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