On improvement of water quality of a reservoir by optimizing water exchange

2017 ◽  
Vol 37 (1) ◽  
pp. 399-409
Author(s):  
Xue-yi You ◽  
Chun-xue Zhang
Keyword(s):  
Water Quality ◽  
Water Exchange

scholarly journals Water quality management in the coastal zone of the sea

2020 ◽  
Vol 215 ◽  
pp. 04003
Author(s):  
Yuriy Dreizis
Keyword(s):  
Water Quality ◽  
Water Resources ◽  
Coastal Zone ◽  
Water Exchange ◽  
Dynamic Models ◽  
Water Quality Management ◽  
Coastal Protection ◽  
Physical Factors ◽  
Marine Waters

Sea resort areas are currently one of the most successful developing regions. At the same time, the ecological condition of such regions is important, especially those that specialize in the provision of recreational and tourist services. The quality of coastal water resources played an important role in the sustainable development of those coastal tourist areas. Analysis of physical factors of water exchange was carried out and assessment of water resources quality of the coastal zone of the sea was made, including in closed and semi-enclosed water areas. It has been shown that water exchange is the most important factor in the management of the quality of marine waters of partially enclosed coastal areas. The results of the studies made it possible to assess the circulation of coastal marine waters and the change in certain indicators of water quality, including in the presence of various coastal protection facilities, based on 0-dimensional and system-dynamic models. The results obtained can be used to predict the state of water resources in coastal territories.

A modeling study of the impact of increasing water exchange rate on water quality of a semi-enclosed bay

2019 ◽  
Vol 136 ◽  
pp. 177-184 ◽  
Author(s):  
Mohammad Hassan Ranjbar ◽  
Majid Jandaghi Alaee ◽  
Mostafa Nazarali
Keyword(s):  
Water Quality ◽  
Exchange Rate ◽  
Water Exchange ◽  
Water Exchange Rate ◽  
Enclosed Bay ◽  
The Impact ◽  
Modeling Study

scholarly journals Assessing the ground waters of Bulgaria using a Water Quality Index

2020 ◽  
Vol 49 (2) ◽  
pp. 25-38
Author(s):  
Tanya Vasileva
Keyword(s):  
Water Quality ◽  
Groundwater Quality ◽  
Quality Index ◽  
Water Exchange ◽  
Major Ions ◽  
Health Hazard ◽  
Shallow Groundwater ◽  
Poor Quality ◽  
Drinking Purposes

The study focuses on the quality of shallow groundwater in Bulgaria based on the content of major ions. To be safe for drinking purposes, their concentrations must not exceed the respective thresholds. The groundwater quality is assessed in terms of health hazard by a groundwater quality index (GWQI or WQI), and the respective map is presented. The results show that for the territory of Bulgaria, this index varies from 13 to 92. The highest values of this index (related to health hazard) are typical for the lower hypsometric zone of the country. The shallow groundwater in the zone of active water exchange is distributed as follows: waters of excellent quality, waters of good quality, waters of poor quality, and waters of very poor quality, covering 3%, 39%, 22%, and 31% of the whole area of the country, respectively. In this study, no estimates have been made for 5% of the territory of Bulgaria, which is characterized by the presence of very hard groundwater.

scholarly journals Isolasi Fungi Asal Rawa Lebak Untuk Bioremediasi Air Rawa Tercemar Bahan Organik

2019 ◽  
Vol 7 (1) ◽  
pp. 34-45
Author(s):  
Ade Bayu Saputra ◽  
Marini Wijayanti ◽  
Dade Jubaedah
Keyword(s):  
Water Quality ◽  
Organic Matter ◽  
Water Exchange ◽  
Sampling Time ◽  
Quality Monitoring ◽  
Isolation And Identification ◽  
Black Water ◽  
And Mathematics ◽  
Selection Of

Aquaculture sometimes only depends on water absorption without water exchange therefore the accumulation of organic material give impact on water quality in aquaculture and cause illness and death of fish. Fungi have many variations in water that can be selected by isolation and identification to maintain water quality swamp cultured. This research aims to get swamp fungi isolates as candidate bioremediator of swamp water contaminated with organic matter. Research was conducted from December 2016 to April 2017 in Laboratory of Microbiology, Department of Biology, Faculty of Science and Mathematics, Sriwijaya University and Basic Laboratory of Fisheries, Department of Aquaculture, Faculty of Agriculture, University of Sriwijaya. The methods of research started from isolation and selection of fungi, analysis of isolates capability to improve the quality of black water, and observations of swamp water quality.This research method started from isolation and selection lipolytic, cellulolytic, proteolytic fungi, the test isolates ability to improve swamp water quality and observation of water swamp quality. Monitoring  of  water  quality done  at  the sampling time, beginning and end of the research, including pH, temperature, ammonia and TDS. The results showed that the best fungi growth rate in contaminated swamp water of organic matter was 93%.day-1. Fungi isolates are able to play a role in the ammonification of bioremediation process.  

Spatial and Temporal variation analysis of water quality of Hemavathi River, Karnataka, India

2018 ◽  
Vol 6 (9) ◽  
pp. 196
Author(s):  
Santhosh K. M ◽  
S. Prashanth
Keyword(s):  
Water Quality ◽  
Agricultural Runoff ◽  
Spatial And Temporal Variation ◽  
Final Conclusion ◽  
Variation Analysis ◽  
Pollution Load ◽  
Quality Of Water ◽  
Pollution Loading ◽  
Origin Point

Urban development, agricultural runoff and industrialization have contributed pollution loading on the environment.  In this study Hemavathi river water from a stretch from its origin point to its sangama was studied for pollution load by determining parameters of water quality like pH, Alkalinity,  Ca, Mg, Nitrate, TDS, BOD, COD , and the results were compared with WHO and BIS standards to draw final conclusion on the quality of water.

Changes of microbial indices of water quality in the Vistula and Brda rivers as a result of sewage treatment plant operation

2008 ◽  
Vol 37 (2) ◽  
Author(s):  
Maciej Walczak
Keyword(s):  
Water Quality ◽  
Sewage Treatment ◽  
Sewage Treatment Plant ◽  
Treatment Plant ◽  
Sewage Treatment Plants ◽  
Plant Operation ◽  
Treated Sewage ◽  
Microbiological Parameters ◽  
Microbial Indices

Changes of microbial indices of water quality in the Vistula and Brda rivers as a result of sewage treatment plant operationThis paper reports the results of studies of microbiological changes in the water quality of the Vistula and Brda rivers after the opening of sewage treatment plants in Bydgoszcz. The study involved determining the microbiological parameters of water quality. Based on the results obtained, it was found that the quality of the water in both rivers had improved decidedly after the opening of the plants, although an increased number of individual groups of microorganisms was found at the treated sewage outlet from one of the plants.

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