scholarly journals Identification of the self-purification stretches of the Pinios River, Central Greece

2007 ◽  
Vol 8 (2) ◽  
pp. 19 ◽  
Author(s):  
Y. CHATZINIKOLAOU ◽  
M. LAZARIDOU
Keyword(s):  
Water Quality ◽  
River Basin ◽  
Industrial Waste ◽  
The Self ◽  
Benthic Macroinvertebrate ◽  
Agricultural Pollution ◽  
Biotic Indices ◽  
Central Greece ◽  
Pinios River ◽  
Basin Water

The Pinios River basin in Thessaly, Greece, is intensively farmed and heavily polluted with poorly treated domestic and industrial waste. The river was divided into 35 homogenous stretches. We investigated the self-purification capacity along the different stretches of the Pinios based on the responses of the benthic macroinvertebrate community to municipal, industrial and agricultural pollution in the basin. Water quality was assessed by the performance of six diversity and biotic indices and scores for assessing water quality. Self-purification found by the downstream amelioration of water quality was evident at five stretches. These stretches should be safeguarded and priority should be given to restoration projects along the most water-quality-degraded stretches that lack the capacity for self-purification.

Applying Probabilistic Water Quality Standards in River Basin Water Quality Optimization Models

1974 ◽  
Vol 9 (1) ◽  
pp. 25-29
Author(s):  
M. B. Bayer
Keyword(s):  
Water Quality ◽  
River Basin ◽  
Treatment Plant ◽  
Oxygen Demand ◽  
Minimum Cost ◽  
Water Quality Standards ◽  
Quality Optimization ◽  
Basin Water ◽  
Do Concentration ◽  
Water Quality Models

Abstract This paper describes a method of applying probabilistic DO (dissolved oxygen) and BOD (biochemical oxygen demand) standards in river basin water quality models. Maximum likelihood estimators for the DO and BOD concentrations variances for each reach are used to obtain a lower bound for BOD so that the probability of violating specified DO and BOD standards is less than Θ per cent in any reach. These boundary values for DO and BOD concentrations are incorporated into a nonlinear water quality optimization model for finding the minimum cost set of wastewater treatment plant efficiencies required to meet DO and BOD standards. The method also provides the minimum DO concentration and the maximum BOD concentration which may be expected to occur 1-Θ of the time for any reach.

Assessment of the water quality of the upper reaches of the ouémé river in benin using benthic macroinvertebrate-based biotic indices

2020 ◽  
Vol 32 (4) ◽  
pp. 433
Author(s):  
Koudjodé Simon Abahi ◽  
Modeste Fadéby Gouissi ◽  
Hotèkpo Hervé Akodogbo ◽  
Sorébou Hilaire Sanni Worogo ◽  
Ayodélé Shola David Darius Adje ◽  
...  
Keyword(s):  
Water Quality ◽  
Benthic Macroinvertebrate ◽  
Biotic Indices

Exploration of Environmental Education on Campus-Huanggang River Watershed Protection in Case

2011 ◽  
Vol 311-313 ◽  
pp. 992-995
Author(s):  
Qing Yu Wang ◽  
Shi Kun Li
Keyword(s):  
Water Pollution ◽  
Water Quality ◽  
Environmental Education ◽  
River Basin ◽  
East China ◽  
River Watershed ◽  
Watershed Protection ◽  
Resource Protection ◽  
Basin Water ◽  
Water Quality Trends

Abstract: To Huanggang River watershed protection, for example, to carry out the exploration of environmental education on campus. River basin water pollution on the East China survey, indicating that the industry, and agriculture are the three sources of life; of the East China River Basin water quality trends and the causes of water pollution in Huanggang River Basin; described Huanggang the importance of water resource protection, and Defining the student's role in the protection of the environment.

scholarly journals Ecosystem Health Assessment of Pengkalan Chepa River Basin: Water Quality and Heavy Metal Analysis

2020 ◽  
Vol 49 (8) ◽  
pp. 1787-1798
Author(s):  
Mohd Saifuddin Maliki Abdullah ◽  
Maliki Hapani ◽  
Nur Fatien Muhamad Salleh ◽  
Wan Mohd Sahnusi Wan Alias
Keyword(s):  
Water Quality ◽  
Heavy Metal ◽  
River Basin ◽  
Ecosystem Health ◽  
Health Assessment ◽  
Metal Analysis ◽  
Heavy Metal Analysis ◽  
Ecosystem Health Assessment ◽  
Basin Water

scholarly journals Integrated Assessment of the Southern Bug River Basin Water Quality and Calculation of their Self-Cleaning Capacity

2021 ◽  
Keyword(s):  
Water Quality ◽  
Surface Water ◽  
River Basin ◽  
System Analysis ◽  
Statistical Parameter ◽  
Kendall Test ◽  
The Self ◽  
Ecological Index ◽  
Mann Kendall Test

Purpose. To carry out the surface water quality assessment of the Southern Bug river basin and to investigate the ability of surface water to self-purify. Methods. Statistical calculations, system analysis. Results. The long-term dynamic of the integrated quality index values of the Southern Bug during 2000-2016 was heterogeneous, but the general trend indicated a slight increase due to the sanitary-ecological index and pollution index. The highest level of water pollution was observed in Khmelnytsky city and Alexandrovka settlement. To assess the self-purification capacity of surface waters, the hydrological zoning of the basin was taken. According to it three regions were identified by the types of intra-annual runoff distribution: Verkhnyobuzky, Serednyobuzky and Nizhnobuzsky. The obtained results of EC coefficient calculations for mineral nitrogen compounds show the inability of rivers to self-purify for Verkhnyobuzky and Serednyobuzky regions. Instead, the ability to self-purify is preserved for phosphorus compounds.Using the nonparametric Mann - Kendall test allowed to estimate the long - term trend of nutrients for the Nizhnobuzsky hydrological region. Trends N-NO3-, N NH4+and Р-РО43- are characterized by positive values of the statistical parameter, which means the increasing of these elements’ concentrations. Conclusions. Rivers of the Southern Bug basin are classified as "good, clean enough". The main ecological and hydrochemical problems of the river are pollution by nutrients and indicators of toxic action. The results of the self-purification criterion calculations indicate their inability (in the upper and middle parts of the basin) to self-purification. Using of the nonparametric Mann-Kendall test for determining changes in nutrient compounds shows an upward trend, that means increasing of their concentrations.

River basin water quality assessment and management: case study of Tha Chin River Basin, Thailand

2009 ◽  
Vol 34 (3) ◽  
pp. 345-361 ◽  
Author(s):  
C. Wongsupap ◽  
S. Weesakul ◽  
R. Clemente ◽  
A. Das Gupta
Keyword(s):  
Water Quality ◽  
Quality Assessment ◽  
River Basin ◽  
Water Quality Assessment ◽  
Basin Water ◽  
Management Case Study
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