出水期における干潟地盤内での水質変動特性 VARIATION CHARACTERISTICS OF GROUNDWATER QUALITY IN TIDAL FLAT DURING FLOOD PERIOD
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Water environment at tidal flat is maintained by the provision of groundwater in Ota River Floodway during a flood. In this paper, variation characteristics of groundwater quality in the tidal flat, located in 5.4 km upstream from Ota River mouth were investigated by river discharge and groundwater level in Ota Rive Delta. It is considered that salinity of the groundwater in the tidal flat was decreased by outflow of the groundwater in Ota River Delta. The high gradient of water level was formed by high ground water level in the rainy season and small amplitude of the tide under the ground of the delta. As a result, ground water in the delta is easy to flow into the tidal flat.
- PROCEEDINGS OF HYDRAULIC ENGINEERING
PROCEEDINGS OF HYDRAULIC ENGINEERING (52), 1081-1086, 2008
Japan Society of Civil Engineers