scholarly journals Experimental Research into the use of Aquatic Plants for the Improvement of Water Quality in the Main Tributary to Lake Biwa

1995 ◽  
Vol 23 ◽  
pp. 382-389
Author(s):  
Motoo Nakagawa ◽  
Hiroyuki Sugimoto ◽  
Kazuhiro Terai
Keyword(s):  
Water Quality ◽  
Experimental Research ◽  
Aquatic Plants ◽  
Lake Biwa

The Impact of the Industrial Processing of Oil on the Rainfall Water Quality

2017 ◽  
Vol 68 (1) ◽  
pp. 175-179
Author(s):  
Oana Roxana Chivu ◽  
Augustin Semenescu ◽  
Claudiu Babis ◽  
Catalin Amza ◽  
Gabriel Iacobescu ◽  
...  
Keyword(s):  
Water Quality ◽  
Sulfuric Acid ◽  
Experimental Research ◽  
Air Purification ◽  
High Toxicity ◽  
Industrial Processing ◽  
Mobile Sources ◽  
Specific Activities ◽  
The Impact ◽  
The Ideal

Rainfall is a major component of the environment and the main source of the air purification becouse of many pollutants increases who have the most varied sources: various human activities including industry and agriculture, and some household duties. Air purification by means of precipitation is achieved by numerous highly complex mechanisms. The final products of degradation of the pollutant in the air, which are generally harmless, can be reacted with each other in the presence of water, giving rise to the final compounds with a high toxicity. Thus, exhaust, mobile sources of noxious almost identical to those specific activities in the industrial processing of oil, contain lead which is the ideal catalyst for converting SO2 to sulfuric acid in the presence of rainwater, with all the disadvantages that they create. This paper will present an experimental research oabout how rainfall water quality is influenced by the activity of the industrial processing of oil, in a chemical plant in Constanta County.

The relationship between musty-odor-causing organisms and water quality in Lake Biwa

1995 ◽  
Vol 31 (11) ◽  
pp. 153-158 ◽  
Author(s):  
M. Kajino ◽  
K. Sakamoto
Keyword(s):  
Water Quality ◽  
Data Analysis ◽  
Green Algae ◽  
Analytical Methods ◽  
Lake Biwa ◽  
Blue Green Algae ◽  
Odor Compounds ◽  
Musty Odor ◽  
The Relationship

Musty odor has occurred annually in Lake Biwa since 1969. Osaka municipal waterworks, which is located downstream of Lake Biwa, has made many efforts to treat musty-odor compounds produced in Lake Biwa from spring through autumn. With the development of analytical methods for the determination of musty-odor compounds, we have been able to confirm that planktonic blue-green algae are the major causes of the musty-odor occurrences. The relationship between the growth of blue-green algae and the water quality was not so apparent. However, through our data analysis focusing on the relationship between musty-odor occurrences due to Phormidium tenue or Oscillatoria tenuis and some nutrients in Lake Biwa, we found that the concentration of nitrate in water may be an important parameter for the estimation of growth of the algae and the musty-odor behavior.

scholarly journals Chemical and ecological studies for water quality of Lake Biwa

1976 ◽  
Vol 12 (1) ◽  
pp. 22-26
Author(s):  
Susumu HASHIMOTO ◽  
Masanori FUJITA ◽  
Kenji FURUKAWA
Keyword(s):  
Water Quality ◽  
Lake Biwa ◽  
Ecological Studies

scholarly journals Analysis and Prediction on Water Quality Improvements by Aquatic Plants in a Storage

2013 ◽  
Vol 13 (6) ◽  
pp. 439-446 ◽  
Author(s):  
Eung Seok Kim ◽  
Kuy Bum Sim ◽  
Gunhui Chung ◽  
Hyun Il Choi
Keyword(s):  
Water Quality ◽  
Aquatic Plants ◽  
Quality Improvements

Quantitative comparison of forests and other areas with dry weather input loading in the Lake Biwa catchment area

