scholarly journals On the issue of the Uzbekistan surface water quality assessment

2019 ◽  
Author(s):  
Keyword(s):  
Water Quality ◽  
Drinking Water ◽  
Surface Water ◽  
Surface Waters ◽  
Surface Water Quality ◽  
Water Quality Assessment ◽  
Soviet Period ◽  
Hazard Class ◽  
Difficult Situation

The article is devoted to the analysis of the quality of surface water in Uzbekistan. Analyzed their impact on the living conditions and health of the population of the republic. The most difficult situation with drinking water supply and with the growth of diseases caused by the use of poor-quality drinking water falls on the Navoi, Khorezm, Surkhandarya regions and Karakalpakstan. The stated data makes it relevant to conduct research to determine the quality of surface waters and improve the methods of its assessment. The analysis of existing methods for assessing the quality of surface waters. The technique of assessment of the index of pollution of water applied now in Uzbekistan counted in compliance with “Methodical recommendations about the formalized complex evaluation test of the surface and ocean waters about hydro/chemical indexes” was developed in Soviet period and doesn’t meet the modern requirements. The need to improve the methods for assessing the quality of surface waters as compared with that currently used in Uzhydromet is indicated. One of the most promising at present is the “Method of integrated assessment of the degree of contamination of surface waters by hydro/chemical indicators” developed and used in operational practice in Russia. The most informative comprehensive estimat water pollution and the class of water quality. The author proposed methods for assessing the quality of surface waters, the calculation of which is based on the use of a larger amount of initial information and are more reliable than those used. In particular, the proposed methodology for assessing the quality of surface waters, taking into account the hazard class of ingredients.

Surface Water Quality Assessment in Beijing (China) Using GIS-Based Mapping and Multivariate Statistical Techniques

2014 ◽  
Vol 955-959 ◽  
pp. 1514-1526
Author(s):  
Lian Fang Li ◽  
Xi Bai Zeng ◽  
Guo Xue Li ◽  
Xu Rong Mei
Keyword(s):  
Water Quality ◽  
Surface Water ◽  
Surface Water Quality ◽  
Water Quality Assessment ◽  
Multivariate Statistical ◽  
The Public ◽  
Weathering Processes ◽  
Natural Processes ◽  
Beijing China

The quality of surface water is a matter of serious concern nowadays. The surface water quality in a region is mainly determined both by the natural processes (precipitation rate, weathering processes, soil erosion) and the anthropogenic influences including urban, industrial and agricultural activities and increasing exploitation of water resources [1-. Since surface water in an area is often used for drinking, industrial, agriculture, recreation or other purposes. It is necessary to assess the water quality correctly to afford timely information to the public for satisfying peoples needs of production and daily life.

scholarly journals Surface water quality of small rivers in the Ukrainian regions of right-bank Polissia

2021 ◽  
Vol 280 ◽  
pp. 10005
Author(s):  
Igor Gopchak ◽  
Tеtiana Basiuk ◽  
Artem Yatsyk ◽  
Oksana Yaromenko
Keyword(s):  
Water Quality ◽  
Surface Water ◽  
Surface Waters ◽  
Surface Water Quality ◽  
Ecological Condition ◽  
Small Rivers ◽  
Protection Measures ◽  
Ecological Index ◽  
Satisfactory Condition

The quality of surface waters of small rivers of the Ukrainian regions of right-bank Polissia, belonging to the basin of the river Pripyat, was estimated. The study was conducted via systematic observations based on the ecological classification of surface water quality of land and estuaries of Ukraine, which includes a set of hydrophysical, hydrochemical, hydrobiological and other indicators, which were grouped into three blocks of indicators: salt composition of water; tropho-saprobiological (ecologicalsanitary) block; specific substances of toxic action. The integrated (ecological) index was determined, by which the class and category of surface water quality were established. The results of observations on the quality of surface waters of the rivers of the Ukrainian regions of right-bank Polissia indicate their satisfactory condition. Surface waters, on average, correspond to the II class of water quality, and the worst - to the III class. Water protection measures have been proposed to improve the ecological condition of small river basins in specified region.

scholarly journals Surface Water Quality Assessment, Prediction & Modelling of River Daya in Odisha

