Assessment of spatial-temporal variations in surface water quality of Luzhi river system in Plain River-Net Areas, Suzhou, China

2011 ◽  
Author(s):  
Yu-Hu Zhang ◽  
Hai-feng Jia ◽  
Cong Yang
Keyword(s):  
Water Quality ◽  
Surface Water ◽  
Surface Water Quality ◽  
River System ◽  
Temporal Variations

scholarly journals Evaluation of Spatial and Temporal Variations of Surface Water Quality in the Nile River Damietta Branch

2018 ◽  
Vol 25 (4) ◽  
pp. 569-580
Author(s):  
Wael S. El-Tohamy ◽  
Samar N. ABDEL-Baki ◽  
Nagwa E. Abdel-Aziz ◽  
Abdel-Aziz A. Khidr
Keyword(s):  
Heavy Metals ◽  
Water Quality ◽  
Surface Water ◽  
Critical Index ◽  
Pollution Index ◽  
Surface Water Quality ◽  
River System ◽  
Temporal Variations ◽  
Spatial And Temporal Variations ◽  
Monthly Basis

Abstract The objective of this study is to reveal the spatial and temporal variations of surface water quality in this part of the River Nile with respect to heavy metals pioneerution. Seventeen parameters in total were monitored at seven sites on a monthly basis from October 2013 to September 2014. The dataset was treated using the tools of univariate and multivariate statistical analyses. Cluster analysis showed three different groups of similarity between the sampling sites reflecting the variability in physicochemical characteristics and pollution levels of the study area. Six PCs factors were identified as responsible for the data structure explaining 91 % of the total variance. These were eutrophication factor (23.2 %), physicochemical factor (20.6 %), nutrients (16.3 %) and three additional factors, affected by alkalinity and heavy metals, recorded variance less than 15 % each. Also, the heavy metals pollution index (HPI) revealed that most of the calculated values were below the critical index limit of 100. However, two higher values (124.89 and 133.11) were calculated at sites V and VI during summer due to the temperature and increased run-off in the river system.

Spatiotemporal variation of surface water quality for decades: a case study of Huai River System, China

2013 ◽  
Vol 68 (6) ◽  
pp. 1233-1241 ◽  
Author(s):  
Wei Ji ◽  
Dafang Zhuang ◽  
Hongyan Ren ◽  
Dong Jiang ◽  
Yaohuan Huang ◽  
...  
Keyword(s):  
Water Quality ◽  
Surface Water ◽  
Surface Water Quality ◽  
River System ◽  
Spatiotemporal Variation ◽  
Quality Data ◽  
Main Stream ◽  
Water Quality Data ◽  
Huai River

Characterization of spatiotemporal variation of water quality is a basic environmental issue with implications for public health in China. Trends in the temporal and spatial distribution of water quality in the Huai River System (HRS) were analyzed using yearly surface water quality data collected from 1982 to 2009. Results showed that the water quality of the main stream deteriorated in the 1990s and early 2000s but has been ameliorated since 2005. The sections that were classified as severely polluted from the monitoring data were located largely in the middle reach. The water quality of HRS fluctuated during the period 1997–2009; it has improved and stabilized since 2005. In terms of spatialized frequency of serious pollution, heavily polluted regions were mostly concentrated in the area along several tributaries of the Ying, Guo and New Sui Rivers as well as the area north of Nansi Lake. These regions decreased from 1997 to 2009, especially after 2005. Our analysis indicated that water pollution in HRS had a close relation with population and primary industry during the period 1997–2009, and implied that spatiotemporal variation of surface water quality could provide a scientific foundation for human health risk assessment of the Huai River Basin.

Spatial and Temporal Variations in Surface Water Quality of Pithoragarh District, Uttarakhand (India)

2015 ◽  
Vol 5 (5) ◽  
pp. 267-290 ◽  
Author(s):  
Prashant Singh ◽  
Rajendra Dobhal ◽  
Richa Seth ◽  
Ravinder Singh Aswal ◽  
Rakesh Singh ◽  
...  
Keyword(s):  
Water Quality ◽  
Surface Water ◽  
Surface Water Quality ◽  
Temporal Variations ◽  
Spatial And Temporal Variations

scholarly journals Dynamics of changes in surface water quality indicators of the Western Bug River basin within Ukraine using GIS technologies

2019 ◽  
Vol 42 (1) ◽  
pp. 67-75 ◽  
Author(s):  
Igor Gopchak ◽  
Tetiana Basiuk ◽  
Ihor Bialyk ◽  
Oleg Pinchuk ◽  
Ievgenii Gerasimov
Keyword(s):  
Water Quality ◽  
Surface Water ◽  
Environmental Assessment ◽  
Land Surface ◽  
Surface Water Quality ◽  
Ecological Condition ◽  
Toxic Substances ◽  
Ecological Index ◽  
Gis Technologies

Abstract The environmental assessment of the surface water quality of the Western Bug River has been made using the system of classification quality of land surface water of Ukraine in accordance with the approved methodology, which allows comparing water quality of separate areas of water objects of different regions. The calculation of the environmental assessment of water quality has been carried according to three blocks: block of salt composition, block of trophic and saprobic (ecological and sanitary) indicators and block of indicators of content of specific toxic substances. The results are presented in the form of a combined environmental assessment, based on the final conclusions of the three blocks and consists in calculating the integral ecological index. Comprehensive studies of changes in the water quality of the Western Bug River have been conducted within the territory of Ukraine for a long-term period. The water quality of the river on the final values of the integral indicators of the ecological condition corresponded mainly to 4nd category of the 3rd class – the water is “satisfactory” by condition and “little polluted” by degree of purity (except for points of observation that located within the Volyn region, where the water quality corresponded to 3rd category and the 2nd class. It is “good” by condition and “fairly clean” by the degree of purity). Visualization and part of the analysis are performed using GIS technologies in the software of the ArcGIS 10.3.

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