The spatial distributions of seepage flux and water quality of groundwater in the littoral zone of Lake Biwa

2002 ◽  
Vol 28 (3) ◽  
pp. 1526-1532
Author(s):  
Masao Kobayashi ◽  
Koichi Kitaoka ◽  
Kimiko Horiuchi
Keyword(s):  
Water Quality ◽  
Littoral Zone ◽  
Lake Biwa ◽  
Spatial Distributions

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

The Influence of Large Scale Phosphate Mining on the Water Quality of the Huangbaihe River Basin in China: Dominant Pollutants and Spatial Distributions

2019 ◽  
Vol 38 (2) ◽  
pp. 366-377 ◽  
Author(s):  
Gebrehiwet Legese Reta ◽  
Xiaohua Dong ◽  
Bob Su ◽  
Xiaonong Hu ◽  
Huijuan Bo ◽  
...  
Keyword(s):  
Water Quality ◽  
River Basin ◽  
Large Scale ◽  
Spatial Distributions ◽  
Phosphate Mining

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

scholarly journals ENVIRONMENTAL ASSESSMENT OF WATER QUALITY OF THE LITTORAL ZONE OF LAKE LADOGA BASED ON THE RESULTS OF MICROBIOLOGICAL STUDIES

2020 ◽  
pp. 88
Author(s):  
Галина Геннадьевна Митрукова ◽  
Лариса Леонидовна Капустина ◽  
Евгений Александрович Курашов ◽  
Galina Mitrukova ◽  
Larisa Kapustina ◽  
...  
Keyword(s):  
Water Quality ◽  
Environmental Assessment ◽  
Littoral Zone ◽  
Lake Ladoga

Effect of Low Water Level on the Water Quality of the Littoral Zone in Lake Kinneret

1993 ◽  
Vol 27 (7-8) ◽  
pp. 363-371 ◽  
Author(s):  
Sarig Gafny ◽  
Avital Gasith
Keyword(s):  
Water Quality ◽  
Littoral Zone ◽  
Suspended Solids ◽  
Major Change ◽  
Open Water ◽  
Water Levels ◽  
Lake Kinneret ◽  
Significant Difference ◽  
High Lake Levels

Water quality in the shallow littoral of Lake Kinneret was examined during a period of low water levels in 1989-1990. On calm days, no significant difference was found between the water quality on different sites around the lake or between the littoral and the open water. Lowering of the lake level in Lake Kinneret is associated with a major change in the nature of the bottom of the littoral zone in many sites, from rocky substrate in high lake levels (>212m below sea level) to sandy or clay in lower levels. During north-easterly storms, in winter, the concentrations of suspended solids and total phosphorus were markedly higher in leeward littoral sites compared to other regions of the littoral zone. This may be attributed to resuspension of sediments by the wave action over the soft bottom. In rainy winters, runoff, mainly Jordan River input, may locally affect the water quality and result in a north-south gradient.

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.

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