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Physical Processes in a Large Lake: Lake Biwa, Japan

Physical Processes in a Large Lake: Lake Biwa, Japan

Setsuo Okuda (Editor), Jorg Imberger (Editor), Michio Kumagai (Editor)

ISBN: 978-1-118-66535-0

Mar 2013, American Geophysical Union

216 pages

Select type: O-Book

Description

Published by the American Geophysical Union as part of the Coastal and Estuarine Studies, Volume 48.

Lake Biwa is very important in a social context. It is the largest lake in Japan and presently supplies some 15 million people in four prefectures, Shiga, Kyoto, Osaka and Hyogo with drinking water, making it the single most important source of water in Japan.

It is also important from a geographical perspective. It is a natural lake born some five million years ago and is therefore geologically one of the oldest lakes in the world.

PREFACE vii

1 Introduction
S. Okuda and M. Kumagai 1

PART I: GEOSTROPIC GYRES

2 Review of Geostropic Gyres
S. Endoh  7

3 Field Observation in the North Basin
S. Endoh, Y. Okumura, and I. Okamoto 15

PART II: WATER MASS EXCHANGE

4 Water Mass Exchange Between the Main Basin and Shiozu Bay
I. Okamoto and S. Endoh 31

5 Field Observations of the Dense Bottom Current Between the North and South Basins
K. Okubo 43

6 Numerical Simulation of the Density-Induced Currents Between the North and South Basins of Lake Biwa
Y. Oonishi 53

PART III: OPTICAL CHARACTERISTICS AND TURBIDITY DYNAMICS

7 Spectral Irradiance and Optical Properties
R. Tsuda and M. Nakanishi 65

8 Turbidity in the North and South Basins
R. Tsuda 77

9 Dynamics of the Turbid Benthic Boundary Layer
M. Kumagai, R. Tsuda and K. Fukagae 87

PART IV: INFLOWS INTO LAKE BIWA

10 Distribution and Mixing of the River Seri Water
I. Okamoto, S. Endoh, M. Kumakai 101

11 Sedimentation o f Suspended M atter in the Mouth of the Ane River
Y. Okumura 119

12 Inflows Due to Snow Melt
M. Kumagai and H. Fushimi 129

PART V: BOTTOM SEDIMENTATION AND PALEO-HYDROLOGY

13 Recent Sedimentation Rates and Sedimentary Anomalies
H. Taishi 141

14 Bottom Sediments and Paleo-Hydrological Processes
A. Yamamoto 153

15 Global Paleo-Hydrological Processes and Lake Biwa
K. Kashiwaya and K. Fukuyama 169

PART VI: MODERN SENSING TECHNIQUES IN LAKE BIWA

16 Thermal Infrared Mapping
Y. Itakura 181

17 Laser Sensing of Phytoplankton Size
R. Tsuda, Y. Kakui and M. Kumagai 195

18 New Measurement Techniques and Some Depositional Problems at the Lake Bottom
K. Yokoyama and S. Okuda 203

List of Contributors