TY - GEN
T1 - Evaluation of denitrification potential in coastal groundwater using simple in situ injection experiment
AU - Saito, M.
AU - Onodera, S.
AU - Okada, K.
AU - Sawano, M.
AU - Miyaoka, K.
AU - Chen, J.
AU - Taniguchi, M.
AU - Liu, G.
AU - Fukushima, Y.
PY - 2009
Y1 - 2009
N2 - 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.
AB - 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.
KW - Coastal groundwater
KW - Denitrification potential
KW - In situ injection experiment
UR - http://www.scopus.com/inward/record.url?scp=79952406521&partnerID=8YFLogxK
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M3 - Conference contribution
AN - SCOPUS:79952406521
SN - 9780415472791
T3 - 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
SP - 653
EP - 658
BT - From Headwaters to the Ocean
T2 - International Conference on Hydrological Changes and Management from Headwaters to the Ocean, HYDROCHANGE 2008
Y2 - 1 October 2008 through 3 October 2008
ER -