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Use of Temperature Profiles and Stable Isotopes to Trace Flow Lines: Nagaoka Area, Japan
Author(s) -
Salem Zenhom Elsaid,
Taniguchi Makoto,
Sakura Yasua
Publication year - 2004
Publication title -
groundwater
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.84
H-Index - 94
eISSN - 1745-6584
pISSN - 0017-467X
DOI - 10.1111/j.1745-6584.2004.tb02453.x
Subject(s) - groundwater recharge , borehole , stable isotope ratio , groundwater , hydrology (agriculture) , infiltration (hvac) , isotope , geology , environmental science , period (music) , atmospheric sciences , aquifer , meteorology , geotechnical engineering , geography , physics , quantum mechanics , acoustics
In this study, we use borehole temperature data and stable isotopes to delineate the flow system and estimate the effect of urbanization in the Nagaoka area of Japan. Temperature profiles were measured four times in observation wells during the period 2000–2001 and compared with those measured in the same wells during the period 1977–1983 (Taniguchi 1986). Water was sampled in both observation and pumping wells during the same period. The temporal and spatial variability in temperature indicate clearly the effect of urban warming and heavy pumping on the ground water system. Urban warming caused higher temperatures recently as compared to the older values, and pumping caused induced recharge from the river to the ground water. The stable isotope data show the ground water flow system is divided into shallow, intermediate, and deep systems, and that land use and infiltration rate are affecting the shallow flow system.