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Search Results: 1 - 10 of 39337 matches for " water quality "
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Boundary Element Analysis of Two Dimensional Structure Water Entry Based on Attached Water Quality  [PDF]
L. Zou, Z. Zong, S. Feng, G. X. Zhu, G. P. Yu
Journal of Applied Mathematics and Physics (JAMP) , 2016, DOI: 10.4236/jamp.2016.48163
Combining nonlinear boundary conditions of free liquid surface, the impact force of wedge shape profile and the change of free liquid surface were calculated and analyzed based on the solving ideas of Von Karman T. The results were compared with the results of the existing literature, and the results were in good agreement with the existing results. In addition, the impact forces of U profile and the external drift profile were calculated, and the impact load of two kinds of profiles were analyzed through time evolution.
Lake Water Monitoring Data Assessment by Multivariate Statistics  [PDF]
Vasil Simeonov, Pavlina Simeonova, Stefan Tsakovski, Vasil Lovchinov
Journal of Water Resource and Protection (JWARP) , 2010, DOI: 10.4236/jwarp.2010.24041
Abstract: The application of multivariate statistical methods to high mountain lakes monitoring data has offered some important conclusions about the importance of environmetric approaches in lake water quality assessment. Various methods like cluster analysis and principal components analysis were used for classification and projection of the data set from a big number of lakes from Pirin Mountain in Bulgaria. Additionally, self-organizing maps of Kohonen were constructed in order to solve some classification tasks. An effort was made to relate the maps with the input data in order to detect classification patterns in the data set. Thus, dis-crimination chemical parameters for each pattern (cluster) identified was found, which enables better inter-pretation of the ecological state of the system. A methodology for application of combination of different environmetric methods was suggested as a pathway to interpret high mountain lake waters monitoring data.
Trace Elements in the Drinking Water and Their Possible Health Effects in Aligarh City, India  [PDF]
Taqveem Ali Khan
Journal of Water Resource and Protection (JWARP) , 2011, DOI: 10.4236/jwarp.2011.37062
Abstract: Environmental degradation and unethical human intervention in the natural system has increased the concern for the betterment of healthy living. The deterioration of aquatic system is commonplace in the developing world. The present paper shows the trace elements (Ni, Zn, Fe, Pb, Cd, Co, Cu and Mn) concentrations in the drinking water of Aligarh city and their possible effect on the health of the inhabitants. The higher concen- tration of some elements in the drinking water and the poor health of inhabitants are found correlated. The statistical analysis of the data shows positive correlation between some elements. The principal component analysis of the data gives four factors with significance level of 42%, 29%, 15% and 12% respectively.
The Impact of Mine Effluents on the Water Quality and Macrophyte Plant Communities in the Kifubwa Stream, Solwezi, Zambia  [PDF]
Ketty M. Namwanja, Stanford M. Siachoono, Arthur M. Yambayamba, Lackson Chama
Natural Resources (NR) , 2018, DOI: 10.4236/nr.2018.95013
A study to assess the impact of mine effluents on water quality and macrophyte plant communities in the Kifubwa stream in Solwezi, Zambia was carried out in December 2015. The macrophytes species and water samples were collected from ten (10) selected sampling sites along the river. The initial sampling site was set at the point of pollution (effluents) entrance into the river. The other 9 sampling units of 30 m × 30 m were spaced at a uniform interval of 150 m throughout the 1.5 km section of the river sampled. Macrophytes collected at each sampling site were identified on site to family level using the Zambian Macrophytes Trophic Ranking (ZMTR) protocol developed under the Southern African River Assessment (SAFRASS). The abundance of macrophyte plant communities showed that family Polygonaceae had (27.5%), Cyperaceae, (23.5%), Amaranthaceae (17.6%), Hydrocharitaceae (17.6%) and Osmundaceae (13.8%) respectively. The Shannon-Weiner’s diversity index (H) was used to calculate the macrophyte diversity and the value used in a correlation analysis with potential of hydrogen (pH) and other water quality variable under investigation. The water samples were taken to the laboratory for analysis of water variables, namely, pH, Total Dissolved Solids (TDS), nitrates, phosphates, copper and zinc levels for
Development of El-Salam Canal Automation System  [PDF]
Noha Samir Donia
Journal of Water Resource and Protection (JWARP) , 2012, DOI: 10.4236/jwarp.2012.48069
Abstract: In Egypt irrigation water is becoming more scarce with the continuously increasing demand for agriculture, domestic and industrial purposes. To face this increasing irrigation demand, the available water supply in Egypt is supplemented by the reuse of agricultural drainage water as in El-Salam Canal that do not satisfy water quality standards defined for the canal. This paper introduces an automation system for El-Salam Canal to control the flow of the fresh water and drainage water supplied to the canal. This automatic control system (ACS) is able to process data of various flows and water quality data along the canal. This control system is represented by a canal computer model. This system computes the required control actions at the Damietta branch and the feeding drains. It is also able to generate optimum solutions for the canal to satisfy the pre-defined canal conditions and standards.
Spatial and Temporal Variation in Water Quality of River Benue, Nigeria  [PDF]
Ishaq S. Eneji, Agada P. Onuche, Rufus Sha’Ato
Journal of Environmental Protection (JEP) , 2012, DOI: 10.4236/jep.2012.328106
Abstract: The study investigates the spatial and temporal variation in water quality parameters at ten different locations along River Benue for twelve consecutive months. In order to explore the spatial variation among different stations and seasonal changes, multivariate analysis of variance (MANOVA) was used to group these on the basis of spatial similarities. MANOVA on season and station shows that there is no significant difference between the stations investigated while there is for the seasons. This could be viewed as a resulting from the narrow spatial sampling interval (12 km at 0.7% total length of River Benue). However, discriminate analysis identified all the parameters to discriminate between the three seasons with 99.2% correct assignations. Two discriminate functions were found and the total variance cumulative was 100% between seasons. The first function explained 64.8% of the total variance between the seasons while the second function explained 35.2%. Total solids (TS) were the highest contributor in discriminate functions 1 and 2. Therefore, discriminate function analysis would enable us to predict the likely season a water sample from metropolitan Makurdi was collected given the values of the water quality parameters. It also enables us to conclude that all the parameters were responsible for significant seasonal variations in River Benue water quality.
Assessment of Water Quality in Tigris River-Iraq by Using GIS Mapping  [PDF]
Abbas J. Kadhem
Natural Resources (NR) , 2013, DOI: 10.4236/nr.2013.46054

