown alarming environmental conditions in many developing countries. Environmental policies that could improve the environment significantly, while at the same time maintaining the growth of economic activities are needed. Using an input-output analysis, this paper researches such policies with a view to applying them to Indonesia's river ...
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Pollution of surface runoff from the territory of Brest, Belarus
The assessment of the influence of urban surface runoff on the quality of river water in the city of Brest was made. Surface runoff was studied in two phases (winter and summer) for the following parameters: pH, total suspended solids (TSS), concentration of chloride, nitrate, phosphate and ammonium ions, total oils. The results show that urban surface runoff is an important source of pollution ...
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River water is filtered for use in an electronic disk manufacturing facility in Hokkaido, Japan
New Logic International installed its Vibratory Shear Enhanced Processing (VSEP) Phase I system in July, 1997, and the Phase II system in August 1998 at a major international electronic disk manufacturing facility at Hokkaido Island located in Northern Japan. The VSEP is used for treatment of river water for ultrapure water production at this facility. The VSEP system uses an ultrafiltration ...
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An investigation into a treatment strategy for the Berg River water at the Voëlvlei water treatment plant
The main aim of this study was to determine a treatment strategy for the Berg River water at the Voëlvlei water treatment plant (WTP). Jar tests were conducted using ferric and aluminium sulphate as coagulants to determine the optimum treatment parameters of the Berg River water and the Voëlvlei WTP raw water. The results for the Voëlvlei WTP raw water and the Berg River water with ferric ...
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Error analysis for river water quality prediction using back propagation modelling
The purpose of this research is to describe the errors of Back Propagation (BP) technique that could be applied in river water quality prediction. ANN was trained by using the upriver data to forecast the downriver quality in two approaches of long-distance forecasting and short-distance forecasting respectively. It showed that the predicted results from short-distance approach were more accurate ...
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River Monitoring
The monitoring of River water has impications not only on the environmental impacts of heavy metals but also upon the quality of drinking water. THis case study covers an analyser installed in a remote location using low voltage power supplies to suppliment the local mains power supply which cannot be relied ...
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A study to estimate the fate and transport of bacteria in river water from birds nesting under a bridge
To investigate the effect of input parameters, such as the number of bridge-dwelling birds, decay rate of the bacteria, flow at the river, water temperature, and settling velocity, a parametric study was conducted using a water quality model developed with QUAL2Kw. The reach of the bacterial-impaired section from the direct droppings of bridge-nesting birds at the Guadalupe River near ...
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Microbial degradation of N-methyl-2-pyrrolidone in surface water and bacteria responsible for the process
Due to widespread utilization in many industrial spheres and agrochemicals, N-methyl-2-pyrrolidone (NMP) is a potential contaminant of different surface water ecosystems. Hence, investigation was made into its aerobic microbial degradability in samples of water from a river, wetland area and spring. The results showed that the compound was degradable in all water types, and that the fastest ...
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Protecting RO membranes at a pet food manufacturer - Case Study
APPLICATION Monitoring of a river water intake to a RO treat-ment process that provides water for a pet food manufacturer CUSTOMER Pet Food Manufacturer, UK PROBLEM Accidents with hydrocarbon contamination in the river meant that the customer could have to re-place a new RO membrane installation at a very high ...
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