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

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 Changes of Water Quality of Lake Biwa Caused by the Shortage of Water in 1994

1995 ◽  
Vol 23 ◽  
pp. 376-381 ◽  
Author(s):  
Sunao YAMANAKA ◽  
Naoki FUJIWARA ◽  
Noriko SANUKI ◽  
Yasumichi MATSUOKA ◽  
Tetsuya WAKABAYASHI ◽  
...  
Keyword(s):  
Water Quality ◽  
Lake Biwa

scholarly journals The water quality of Lake Biwa-ko

1957 ◽  
Vol 19 (1) ◽  
pp. 1-22 ◽  
Author(s):  
Ken-ichirô NEGORO
Keyword(s):  
Water Quality ◽  
Lake Biwa

A study on pollutant loads from the forest and rice paddy fields

1996 ◽  
Vol 33 (4-5) ◽  
pp. 159-165 ◽  
Author(s):  
Osami Kawara ◽  
Katsuya Hirayma ◽  
Takao Kunimatsu
Keyword(s):  
Water Quality ◽  
Lake Biwa ◽  
Rice Paddy ◽  
River Basins ◽  
Point Sources ◽  
Paddy Fields ◽  
Pollutant Loads ◽  
Rice Paddy Fields ◽  
Load Generation

The eutrophication of Lake Biwa, which is the largest lake in Japan and one of the most important fresh water resources, has been warned since 1960s. In order to improve the water quality of the lake, it is inevitable to reduce the pollutant loads from the river basins. The Hino river and the Soma river basins are considered in the present study and models which predict the influence of pollutant load generation on the discharged pollutant loads through the rivers. These basins mainly consist of forests and rice paddy fields. The identified models reproduce the observed water quality relatively well. Evaluation of loads from point-sources and non-point sources indicates that the loads from non-point sources occupy the most of pollutant loads from the basins. Especially, the loads from rice paddy fields occupy most of the pollutant loads from the basisn. Therefore, controlling non-point source pollutant loads in the Hino and Soma river basins is an important step in checking the eutrophication of Lake Biwa.

Study on characteristics of pollutant runoff into lake biwa, Japan

1999 ◽  
Vol 39 (12) ◽  
pp. 17-25 ◽  
Author(s):  
Atsushi Ichiki ◽  
Kiyoshi Yamada
Keyword(s):  
Water Quality ◽  
Environmental Management ◽  
River Basin ◽  
Lake Biwa ◽  
Annual Runoff ◽  
Macro Model ◽  
Pollutant Runoff

This study aims to simulate pollutant runoff using the Macro Model and examine the characteristics of pollutant runoff into Lake Biwa. As a result of the simulations in all rivers flowing into Lake Biwa, annual runoff load from every river basin was shown. The characteristics of pollutant runoff into Lake Biwa were examined with consideration to characteristics of river basin and rainfalls. In the results, it was shown how we should control pollutant runoff effectively in order to protect the water quality of Lake Biwa, and some knowledge concerned with the environmental management of the Lake Biwa basin was obtained.

The effect of low water levels on the water quality of Lake Biwa

Hydrobiologia ◽  
1989 ◽  
Vol 176-177 (1) ◽  
pp. 29-38 ◽  
Author(s):  
Akira Kurata
Keyword(s):  
Water Quality ◽  
Lake Biwa ◽  
Water Levels

Effect of agriculture on water quality of Lake Biwa tributaries, Japan

2008 ◽  
Vol 389 (1) ◽  
pp. 132-148 ◽  
Author(s):  
Takanori Nakano ◽  
Ichiro Tayasu ◽  
Yoshihiro Yamada ◽  
Takahiro Hosono ◽  
Akitake Igeta ◽  
...  
Keyword(s):  
Water Quality ◽  
Lake Biwa
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