2013年
Nutrient transport and surface water-groundwater interactions in the tidal zone of the Yamato River, Japan
UNDERSTANDING FRESHWATER QUALITY PROBLEMS IN A CHANGING WORLD
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- 巻
- 361
- 号
- 開始ページ
- 204
- 終了ページ
- 211
- 記述言語
- 英語
- 掲載種別
- 研究論文(国際会議プロシーディングス)
- 出版者・発行元
- INT ASSOC HYDROLOGICAL SCIENCES
This study examined nutrient transport dynamics and surface water groundwater interactions in the tidal area of the Yamato River near Osaka, Japan. Spatial variation in radon (Rn-222) and hydraulic gradient suggest that groundwater discharges to the river in the upstream reaches, but in the zone near the river mouth, river water recharges the groundwater. The deep groundwater depression is likely due to heavy groundwater extraction for use in Osaka up to 1970. Nitrate-nitrogen (NO3-N) levels were negatively correlated with dissolved organic nitrogen (DON). Based on mass balance calculations, nutrient production occurred in the tidal reach. Approximately 3% of dissolved total nitrogen (DTN) and 9% of dissolved total phosphorus (DTP) loads were attributed to upstream sources.
- リンク情報
- ID情報
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- ISSN : 0144-7815
- Web of Science ID : WOS:000323627500023