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ID 16608
file
title alternative
Measurment and analysis of unconfined groundwater quality in the alluvial fan of Koto river
creator
Hashimoto, Michiko
Yoshikawa, Seiko
subject
nitrate nitrogen
unconfined groundwater
stable isotope of nitrogen
inorganic fertilizer
organic fertilizer
NDC
Construction. Civil engineering
abstract
Contamination of unconfined groundwater by nitrate nitrogen has been reported at several locations in the Takamatsu plain. To understand the mechanism and the extent of groundwater contamination, a target region in the plain was selected where the nitrate nitrogen has shown high concentration throughout the year. Intensive field measurement of groundwater level, EC, pH and the analysis of major ions in the groundwater were performed seven times in 2004 at twenty four shallow wells. The rate of stable isotope of nitrogen was also analyzed at two different seasons. The obtained data clarified that the nitrogen in the unconfined groundwater from the ground surface has been not only inorganic nitrogen but organic. It was also indicated that the fertilizer in the greenhouses for vegetables and waste water from a cow barn in the target area have been the major sources of the nitrogen.
journal title
水工学論文集
volume
Volume 50
start page
277
end page
282
date of issued
2006-02
publisher
土木学会
issn
0916-7374
ncid
language
jpn
nii type
Journal Article
HU type
Journal Articles
DCMI type
text
format
application/pdf
text version
author
department
Graduate School of Engineering