Evaluation of denitrification potential in coastal groundwater using simple in situ injection experiment

M. Saito, S. Onodera, K. Okada, M. Sawano, K. Miyaoka, J. Chen, M. Taniguchi, G. Liu, Y. Fukushima

Research output: Chapter in Book/Report/Conference proceedingConference contribution

2 Citations (Scopus)

Abstract

The authors conducted the study to confirm the process and potential of denitrification in the groundwater at the mountainous catchment (IK) located on the small islands of southern Japan and the Yellow river delta (YD), China. The relation between NO3--N concentration and δ15N indicates that denitrification process occurred in the coastal groundwater of both catchments. Moreover, at the YD, the same trend was also confirmed in the groundwater recharge area. Simple in situ injection experiment was conducted at the observation boreholes located on the coastal area to confirm the denitrification rate. The result shows that denitrification occurred in the groundwater of 3 m and 30 m depths at IK. However, it was not confirmed at the 15 m characterized by relatively large groundwater velocity. On the contrary, extremely high potential of denitrification is confirmed at the YD compared with that in IK. These results suggest that denitrification in the coastal groundwater is more significant at the YD than IK, and it suggests that groundwater velocity have an effect of denitrification process.

Original languageEnglish
Title of host publicationFrom Headwaters to the Ocean
Subtitle of host publicationHydrological Changes and Watershed Management - Proc. of the International Conference on Hydrological Changes and Management from Headwaters to the Ocean, HYDROCHAN 2008
Pages653-658
Number of pages6
Publication statusPublished - Dec 1 2009
Externally publishedYes
EventInternational Conference on Hydrological Changes and Management from Headwaters to the Ocean, HYDROCHANGE 2008 - Kyoto, Japan
Duration: Oct 1 2008Oct 3 2008

Publication series

NameFrom Headwaters to the Ocean: Hydrological Changes and Watershed Management - Proceedings of the International Conference on Hydrological Changes and Management from Headwaters to the Ocean, HYDROCH

Other

OtherInternational Conference on Hydrological Changes and Management from Headwaters to the Ocean, HYDROCHANGE 2008
CountryJapan
CityKyoto
Period10/1/0810/3/08

Keywords

  • Coastal groundwater
  • Denitrification potential
  • In situ injection experiment

ASJC Scopus subject areas

  • Geochemistry and Petrology
  • Ocean Engineering
  • Water Science and Technology

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  • Cite this

    Saito, M., Onodera, S., Okada, K., Sawano, M., Miyaoka, K., Chen, J., Taniguchi, M., Liu, G., & Fukushima, Y. (2009). Evaluation of denitrification potential in coastal groundwater using simple in situ injection experiment. In From Headwaters to the Ocean: Hydrological Changes and Watershed Management - Proc. of the International Conference on Hydrological Changes and Management from Headwaters to the Ocean, HYDROCHAN 2008 (pp. 653-658). (From Headwaters to the Ocean: Hydrological Changes and Watershed Management - Proceedings of the International Conference on Hydrological Changes and Management from Headwaters to the Ocean, HYDROCH).