2022 ◽  
Author(s):  
Pramod Jena ◽  
*Sayed Modinur Rahaman ◽  
Pradeep Kumar DasMohapatra ◽  
Durga Prasad Barik ◽  
Dikshya Surabhi Patra
Keyword(s):  
Water Quality ◽  
Surface Water ◽  
Decision Tree ◽  
Surface Water Quality ◽  
Water Quality Assessment ◽  
Total Coliform ◽  
Geographic Region ◽  
Total Hardness ◽  
Good Tool

Abstract A decision tree -based approach is projected to predict surface water quality and is a good tool to assess quality and guarantee property safe use of water for drinking. The most objective of this study is to assess the surface water quality of the Daya watercourse to work out the quality of drinking functions. Samples were collected from designated locations throughout totally different seasons (winter, summer, rainy) over a amount of five years (2016, 2017, 2018, 2019, and 2020). Total dissolved solids, pH, alkalinity, chloride, nitrate, total hardness, calcium, magnesium, iron, fluoride, were all tested as well as total coliform, fecal coliform, and E. coli. The main goal is to use decision tree regression to construct a model to assess and predict water quality changes in the Daya geographic region of Odisha, India, and compare it to statistical methods.

scholarly journals Surface Water Quality Assessment Using Phytoplankton and Zoobenthos: A Case Study at Bung Binh Thien, An Giang Province, Vietnam

2020 ◽  
Vol 12 (1) ◽  
pp. 7-16
Author(s):  
Thanh Giao NGUYEN
Keyword(s):  
Water Quality ◽  
Surface Water ◽  
Diversity Index ◽  
Surface Water Quality ◽  
Water Quality Assessment ◽  
Diversity Indices ◽  
Average Score ◽  
Species Diversity Index

The study aimed to evaluate water quality at Bung Binh Thien Lake, An Giang Province, Vietnam using Shannon-Wiener species diversity index (H’) and associated average score per taxon (ASPT) calculated from composition of phytoplankton and zoobenthos. The water quality index (WQI) was used as the reference for the quality of surface water. The samples of surface water quality, phytoplankton, and zoobenthos were simultaneously collected at 11 sites in the dry season. The results showed that WQI (57-88) classified water quality from good to medium, H’ calculated using phytoplankton species (1.12-2.71) presented water quality from medium to bad whereas, (H'z) calculated (0 to 2.07) and ASPT (2-4.21) calculated from zoobenthos species divided water quality from bad to very bad. The findings revealed that assessing water quality should not totally only relied on diversity indices (H’, ASPT) but also carefully consider compositions of phytoplankton and zooplankton. In addition, interpretation of the biodiversity indices for water quality examination should involve the experts in the relevant fields. Nghiên cứu nhằm đánh giá chất lượng nước tại hồ Bung Binh Thiên, tỉnh An Giang, Việt Nam sử dụng chỉ số đa dạng loài Shannon-Wiener (H’) và chỉ số tính điểm trung bình bình theo họ (ASPT) được tính từ thành phần của phiêu sinh thực vật và động vật đáy. Chỉ số chất lượng nước (WQI) được sử dụng tham chiếu cho chất lượng nước mặt. Các mẫu chất lượng nước mặt, phiêu sinh thực vật thực vật và động vật đáy được thu đồng thời tại 11 địa điểm trong mùa khô. Kết quả cho thấy WQI (57-88) phân loại chất lượng nước từ tốt đến trung bình, H’p được tính dựa vào các loài phiêu sinh thực vật (1.12-2.71) thể hiện chất lượng nước từ trung bình đến xấu trong khi, H’z (0- 2.07 ) và ASPT (2-4,21) được tính toán từ các loài động vật đáy phân loại chất lượng nước từ xấu đến rất xấu Kết quả nghiên cứu cho thấy đánh giá chất lượng nước không chỉ hoàn toàn dựa vào các chỉ số đa dạng (H’, ASPT) mà còn xem xét cẩn thận thành phần loài của phiêu sinh thực vật và động vật đáy. Ngoài ra, việc giải thích các chỉ số đa dạng sinh học nhằm tra chất lượng nước cần có sự tham gia của các chuyên gia trong các lĩnh vực liên quan.

scholarly journals EVALUATING THE POSSIBLE USE OF PHYTOPLANKTON AND ZOOBENTHOS FOR WATER QUALITY ASSESSMENT: A CASE STUDY AT BUNG BINH THIEN RESERVOIR, AN GIANG PROVINCE, VIET NAM

