scholarly journals ENVIRONMENTAL ASSESSMENT OF WATER QUALITY IN THE ONEGO LAKE URBAN TRIBUTARY BY CHEMICAL INDICATORS

2021 ◽  
Vol 26 (3) ◽  
pp. 75-84
Author(s):  
E. V. Tekanova ◽  
◽  
E. M. Makarova ◽  
N. M. Kalinkina ◽  
◽  
...  
Keyword(s):  
Water Quality ◽  
River Water ◽  
Urban Areas ◽  
Oxygen Demand ◽  
Total Iron ◽  
Oil Products ◽  
Water Color ◽  
Chemical Indicators ◽  
Maximum Permissible Concentrations ◽  
The City

Introduction. The Lososinka River is an urban tributary of Lake Onego, the lower reaches of which flow through the territory of Petrozavodsk city, receiving untreated drains of the city’s storm sewers. The river enters the Petrozavodsk Bay of Lake Onego, which is used as a source of public drinking water supply in the city. Methods. During the 2015 open water period, the oxygen concentration, total iron, color, pH, total suspended matter, biochemical oxygen demand (BOD5), content of oil products, and dichromate chemical oxygen demand were measured by standard methods in the water of the background and urban areas of the Lososinka River. Results. In the river water, high values of water color (132 mg/l Cr-Co), total iron (1.5 mg/l), dichromate chemical oxygen demand (23 mgO/l) were revealed, which is associated with the geochemical peculiarities of the surface waters in Karelia, enriched in the humic matter. Seasonal increases in the concentrations of these indicators were associated with floods. The oxygen saturation of the water reached 90% due to the fast current and riffles. The indicators of water pollution include total phosphorous (60 μg/l), mineral phosphorous (40 μg/l), BOD5 (1.5 mgO2/l), suspended matter (25.5 mg/l), and content of oil products (0.02 mg/l). Seasonal changes in these indicators were not associated with the hydrological regime of the river. In the storm sewers of the city, the maximum permissible concentrations for BOD5 are exceeded by 4 times, and for oil products — by 15 times. The Kruskal–Wallis test showed that all the studied chemical indicators in the urban and background areas of the river do not have significant differences. Conclusion. Water quality in the Lososinka River is considered satisfactory in terms of most of the studied parameters. According to the total iron content, the water is characterized as polluted, and according to water color, the river water is classified as dirty. The maximum permissible concentrations for total iron in the background and urban areas of the river were exceeded by 10 times. The standards for water quality adopted in the Russian Federation and the maximum permissible concentrations for total iron and water color are inapplicable for the water bodies in Karelia with high background values of these indicators. The trophic status of the river corresponds to the eutrophic state. Good saturation of the river water with oxygen hinders water pollution in the city territory due to self-purification processes.

Survey of the Ecological State of Eight Man-Made Lakes Within the City Limits of Freiburg, Germany

1992 ◽  
Vol 27 (2) ◽  
pp. 301-310
Author(s):  
Agnes G. Pulvermüller ◽  
Heidulf E. Müller
Keyword(s):  
Escherichia Coli ◽  
Water Quality ◽  
Biochemical Oxygen Demand ◽  
Secchi Depth ◽  
Oxygen Demand ◽  
Ecological Condition ◽  
Ecological State ◽  
Biological Parameters ◽  
The City ◽  
Oxygen Profiles

Abstract The survey of the ecological condition of eight lakes within the city limits of Freiburg included hydrochemical measurements and analyses (oxygen profiles, Secchi depth, pH, biochemical oxygen demand) together with biological parameters (chlorophyll a, phytoplanktonbiomass, Escherichia coli counts), as well as parasitic examinations. Only some of the investigated parameters are presented here. Seven of the eight lakes were found to be eutrophic. The process of eutrophication appears to be still in progress. One lake can be considered to be hypertrophic. Schistosome dermatitis was observed. The water quality in general was considered to be acceptable; suggestions to maintain or improve the water quality are made.

Analysis of water pollution and evaluation of purification measures in an urban river basin

1996 ◽  
Vol 34 (12) ◽  
pp. 33-40 ◽  
Author(s):  
Y. Hosoi ◽  
Y. Kido ◽  
H. Nagira ◽  
H. Yoshida ◽  
Y. Bouda
Keyword(s):  
Water Quality ◽  
River Water ◽  
River Basin ◽  
Urban Areas ◽  
River Flow ◽  
Sea Water ◽  
Water Quality Management ◽  
River Water Quality ◽  
Urban River ◽  
Pollutant Load

