VARIATION CHARACTERISTICS OF GROUNDWATER QUALITY IN TIDAL FLAT DURING FLOOD PERIOD

Shinya NAKASHITA, Tadashi HIBINO, Shoji FUKUOKA, Mitsumasa OKADA, Masamitsu MIZUNO
2008 PROCEEDINGS OF HYDRAULIC ENGINEERING  
Shinya NAKASHITA, Tadashi HIBINO, Shoji FUKUOKA, Mitsumasa OKADA and Masamitsu MIZUNO 1学生会員 広島大学大学院工学研究科 社会環境システム専攻(〒739-8527 東広島市鏡山1-4-1) 2正会員 博(工学) 広島大学大学院工学研究科准教授 社会環境システム専攻(同上) 3フェロー 工博 Ph.D 中央大学研究開発機構教授(〒112-8551 東京都文京区春日1-13-27) 4正会員 工博 広島大学大学院工学研究科教授(〒739-8527 東広島市鏡山1-4-1) 5正会員 工修 (独)水資源機構 関西支社副支社長(〒540-0005大阪府大阪市中央区上町A番12号) 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
more » ... cteristics 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.
doi:10.2208/prohe.52.1081 fatcat:izd47nn3lfcixoi5n6hj3rxswe