scholarly journals Impact of solid waste on water quality of Bishnumati River and surrounding areas in Kathmandu, Nepal

1970 ◽  
Vol 31 ◽  
pp. 19-24 ◽  
Author(s):  
Dinesh C. Devkota ◽  
Kunio Watanabe
Keyword(s):  
Water Quality ◽  
Solid Waste ◽  
Urban Economy ◽  
Health Hazard ◽  
Subsurface Water ◽  
Kathmandu Valley ◽  
Shallow Wells ◽  
Surrounding Areas ◽  
Very High

Haphazard dumping of solid waste on the banks of the Bishnumati River in the Kathmandu valley has severely deteriorated the surface and subsurface water quality. The river water as well as shallow wells in the vicinity exhibited very high conductivity as well as high nitrate, nitrite, and COD concentrations. Though the water in the shallow wells is not potable, it is being used by the inhabitants. Improper waste management has caused environmental pollution, increased public health hazard, and adversely impacted on urban economy.

scholarly journals Status of water quality in Kathmandu valley

2004 ◽  
Vol 30 ◽  
Author(s):  
Timila Bhaba Singh
Keyword(s):  
Water Quality ◽  
Oxygen Demand ◽  
Water Quality Monitoring ◽  
Analysis Data ◽  
Subsurface Water ◽  
Kathmandu Valley ◽  
Guideline Values ◽  
Shallow Wells ◽  
Main Determinants ◽  
Bagmati River

The surface and subsurface water of the Kathmandu valley has been severely contaminated by various pollutants since the last fifteen years. Many factors have played their role in polluting the rivers and wells of the valley. The water quality monitoring of the Bagmati River and its tributaries revealed a strong seasonal variation. Ammonia, nitrate, phosphate, dissolved Oxygen, biological oxygen demand, chemical oxygen demand, and total suspended solids are the main determinants of river water pollution. Similarly, the water samples drawn from various deep tubewells, shallow wells, and springs reveal a remarkable contamination of groundwater. Most of the deep tubewells of the Kathmandu valley consist of a greater amount of ammonia and iron as well as higher turbidity and colour values than those of the WHO guideline values. The water analysis data of the Bagmati River and its tributaries show an increasing contamination trend in the densely populated areas. Minbhawan, The Hanumante Khola, Dhobi Khola, Tukucha, Teku, and the Bishnumati Khola are comparatively more polluted while the Nakhu Khola and Balkhu Khola are less contaminated. The quality of groundwater is also deteriorating day by day due to the inadequate precautions and facilities to treat sewage and wastewater.

scholarly journals Solid Waste And Its Interference On The Water Quality Of The Igarapé¹ do Quarenta Educandos Basin - Manaus/Am

2021 ◽  
Vol 9 (11) ◽  
pp. 78-88
Author(s):  
Michael Raphael Soares Vieira ◽  
Aixa Braga Lopes ◽  
Eneida Guerra Silvestrim ◽  
Arlindo Almeida de Lima Filho ◽  
Kamila Vitoriano Gianello ◽  
...  
Keyword(s):  
Heavy Metals ◽  
Water Quality ◽  
Electrical Conductivity ◽  
Solid Waste ◽  
Sampling Site ◽  
The City ◽  
Waste Accumulation ◽  
Very High ◽  
Macroscopic Analysis

The “Igarapé do Quarenta”, a stream in Educandos basin, is categorized today as the "worst" and most polluted of the city Manaus, Amazonas, due to the accumulation of solid waste and contamination by heavy metals along its course. The main objective of this research was to verify the influence of solid waste in critical points of the Igarapé do Quarenta, on the water quality of the stream. The area of solid waste accumulation ("garbage") and the water quality in the stream and around and under the bridges of the Igarapé do Quarenta, between the springs (Armando Mendes and Zumbi neighborhoods) and the mouth (Educandos), in the Amazon "summer" and "winter"," were quantified. Water quality was evaluated at each sampling site. The macroscopic analysis demonstrated its importance for the feasibility diagnosis, finding that two of the three springs found are degraded and disturbed. The pH and electrical conductivity values in the sample sites visited, in the upper and middle, of the Igarapé do Quarenta, were very high values in relation to the maximum values recorded in a natural environment in other water streams of Manaus.

