IAHR, founded in 1935, is a worldwide independent member-based organisation of engineers and water specialists working in fields related to the hydro-environmental sciences and their practical application. Activities range from river and maritime hydraulics to water resources development and eco-hydraulics, through to ice engineering, hydroinformatics, and hydraulic machinery.
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You are here : eLibrary : IAHR World Congress Proceedings : 35th IAHR Congress - Chengdu (2013) : THEME 4 - HYDRO-ENVIRONMENT : Effect of Groundwater Inflow on Nitrogen Level of Rural River Flowing into Eutrophic Lake
Effect of Groundwater Inflow on Nitrogen Level of Rural River Flowing into Eutrophic Lake
Author : Masayoshi Kitagawa, Yasuo Nihei and Wataru Harada
Nitrogen contamination in rural rivers may be caused by the pollutant load from plowed fields with excessive fertilization through groundwater. However, there have not been sufficient investigations on discharge and pollutant load of groundwater into rivers. We conducted field measurements to clarify the discharge and nitrogen flux of groundwater into the Takasakigawa River, which flows into Lake Inba-numa and contains nitrogen contamination. The results indicated that: 1) the nitrate concentration of groundwater was mostly higher than that of river water and 2) discharge and nitrate flux of groundwater into the river were 73~92%, and 81~95%, respectively, in the observed 1.4-km stretch of river. 3) The source of the groundwater flowing into the Takasakigawa River is discussed using water quality data of groundwater in its catchment area.
File Size : 368,387 bytes
File Type : Adobe Acrobat Document
Chapter : IAHR World Congress Proceedings
Category : 35th IAHR Congress - Chengdu (2013)
Date Published : 18/07/2016
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