2020 ◽  
Vol 1 (36) ◽  
pp. 39-50
Author(s):  
Giao Thanh Nguyen
Keyword(s):  
Water Quality ◽  
Surface Water ◽  
Diversity Index ◽  
Surface Water Quality ◽  
Water Quality Assessment ◽  
Diversity Indices ◽  
Average Score ◽  
Viet Nam ◽  
Species Diversity Index

The study aimed to evaluate water quality at Bung Binh Thien Reservoir, in An Giang Province, Viet Nam using Shannon-Wiener species diversity index (H’) and associated average score per taxon (ASPT) calculated from composition of phytoplankton and zoobenthos. The water quality index (WQI) was used as the reference forthe quality of surface water. The samples of surface water quality, phytoplankton, and zoobenthos were simultaneously collected at 11 sites during the dry season. The results showed that WQI (57-88) classified waterquality from good to medium, H’ calculated using phytoplankton species (1.12-2.71) presented water quality from medium to bad where as, H’z calculated (0 to 2.07) and ASPT (2-4.21) calculated from zoobenthos species divided water quality from bad to very bad. The findings revealed that assessing water quality should not totally rely on diversity indices (H’, ASPT), but compositions of phytoplankton and zooplankton should also be taken into consideration.

scholarly journals ECOLOGICAL ASSESSMENT OF SURFACE WATER QUALITY OF ROSTAVYTSIA RIVER

2020 ◽  
pp. 86-92
Author(s):  
Pavlo Smilii ◽  
Mykhailo Melniychuk
Keyword(s):  
Water Quality ◽  
Surface Water ◽  
Quality Indicators ◽  
Environmental Assessment ◽  
Surface Waters ◽  
Ecological Status ◽  
Surface Water Quality ◽  
Ecological Assessment ◽  
Salt Composition

Purpose – perform ecological assessment of the surface waters of the Rostavytsia river within the Zhytomyr region. Method. Environmental assessment of the surface water of the Rostavytsia river was carried out using the system of classification of standards for the assessment of surface water quality of Ukraine. On the basis of common environmental criteria, the methodology makes it possible to compare the quality of water at different sites of water bodies, in water bodies of different regions. The calculation of the ecological assessment of water quality was carried out within three blocks: block of salt composition (І1), block of trophic-saprobiological (ecological-sanitary) indicators (І2) and block of indicators of content of specific substances of toxic action (І3). The results are presented in the form of a combined environmental assessment based on the final conclusions of the three blocks and based on the calculation of the integrated environmental index (IE). Results. Omprehensive studies on changing the water quality of the Rostavytsia river were conducted within the Zhytomyr region during 2016-2017. The water quality of the river according to the final values of the integral indicators of water quality of the three blocks varies within the II and III quality classes. The total environmental indices (IE) for the mean and worst indices are 3,2 and 3,3 respectively. In general, the water quality along the main channel of the Rostavytsia river within the Zhytomyr region corresponds to the second class, 3 categories, 3 subcategories according to the average quality indicators and 3(4) subcategories by worst performance. The total values of the integral surface water quality indicators of the Rostavytsia river indicate their contamination by trophic-saprobiological components. Scientific novelty. For the first time, on the basis of analytical studies and stock materials, an ecological assessment of the surface waters of the Rostavytsia river within the Zhytomyr region was carried out by three blocks of indicators: salt composition, trophic-saprobiological indicators and specific toxic substances. The integral ecological index is determined. The trends of pollutants accumulation in the surface waters of the Rostavytsia river have been established. Practical significance. The conducted researches allowed to analyze and evaluate the ecological status of the surface waters of the Rostavytsia river within the Zhytomyr region, which will allow to establish ecological standards of water quality and on this basis to determine the main directions for improvement of water resources and to substantiate the system of recommendations aimed at improving the ecological status of the studied basin.

scholarly journals Analysis and forecast of the ecological conditions of surface water in Uzbekistan

2020 ◽  
Vol 26 (1) ◽  
pp. 242-256
Author(s):  
Bakhtiyor Kurbanov ◽  
Azimjon Primov ◽  
Bobir Kurbanov
Keyword(s):  
Water Quality ◽  
Surface Water ◽  
Surface Waters ◽  
High Surface ◽  
Surface Water Quality ◽  
Actual State ◽  
Source Information ◽  
Maximum Permissible Concentrations ◽  
The Republic

