TY - GEN
T1 - Nitrate contamination in groundwater of the Yellow River Delta and its effect on the marine environment
AU - Saito, Mitsuyo
AU - Onodera, Shin Ichi
AU - Miyaoka, Kunihide
AU - Chen, Jianyao
AU - Taniguchi, Makoto
AU - Liu, Guanqun
AU - Fukushima, Yoshihiro
PY - 2007/12/1
Y1 - 2007/12/1
N2 - The current condition of nitrate (NO3-) contamination in groundwater and its effect on the marine environment were evaluated in the Yellow River Delta, northeastern China. In the groundwater recharge area, NO3- contamination is suggested to be more severe compared with that in the groundwater discharge area. Also a relatively large amount of nitrogen is estimated to have accumulated in the aquifer of the recharge area. However, distribution of nitrate-nitrogen (NO3--N) concentrations and δ15N implied a denitrification process in the aquifer of the coastal area. In addition, a high rate of denitrification was indicated there by in situ experiments involving injected tracer water with high concentrations of NO3--N. Based on these results, it is suggested that a large amount of nitrate will be removed before it reaches the sea.
AB - The current condition of nitrate (NO3-) contamination in groundwater and its effect on the marine environment were evaluated in the Yellow River Delta, northeastern China. In the groundwater recharge area, NO3- contamination is suggested to be more severe compared with that in the groundwater discharge area. Also a relatively large amount of nitrogen is estimated to have accumulated in the aquifer of the recharge area. However, distribution of nitrate-nitrogen (NO3--N) concentrations and δ15N implied a denitrification process in the aquifer of the coastal area. In addition, a high rate of denitrification was indicated there by in situ experiments involving injected tracer water with high concentrations of NO3--N. Based on these results, it is suggested that a large amount of nitrate will be removed before it reaches the sea.
KW - Denitrification process
KW - Marine environment
KW - Nitrate contamination
KW - Yellow River Delta
UR - http://www.scopus.com/inward/record.url?scp=55749100688&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=55749100688&partnerID=8YFLogxK
M3 - Conference contribution
AN - SCOPUS:55749100688
SN - 9781901502145
T3 - IAHS-AISH Publication
SP - 271
EP - 277
BT - IAHS-AISH Publication - Water Quality and Sediment Behaviour of the Future
T2 - International Symposium: Water Quality and Sediment Behaviour of the Future: Predictions for the 21st Century - 24th General Assembly of the International Union of Geodesy and Geophysics (IUGG)
Y2 - 11 July 2007 through 13 July 2007
ER -
