· temporal and spatial variability of topography and the water environment in akashi river mouth...

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⍹Ꮉᴡญࠆߌ߅ߦᒻ᳓ⅣႺߩⓨ㑆ᄌേ ᣂ ᐔ* ቝ㊁ ብม** Temporal and Spatial Variability of Topography and the Water Environment in Akashi River Mouth Junpei ARAI* Kohji UNO** An urban river runs trough the area which is concentrated population and assets. In this study, we propose a saving, economic and safe measurement on the topography change and temporal and spatial distribution of water environment at the urban river mouth. Study site is Akashi river mouth in Hyogo prefecture, JAPAN. First, we observe the shape of the river-mouth bar and sediment property using a hand-held camera and portable GPS equipment. Second, we tried to understand the topography change and the temporal and spatial distribution on water environment such as water temperature and salinity, the measurement by the radio control boat was carried out. Finally, the continuity monitoring at the fixed point was conducted. It was clarified the bar has grown and grown until the flooding. After the flooding, the sediment on the bar became coarse. We also confirmed the relationship between the shape of river mouth and topographic feature and water environment. Keywords: river mouth, fish finder, a radio-controlled boat, portable GPS 26km, 126.7km 2 2010 2011 1 2011 6 * ** 100 -113- 論文/新井・宇野:明石川河口における地形・水環境の時空間変動

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Page 1:  · Temporal and Spatial Variability of Topography and the Water Environment in Akashi River Mouth Junpei ARAI* Kohji UNO** An urban river runs trough the area which is

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Temporal and Spatial Variability of Topography and the Water

Environment in Akashi River Mouth

Junpei ARAI*� Kohji UNO** ��������

An urban river runs trough the area which is concentrated population and assets. In this study, we propose a

saving, economic and safe measurement on the topography change and temporal and spatial distribution of

water environment at the urban river mouth. Study site is Akashi river mouth in Hyogo prefecture, JAPAN.

First, we observe the shape of the river-mouth bar and sediment property using a hand-held camera and

portable GPS equipment. Second, we tried to understand the topography change and the temporal and spatial

distribution on water environment such as water temperature and salinity, the measurement by the radio control

boat was carried out. Finally, the continuity monitoring at the fixed point was conducted. It was clarified the

bar has grown and grown until the flooding. After the flooding, the sediment on the bar became coarse. We also

confirmed the relationship between the shape of river mouth and topographic feature and water environment.

Keywords: river mouth, fish finder, a radio-controlled boat, portable GPS �� �� � ������������������� !"#$%&'%()*!+,-.�/012345����/6�789:;<.=!>�?)�@AB!CD�5EF�GHIJKL�MNO�HP�QRSGTUV.W��XYSZ[5\]^�_`a�bc)def%gh%i�j-��@Skl!mJn=!>op5q�rst�uvwxJn%!yz{>m�*|)� ���}?~��1�� !J��p�.EF��J�234�%�5�� ~��������.��;�����;��VSn������%��1�wJ��!y��>K�K��� J%!�?��0¡S¢£ !p¤�¥¦.§¨$%©ª«¬�­®ABL�%�>

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論文/新井・宇野:明石川河口における地形・水環境の時空間変動

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