| Budget Amount *help |
¥4,290,000 (Direct Cost: ¥3,300,000、Indirect Cost: ¥990,000)
Fiscal Year 2011: ¥520,000 (Direct Cost: ¥400,000、Indirect Cost: ¥120,000)
Fiscal Year 2010: ¥3,770,000 (Direct Cost: ¥2,900,000、Indirect Cost: ¥870,000)
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| Research Abstract |
This study verifies whether snowmelt water from the Ane River serves as the density current in Lake Biwa by measuring the water temperature, water current, and other water elements such as conductivity, oxygen, and turbidity by using a mooring logging system at the embouchure of the river. We found that the water mass was characterized by a relatively low temperature, high oxygen content, and low conductivity near the bottom as compared to the surrounding water. This water mass appeared at face of embouchure for three days. With such characteristics, this water would be neither underground water(which has a lower oxygen concentration than lake water) nor coastal cooling water(whose conductivity should be the same as the surrounding lake water, and which should appear only in the morning and not last for several days). In conclusion, water at the bottom is possibly the density current originated from Ane River.
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