Comparison of the water quality of the surface microlayer and subsurface water in the Guangzhou segment of the Pearl River, China

2014 ◽  
Vol 24 (3) ◽  
pp. 475-491 ◽  
Author(s):  
Qing Liu ◽  
Xiaojuan Hu ◽  
Jiangluan Jiang ◽  
Junyi Zhang ◽  
Zhihui Wu ◽  
...  
Keyword(s):  
Water Quality ◽  
Subsurface Water ◽  
Pearl River ◽  
Surface Microlayer ◽  
The Pearl River

scholarly journals Investigation of Water Quality Parameters from Ramna, Crescent and Hatirjheel Lakes in Dhaka City

2015 ◽  
Vol 8 (1) ◽  
pp. 1-5 ◽  
Author(s):  
MS Islam ◽  
M Rehnuma ◽  
SS Tithi ◽  
MH Kabir ◽  
L Sarkar
Keyword(s):  
Water Quality ◽  
Lake Water ◽  
Public Awareness ◽  
Aquatic Organisms ◽  
Quality Parameters ◽  
Water Runoff ◽  
Dhaka City ◽  
Sound Environment ◽  
Surrounding Areas

The study was conducted to know the status of water quality of the Ramna, Crescent and Hatirjheel lakes in the Dhaka city. Water samples were collected from three different points of each lake and analyzed for various physicochemical parameters including temperature, pH, EC, TDS, DO, BOD, hardness, alkalinity, acidity during the period from November 2013 to April 2014. The mean temperature 22.54, 24.59 and 24.24°C; EC 15400, 282.00 and 618.27 ?Scm-1; TDS 85.38, 155.60 and 339.90 ppm; pH 7.73, 7.85 and 7.67; DO 3.51, 3.92 and 3.65 ppm; BOD 0.93, 0.73 and 3.15 ppm; hardness 95.00, 108.56 and 105.11 ppm; alkalinity 48.9, 120.7 and 249.1 ppm, and acidity 2.18, 2.67 and 2.05 ppm were investigated from Ramna, Crescent and Hatirjheel lakes, respectively. Lower concentration of DO was observed in all three lakes that severely harmed the aquatic organisms and degrade their habitat. The comparative study demonstrated that the concentration of BOD, EC, TDS, alkalinity and acidity of Hatirjheel Lake was higher than Ramna and Crescent lakes which indicated pollution of the lake water. The rain and storm water runoff, lack of awareness of people were responsible for the pollution of Ramna, Crescent and Hatirjheel lakes water. Connection of the sewerage line with the rain water collection channels and mixing of solid waste with lake water are the main reasons for pollution of Hatirjheel lake. Poor water quality of these lakes affects the ecosystem and aesthetic beauty negatively. To maintain the sound environment and healthy ecosystem of the lakes and the surrounding areas need proper management and monitoring and implementation of existing laws and regulations. Moreover public awareness is necessary otherwise it is hardly possible to maintain sound water quality of these three lakes.J. Environ. Sci. & Natural Resources, 8(1): 1-5 2015

Enteric Bacteria Survival Factors

1992 ◽  
Vol 25 (12) ◽  
pp. 93-103 ◽  
Author(s):  
M. Pommepuy ◽  
J. F. Guillaud ◽  
E. Dupray ◽  
A. Derrien ◽  
F. Le Guyader ◽  
...  
Keyword(s):  
Water Quality ◽  
Light Intensity ◽  
Sewage Treatment ◽  
Enteric Bacteria ◽  
Bactericidal Effect ◽  
Mediterranean Coast ◽  
Shellfish Farming ◽  
Two Parameters ◽  
Very High