The inflow of pollutant load from urban areas and the stagnation of water due to sea water intrusion cause the deterioration of river water quality in tidal zone. In order to improve water quality, various measures such as the reduction of pollutant load by sewage systems, discharge control from sewage treatment plants considering river flow, nutrient removal by aquatic plants, and the dredging of bottom sediments have been examined. The choice of these measures depends on the situation of the river environment and finances. In this study, a field survey was carried out in a typical urban river basin, first. Secondly, on the basis of this survey, a mathematical model was formed to simulate flow and water quality. Several purification alternatives designed for the investigated river basin were comparatively evaluated from the viewpoint of the effect of water quality improvement and their cost. Finally, they were prioritized. Through this case study, a planning process of river water quality management was shown.

scholarly journals ANALISIS KUALITAS AIR SUNGAI SARIO KECAMATAN SARIO MANADO SULAWESI UTARA

2016 ◽  
Vol 16 (1) ◽  
pp. 19
Author(s):  
Gorby Corneles Tarima ◽  
Jemmy Abidjulu ◽  
Harry S.J. Koleangan
Keyword(s):  
Water Quality ◽  
River Water ◽  
Chemical Properties ◽  
Quality Standard ◽  
River Water Quality ◽  
Water Quality Standard ◽  
Community Activities ◽  
North Sulawesi ◽  
Physical And Chemical ◽  
The City

ANALISIS KUALITAS AIR SUNGAI SARIO KECAMATAN SARIO MANADO  SULAWESI UTARAABSTRAK Penelitian ini dilakukan untuk menganalisis kualitas air sungai Sario berdasarkan sifat fisika dan kimia sesuai dengan PP No 82 Tahun 2001. Penelitian dilakukan di laboratorium Baristand Industri Manado pada bulan November 2015, dengan 4 sampel air yang diambil pada 4 titik dari hulu sampai hilir sungai Sario Kota Manado menggunakan 7 parameter yaitu kekeruhan, pH, nitat, nitrit, BOD, COD dan DO. Hasil penelitian ini menunjukkan bahwa kualitas air sungai Sario yang sesuai dengan ambang baku mutu air berdasarkan PP No. 82 Tahun 2001 hanyalah pada bagian hulu sampai tengah Sungai sebelum memasuki wilayah Kota Manado, sedangkan pada sekitaran hilir sungai Sario telah tercemar yang berhubungan dengan aktivitas masyarakat dengan diindikasikan berdasarkan konsentrasi BOD, COD dan DO yang buruk dan tidak sesuai dengan ambang baku mutu air berdasarkan PP No. 82/2001. Kata kunci : Kualitas Air, Sungai Sario   ANALYSIS OF RIVER WATER QUALITY SARIO DISTRICT MANADO  NORTH SULAWESI ABSTRACT This study was conducted to analyze the Sario river water quality based on physical and chemical properties in accordance with PP No. 82 of 2001. The study was conducted in laboratory Baristand Industry Manado in November 2015, with four water samples taken at 4 points from upstream to downstream Sario City Manado using 7 parameters: turbidity, pH, nitat, nitrite, BOD, COD and DO.  The results of this study indicate that the water quality in accordance with the Sario river water quality standard threshold under PP No. 82 of 2001 only on the upstream side to the middle of the river before entering the city of Manado, whereas the downstream Area Sario river has been polluted related community activities to be indicated by the concentration of BOD, COD and DO poor and not in accordance with the water quality standard threshold based PP No. 82 of 2001. Keywords: Water Quality, River Sario

scholarly journals Assessment of the water pollution level and the environmental status of rivers in the Siverskyi Donets basin by BOD5

2020 ◽  
pp. 91-101
Author(s):  
N. S. Loboda ◽  
І. V. Katynska ◽  
О. V. Smalii
Keyword(s):  
Water Quality ◽  
River Water ◽  
Catchment Area ◽  
Donets Basin ◽  
Pollution Level ◽  
Early 21St Century ◽  
Main River ◽  
Environmental Status ◽  
The City ◽  
Hydrochemical Index