In this study, 96 water samples were collected from the Tigris River within Baghdad city. These samples were used for studying the physical and chemical parameters by using a geographical information system GIS (spatial analysis). The analytical results show high concentration of total dissolved solid (TDS), electric conductivity (EC), total hardness, Sulphate (SO4), Chloride (Cl) and Iron (Fe), which indicates signs of deterioration. On the other hand, the values of pH, calcium (Ca), Magnesium (Mg), and fluoride (F) are within permissible limits as per World Health Organization (WHO) and Iraqi Criteria.

Physically and Chemically Evaluation for the Water Quality Criteria in a Farm on Akcay  [PDF]
Ebru Yilmaz, Cengiz Ko?
Journal of Water Resource and Protection (JWARP) , 2014, DOI: 10.4236/jwarp.2014.62010

Akcay is a high flow stream supported with strong bracket and is emerging from border of Beyagac County in Denizli province. In this study, it was performed for determining some limnological traits of Akcay River in Bozdogan County in Aydin province. This study was conducted with a 12-month period between January 2010 and December 2010. The chosen pilot farm is raising fish (Oncorhynchus mykiss). The water of Akcay River is used on farm. Some limnological parameters (dissolved oxygen, temperature, pH, EC, nitrite, nitrate, orthophosphate, minerals) were investigated for determining the water quality of zone.

Seasonal and Spatial Variations in Water Physicochemical Quality of Coastal Potou Lagoon (C?te d’Ivoire, Western Africa)  [PDF]
Yéo Kandana Marthe, Goné Droh Lanciné, Kamagaté Bamory, Douagui Gountoh Aristide, Dembélé Ardjouma
Journal of Water Resource and Protection (JWARP) , 2015, DOI: 10.4236/jwarp.2015.79061
Abstract: The study investigates the seasonal and spatial variations in water quality parameters at four different locations along Potou lagoon for seventeen consecutive months. In order to explore spatial variation among different stations and seasonal changes, no parametric test of ANOVA was used to compare the mean values of the tested parameters for all the different sampling sites and seasons. Seasonal observations on water quality parameters and chlorophyll-a in Potou coastal lagoon revealed that the coastal water was significantly influenced by freshwater during the long and short rainy seasons. The seasonal significant variation (p < 0.05) was generally recorded between the long dry season and the short rainy season. Temperature, salinity, pH, dissolved oxygen, transparency and chlorophyll-a increased during the long dry season, whereas, the concentration of nutrients (nitrite, nitrate, ammonium and soluble reactive phosphorus) increased in the rainy periods. Contrary to the seasonal variation, a spatial homogeneity (horizontal) was registered for all variables, a condition related to the low human occupation in the lagoon watershed. Comparing this study with others conducted in Potou lagoon in 2008, no critical differences that evidence alteration in the water quality were found.
Urban Pond Water Contamination in India  [PDF]
Ankit Yadav, Pravin Kumar Sahu, Suryakant Chakradhari, Keshaw Prakash Rajhans, Shobhana Ramteke, Nohar Singh Dahariya, Gaurav Agnihotri, Khageshwar Singh Patel
Journal of Environmental Protection (JEP) , 2016, DOI: 10.4236/jep.2016.71005
Abstract: The stagnant water reservoirs in urban area of India are severely contaminated with surfactant and microbe due to anthropogenic activities. In this work, water quality of pond water of the most industrialized city: Raipur, CG, India is described. The concentration of surfactant in the term of sodium lauryl sulfate (SLS) in water (n = 16) is ranged from 7.0 - 27 mg/L with mean value of 17 ± 3 mg/L. All ponds are found to be contaminated with microbes i.e. bacteria, algae and fungi at elevated levels. The physico-chemical characteristics of the pond water are discussed.
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