In order to improve bacterial water quality of shellfish farming areas, studies were conducted in the English Channel (Morlaix) and on the Mediterranean coast (Toulon). These two areas were chosen in order to compare behaviour of fecal bacteria in two different ecosystems. In the estuary of Morlaix sediments are polluted by way of settlement, but most of the bacteria are mixed with turbid waters and are able to survive a very long time (T90 are in a range of several hours to several days). By measuring the increase in salt tolerance of the strains grown in natural organic matter, it was demonstrated that Salmonella can tolerate coastal water salinities. Moreover, because light penetration is prevented by suspended matter, the solar bactericidal effect is very low. On the contrary, through lack of nutrients and very high sunlight intensity, die-off rates in Mediterranean waters are very high (at the surface T90 are less than 2 hours, and several hours in deep waters). A close relationship was found between the light intensity received by bacteria and the T90. Predicted T90 must be found using these two parameters(including turbidity and deep effect on light intensity). The authors suggest that precautions must be taken to carry out impact studies depending on water quality of the area, especially in turbid areas. The knowledge of these mechanisms is very important to evaluate waste water impact on the quality of shellfish farming areas, and to improve elimination of fccal bacteria in sewage treatment plants.

Applying a water quality index model to assess the water quality of the major rivers in the Kathmandu Valley, Nepal

2017 ◽  
Vol 189 (8) ◽  
Author(s):  
Ram Krishna Regmi ◽  
Binaya Kumar Mishra ◽  
Yoshifumi Masago ◽  
Pingping Luo ◽  
Asako Toyozumi-Kojima ◽  
...  
Keyword(s):  
Water Quality ◽  
Water Quality Index ◽  
Quality Index ◽  
Kathmandu Valley ◽  
Index Model

Relationships between epipelic diatoms, aquatic macrophytes, and water quality in Akarçay Stream, Afyonkarahisar, Turkey

2012 ◽  
Vol 41 (1) ◽  
Author(s):  
Mustafa Kargıoğlu ◽  
Ahmet Serteser ◽  
Ersin Kıvrak ◽  
Yılmaz İçağa ◽  
Muhsin Konuk
Keyword(s):  
Water Quality ◽  
Correspondence Analysis ◽  
Diatom Assemblages ◽  
Diatom Indices ◽  
Macrophyte Community ◽  
Epipelic Diatoms ◽  
Central Turkey ◽  
Very High ◽  
Macrophyte Index

AbstractThe Akarçay is the most important stream in the Afyonkarahisar region in central Turkey. In this study, the relationships between epipelic diatoms, macrophytes, and the water quality of Akarçay Stream are presented. According to Canonical Correspondence Analysis (CCA), BOD5, COD, TDS, NH4-N, NO2-N, and PO4-P had the most significant effects on the diatom and macrophyte community structures of the stream. According to CCA and Correspondence Analysis (CA), dominant diatom species and macrophytes constituted two groups, eutrophic and polluted. While eutraphentic taxa were abundant among upstream diatoms, hypereutraphentic taxa were found downstream in the Akarçay. The diatom assemblages in the sites upstream were generally characterized by an abundance of β-mesosaprobous and α-mesosaprobous species, while the diatom assemblages downstream had a very high abundance of polisaprobous species. Eutrophic and hypertrophic macrophyte taxa (such as Lemna trisulca, Potamogeton nodosus, and Ranunculus sp.) covered a high percentage of the stream bottom. Both diatom indices and macrophyte indices with the exception of the Biological Macrophyte Index of Rivers (IBMR) were correlated with BOD5, COD, TDS, NH4-N, NO2-N, PO4-P, and EC. Physicochemical variables, diatom and macrophyte taxa and the results of diatom and macrophyte indices indicated that the Akarçay stream basin is eutrophic and organically polluted.

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