NDLI: Distribution of CH4 in the north basin of Lake Biwa and tributary rivers

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Environmental chemistry of rivers and lakes, Part VII. Fractionation by calculation of suspended particulate matter in Lake Biwa into three types of particles of different origins

Climatic changes during the past 1300 years as deduced from the sediments of Lake Nakatsuna, central Japan

Evaluation of formation potential of trihalomethanes and mutagens due to chlorination of river water along the Kizu River in the Yodo River system in Japan

Effects of seston on ultraviolet attenuation in Lake Biwa

Water current velocity as an environmental factor regulating the distribution of amphipod species in Gamo lagoon, Japan

Distribution of CH4 in the north basin of Lake Biwa and tributary rivers

Seasonality in nutrient concentrations and stable isotope ratios of Halophila ovalis growing on the intertidal flat of SW Thailand

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Identification of cultured and uncultured picocyanobacteria from a mesotrophic freshwater lake based on the partial sequences of 16S rDNA

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Eutrophication of reservoirs in South Korea

Limnology : Volume 2, Issue 2, August 2001

Limnology : Volume 2, Issue 1, April 2001

Limnology : Volume 1

Distribution of CH4 in the north basin of Lake Biwa and tributary rivers

Content Provider	Springer Nature Link
Author	Yamada, Y. Koitabashi, T. Ueda, T. Wada, E.
Copyright Year	2001
Abstract	To determine the origin of CH4, the vertical distribution of CH4 around the thermocline in the north basin of Lake Biwa and the horizontal distribution in the Yasu and Ado rivers were measured. In 1995, CH4 concentrations (ranging from 200 to 1000 nM) exceeding the saturation level were observed just above or in the thermocline in the pelagic region off the Yasu River. These values were higher than those just below the thermocline and in the hypolimnion. CH4 concentrations in the mouths of the Yasu and Ado rivers were much higher than at other stations, around 2500 and 2000 nM, respectively. Due to the drought in 1994 when there was no water from the Yasu River flowing into the north basin, CH4 concentration just above or in the thermocline in the pelagic region off the Yasu River ranged from 49 to 74 nM. It is thus concluded that the high level of CH4 observed in the mouth of the Yasu River is one of the sources of the high CH4 concentrations in the pelagic region off the Yasu River. On the other hand, the CH4 concentration in the pelagic region off the Ado River was about 50 nM. It is thought that water flowing in from the Ado River diffused readily into the lake water because the depth of the lake in the region off the Ado River declines steeply. The maximum concentration of CH4 in the river mouths indicates that these areas are important sites for clarifying the mechanism of the decrease in dissolved oxygen in Lake Biwa and the Yodo River watershed.
Starting Page	193
Ending Page	197
Page Count	5
File Format	PDF
ISSN	14398621
Journal	Limnology
Volume Number	2
Issue Number	3
Language	English
Publisher	Springer-Verlag Tokyo
Publisher Date	2001-12-01
Publisher Place	Tokyo
Access Restriction	One Nation One Subscription (ONOS)
Content Type	Text
Resource Type	Article
Subject	Ecology Aquatic Science Water Science and Technology

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