2002 ◽  
Vol 45 (9) ◽  
pp. 183-193 ◽  
Author(s):  
S. Fujii ◽  
H. Tanaka ◽  
I. Somiya
Keyword(s):  
Water Quality ◽  
Lake Biwa ◽  
River Mouth ◽  
Weather Conditions ◽  
Ionic Species ◽  
Concentration Difference ◽  
Forest Sites ◽  
Catchment Areas ◽  
Unit Loading ◽  
River Mouths

For the evaluation of pollutants loading to Lake Biwa, comprehensive river surveys on river mouths and forest sites were conducted 9 times from 1996 to 1999, on 25–40 main rivers in the Lake Biwa watershed. The main results obtained are as follows. (1) River water quality reflects regional characteristics of their catchment areas, and the concentration difference among rivers ranged between 2–3 fold. (2) Concentration variation shows different patterns with time and location depending on water quality indices used. (3) Indices related to organic matter and nutrients have lower correlation between forests and river mouths, but those related to ionic species showed strong correlation. (4) Flux comparison of forest and river mouth sites suggests that pollutants from catchment areas are conveyed to the lake not only through rivers but also underground. (5) In dry weather conditions, forests contribute 30% to the whole pollutants (TN, TP, and TCODMn) loading, and the remainder is derived mainly from paddy fields and residential/commercial zones. (6) Unit loading factors from forests are estimated as 640, 57 and 1200 kg/km2/y, respectively for TN, TP and TCODMn, while those from other areas are estimated as 2,500, 208 and 4,200 kg/km2/y.

Estimation of urban nonpoint source pollution in Lake Biwa Basin

1998 ◽  
Vol 38 (10) ◽  
pp. 157-163 ◽  
Author(s):  
Atsushi Ichiki ◽  
Toshiyuki Ohnishi ◽  
Kiyoshi Yamada
Keyword(s):  
Water Quality ◽  
Environmental Management ◽  
Nonpoint Source Pollution ◽  
Lake Biwa ◽  
Nonpoint Source ◽  
Storm Events ◽  
Valuable Data ◽  
Nonpoint Sources ◽  
Pollutant Runoff

This study aims to simulate pollutant runoff into Lake Biwa using the Macro Model and examine the runoff characteristics of pollutants from urban nonpoint sources. As a result of the simulations of all rivers flowing into Lake Biwa, the characteristics of urban nonpoint source pollution and the basic units of urban nonpoint pollutants in the Lake Biwa basin became clear. It was shown that the control of pollutant runoff from nonpoint sources during storm events was significant in order to protect the water quality of Lake Biwa. From these results, valuable data concerning the environmental management of the Lake Biwa basin was obtained.

scholarly journals Avaliação de bacia hidrográfica por alunos do Ensino Fundamental: contribuição ao ensino dos recursos hídricos

2016 ◽  
Vol 11 (5) ◽  
pp. 1056
Author(s):  
Cheila Flávia De Praga Baião ◽  
Getulio Teixeira Batista
Keyword(s):  
Water Quality ◽  
Elementary School Students ◽  
Water Flow ◽  
Aquatic Plants ◽  
Riparian Vegetation ◽  
Rapid Assessment ◽  
Educational Tool ◽  
School Students ◽  
Assessment Protocol ◽  
Paraíba Do Sul River

This work developed and tested a rapid assessment protocol (RAP) in a watershed of the Paraíba do Sul River Basin, to be applied by elementary school students. The study was conducted in a public school of São José dos Campos (SP), with 60 students of the 6th grade (n = 30) and 7th grade (n = 30). The protocol developed includes 12 parameters with text consistent with student levels and with illustrations of the variables of each parameter. The parameters are the type of usage of the stream margins, erosion and siltation, presence of sewage, presence of aquatic plants, water odor, water oiliness, water transparency, type of bottom, rapids and water flow, garbage presence, the presence of animals, and the presence of riparian vegetation. The results showed that 65% of the students understood all parameters and showed great interest in the proposed protocol; the others needed to better understand the parameters of erosion and siltation, presence of aquatic plants, rapids, water flow and presence of riparian vegetation. It was found that the developed RAP was appropriate and can contribute as an educational tool for the study of water quality.

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