The paper topicality consists in the necessity for determination of the environmental status of the rivers in the Siverskyi Donets Basin and assessment of the possibilities for them to achieve ‘good environmental status’ under the modern climatic conditions and the anthropogenic load. Siverskyi Donets is the main river in the Eastern Ukraine. There are large industrial zones at the water catchment area. Among them, there are the Donetsk Coal Basin and the industrial complexes within the City of Kharkiv, which have exerted influence on surface water quality for decades. A method for assessment of the pollution level and the environmental status of waters by the hydrochemical index of BOD5 (biochemical oxygen demand for 5 days) is used in the paper. The paper is aimed at identification of the main trends in water quality changes by hydrochemical index of BOD5. The object of research is a pollution of the rivers at the Siverskyi Donets Basin by industrial, municipal and mine wastewaters. The subject of research is an assessment of water qualitative status by BOD5. The hydrochemical observation data for 7 gauges at the main river and 7 tributaries for the period of 1990-2015 were used in the paper. The major attention is focused on the most polluted rivers in the Eastern Ukraine: the Udy and the Kryvyi Torets. The quality of the Udy River water is largely determined by the municipal wastewater from Kharkiv. The Kryvyi Torets River belongs to the Donbas rivers, where pollution by mine water and wastewater from industrial enterprises is significant. Pollution levels, environmental status and saprobity were determined by the average annual indices of BOD5. Empirical probabilities for occurrence of a certain pollution parameter at various gauges were calculated for comparative analysis. It is found that a BOD5 downward trend has been prevalent on the rivers at the Siverskyi Donets catchment area in the early 21st century. The highest BOD5 values were observed on the Donbas tributaries and the Udy River (downstream from the City of Kharkiv), as well as upstream and downstream from Lysychansk, and the lowest ones were observed on the Oskil River. It is also revealed that in the early 21st century, the main river water has a ‘threshold’ environmental status (β-mesosaprobic zone), except for the Lysychansk gauge, where the status is ‘irreversibly altered’ owing to the inflow of polluted water from Donbas rivers into the Siverskyi Donets. Research into the Udy River water quality upstream and downstream from the industrial city of Kharkiv has shown that the water in the upper reaches of this river is classified as ‘clean’ and ‘moderately polluted’, and the environmental status may become ‘good’ in the future. Downstream from the city, the water is mostly ‘dirty’, and the environmental status is ‘irreversibly altered’, which corresponds to the α-mesosaprobic zone. For the Kryvyi Torets River (the Donbas Region), owing to the impact of organic pollution, the environmental status is defined as ‘threshold’, ‘irreversibly altered’ and it has begun to deteriorate in recent years. To improve the environmental status of the Donbas rivers, the reduction in discharges of untreated municipal and industrial wastewater into surface watercourses, as well as the construction of state-of-the-art sewage treatment plants are necessary.

scholarly journals URBAN GROWTH AND WATER QUALITY IN THIMPHU, BHUTAN

2013 ◽  
pp. 82-95 ◽  
Author(s):  
Nandu Giri ◽  
O. P. Singh
Keyword(s):  
Water Quality ◽  
Urban Area ◽  
Water Samples ◽  
Urban Areas ◽  
Forest Cover ◽  
Rapid Development ◽  
Oxygen Demand ◽  
Capital City ◽  
Quality Data ◽  
Water Quality Data

Detailed study was undertaken in 2008 and 2009 on assessment of water quality of River Wang Chhu which flows through Thimphu urban area, the capital city of Bhutan. The water samples were examined at upstream of urban area, within the urban area and its downstream. The water samples were analyzed by studying the physico-chemical, biological and benthic macro-invertebrates. The water quality data obtained during present study are discussed in relation to land use/land cover changes(LULC) and various ongoing human activities at upstream, within the each activity areas and it’s downstream. Analyses of satellite imagery of 1990 and 2008 using GIS revealed that over a period of eighteen years the forest, scrub and agricultural areas have decreased whereas urban area and road network have increased considerably. The forest cover, agriculture area and scrub decreased from 43.3% to 42.57%, 6.88% to 5.33% and 42.55% to 29.42%, respectively. The LULC changes effect water quality in many ways. The water temperature, pH, conductivity, total dissolved solids, turbidity, nitrate, phosphate, chloride, total coliform, and biological oxygen demand were lower at upstream and higher in urban area. On the other hand dissolved oxygen was found higher at upstream and lower in urban area. The pollution sensitive benthic macro-invertebrates population were dominant at upstream sampling sites whereas pollution tolerant benthic macro-invertebrates were found abundant in urban area and its immediate downstream. The rapid development of urban infrastructure in Thimphu city may be posing serious threats to water regime in terms of its quality. Though the deterioration of water quality is restricted to a few localized areas, the trend is serious and needs proper attention of policy planners and decision makers. Proper treatment of effluents from urban areas is urgently needed to reduce water pollution in such affected areas to check further deterioration of water quality. This present study which is based on upstream, within urban area and downstream of Thimphu city can be considered as an eye opener.

scholarly journals Physicochemical Parameters of Gomati River at Lucknow in Uttar Pradesh (India)

2021 ◽  
Vol 9 (VII) ◽  
pp. 875-886
Author(s):  
Azad Kannaujiya
Keyword(s):  
Water Pollution ◽  
Water Quality ◽  
River Water ◽  
Industrial Effluent ◽  
Oxygen Demand ◽  
Total Hardness ◽  
Domestic Waste ◽  
Aquatic Life ◽  
Gomati River ◽  
The Impact