In the Republic of Uzbekistan, an increasing shortage of water resources and insufficient supply of clean drinking water is forcing the population to use river water for domestic and drinking needs. Moreover, the health of the population largely depends on the quality of surface waters. This fact makes it relevant to monitor surface water, identify areas with high pollution, identify the most dangerous ingredients for the health of the population and take measures to minimize them. The hydrometeorological service of the Republic of Uzbekistan currently uses a methodology for assessing the quality of surface water that was developed back in 1988 and does not meet modern requirements. For this reason, in the operational practice of Russia since 2002, the “Method of a comprehensive assessment of the degree of pollution of surface waters by hydrochemical indicators” has been used, which is more promising. A method for assessing the quality of surface water is proposed, based on an analysis of the source information for all gauging stations and ingredients. This article presents the results of the development of a map of hydroecological zoning based on materials for 1997–2006 and a forecast map of hydroecological zoning for 2015. The forecast is based on hydrochemical data, which included information on the hydrochemical composition of surface waters for 1997–2006 for all posts of the republic. According to the research results, areas with increased pollution of surface water and ingredients with a significant excess of maximum permissible concentrations were identified. Among them, mercury occupies a special place. A comparative analysis of the forecast map with a map of the actual state of surface water quality, developed by us based on the materials of the hydrometeorological service of the Republic of Uzbekistan for 2014–2015, is carried out. The analysis showed a good agreement between the forecast data on the location of areas with unsatisfactory surface water quality and the actual materials, which makes it possible to use a forecast map to identify problem areas with high surface water pollution. Studies have revealed the need for high-quality laboratory chemical analyzes of water for all the ingredients included in the database of the hydrometeorological service of the Republic of Uzbekistan. In this case, special attention should be paid to such highly toxic ingredients as mercury. Urgent measures must be taken to inventory mercury sources in surface waters and measures should be developed to minimize its release.

scholarly journals ECOLOGICAL ASSESSMENT OF THE SURFACE WATER QUALITY OF THE GUYVA RIVER

2020 ◽  
pp. 52-57
Author(s):  
Pavlo Smilii
Keyword(s):  
Water Quality ◽  
Surface Water ◽  
Quality Indicators ◽  
Environmental Assessment ◽  
Surface Waters ◽  
Ecological Status ◽  
Surface Water Quality ◽  
Ecological Assessment ◽  
Salt Composition

Method. Environmental assessment of the surface water of the Guyva River was carried out using the system of classification of standards for the assessment of surface water quality of Ukraine. On the basis of common environmental criteria, the methodology makes it possible to compare the quality of water at different sites of water bodies, in water bodies of different regions. The calculation of the ecological assessment of water quality was carried out within three blocks: block of salt composition (І1), block of trophic-saprobiological (ecological-sanitary) indicators (І2) and block of indicators of content of specific substances of toxic action (І3). The results are presented in the form of a combined environmental assessment based on the final conclusions of the three blocks and based on the calculation of the integrated environmental index (IE). Results. omprehensive studies on changing the water quality of the Guyva River were conducted within the Zhytomyr region during 2016-2017. The water quality of the river according to the final values of the integral indicators of water quality of the three blocks varies within the II and III quality classes. The total environmental indices (IEs) for the mean and worst indices are 2,9 and 3,1 respectively. In general, the water quality along the main channel of the Guyva River within the Zhytomyr region corresponds to the second class, 3 categories, 3(2) subcategories according to the average quality indicators (in the state of "good" with a slope to "very good", in terms of purity bias to "clean") and 3 subcategories by worst performance (good for good, clean enough). The total values of the integral surface water quality indicators of the Guyva River indicate their contamination by trophic-saprobiological components. Scientific novelty. For the first time, on the basis of analytical studies and stock materials, an ecological assessment of the surface waters of the Guyva River within the Zhytomyr region was carried out by three blocks of indicators: salt composition, trophic-saprobiological indicators and specific toxic substances. The integral ecological index is determined. The trends of pollutants accumulation in the surface waters of the River Guyva have been established. Practical significance. The conducted researches allowed to analyze and evaluate the ecological status of the surface waters of the Guyva River within the Zhytomyr region, which will allow to establish ecological standards of water quality and on this basis to determine the main directions for improvement of water resources and to substantiate the system of recommendations aimed at improving the ecological status of the studied basin.

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