Gomati River originate from Madhoganj Tanda village in Pilibhit district, U.P. it passes through the district of Shahjahanpur, kheri, Hardoi, Sitapur, Janpur and ultimately merge in Ganga. River water is significant for every living organism as well as aquatic life. Water pollution is a major global problem. Modernization and urbanization have polluted the river water and degraded the status. All over the world we are seeing that drain is the main source of water pollution especially for rivers flowing within the city. This drain generally carries industrial effluent, domestic waste, sewage and medicinal waste resulting in poor water quality. Gomati River receives industrial as well as domestic waste from various drains of Lucknow city. As Gomati river is the only source of surface water near the communities. A total 20 parameters namely Temperature, pH, Turbidity, Conductivity, Total dissolved solids (TDS), Total suspended solids (TSS), Total solids (TS), Dissolved oxygen (DO), Biological oxygen demand (BOD) Chemical oxygen demand (COD), Alkalinity, Total hardness, Calcium as ca, Magnesium as Mg, Chloride, Fluoride, Sulphate as So4, Nickel as Ni, Lead as Pb, and Zinc as Zn where analysed and their variation is discussed to obtain the impact of effluents on water quality. From the result it was found higher than the permissible limit of WHO and BIS.

scholarly journals Role of humic substances as refractory organic matter in sustainable water quality assessment and management

2019 ◽  
Vol 20 (2) ◽  
pp. 538-549
Author(s):  
Maoqing Duan ◽  
Xia Du ◽  
Wenqi Peng ◽  
Cuiling Jiang ◽  
Shijie Zhang
Keyword(s):  
Water Quality ◽  
Chemical Oxygen Demand ◽  
Humic Substances ◽  
River Water ◽  
Anthropogenic Activities ◽  
Water Quality Management ◽  
National Development ◽  
Oxygen Demand ◽  
Study Results ◽  
The Impact

Abstract In northern China, river water originating from or flowing through forests often contains large amounts of oxygen-consuming organic substances, mainly humic substances. These substances are stable and not easily biodegradable, resulting in very high detection values of chemical oxygen demand. However, under natural conditions, the dissolved oxygen demand is not as high. Using experimental values to evaluate river water quality and the impact of human activities on water quality is thus unscientific and does not meet national development goals. In this study, the potential sources of high-concentration chemical oxygen demand in river water in two areas exposed to virtually no anthropogenic activities and strongly affected by humic substances, were analysed. The chemical oxygen demand contributed by humic substances (COD-HSs) was quantified using three methods. The results of water quality monitoring in 2017 and 2018 revealed that the chemical oxygen demand concentrations (5–44 mg/L) predominantly exceeded the standard (15 mg/L). The study results suggest that COD-HSs should be considered separately for objective evaluation and management of water quality, particularly in areas that are seriously affected by COD-HSs, to provide a scientific basis for formulating sustainable water quality management policies.

scholarly journals A study of the quality and hygienic conditions of spring water in Mongolia

2007 ◽  
Vol 6 (1) ◽  
pp. 141-148 ◽  
Author(s):  
Altanzagas Badrakh ◽  
Tsolmon Chultemdorji ◽  
Robert Hagan ◽  
Salik Govind ◽  
Tsevegdorj Tserendorj ◽  
...  
Keyword(s):  
Water Quality ◽  
Central Region ◽  
Rural Areas ◽  
Urban Areas ◽  
Oxygen Demand ◽  
Spring Water ◽  
World Health ◽  
Low Flow ◽  
Microbial Count ◽  
Hygienic Conditions

An assessment on quality and hygienic conditions of spring water was undertaken in Mongolia in 2004 with financial and technical support from the World Health Organization through AGFUND. Methodology: A total of 127 springs, 99 from rural areas and 28 from Ulaanbaatar city were included in the study. The study included hygienic conditions, physical, microbiological and chemical parameters of springs. Based on the results of laboratory analysis, the quality of springs were classified into five degrees of contamination. Results: The majority of springs studied and especially in UB city and the Central region had poor hygienic conditions such as low flow rate, turbidity or pollution sources in the vicinity of springs. 78% of the total studied springs did not have any protection or upgrade and 22% have only wooden, iron and stone fences. The water quality parameters such as hardness, total dissolved solids, oxygen demand, nitrogenous compounds, total microbial count, Escherichia coli were also significantly higher in springs located in UB city, the Central region and the East region. 47.6% of all studied aimag's (countryside) spring water were significantly polluted by more than three parameters especially E. coli, ammonia, oxygen demand, which indicated a recent contamination by human and animal excreta in water. Conclusion: The current study revealed that the majority of springs in peri urban areas close to UB city and the Central region had poor hygienic conditions. Different levels of contamination using both microbiological and chemical tests were found in studied springs. It is recommended that regular assessment of spring water quality be undertaken to create awareness among communities and local authorities for further protection and upgrading of spring water sources.

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