Premium
Coseismic spring flow changes associated with the 1995 Kobe Earthquake
Author(s) -
Sato Tsutomu,
Sakai Ryutaro,
Furuya Kazuo,
Kodama Toshio
Publication year - 2000
Publication title -
geophysical research letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.007
H-Index - 273
eISSN - 1944-8007
pISSN - 0094-8276
DOI - 10.1029/1999gl011187
Subject(s) - geology , spring (device) , permeability (electromagnetism) , aquifer , thermal diffusivity , volumetric flow rate , flow (mathematics) , geotechnical engineering , seismology , groundwater , mechanics , mechanical engineering , engineering , genetics , physics , quantum mechanics , membrane , biology
Flow rate in many springs increased rapidly after the 1995 Kobe earthquake, which is likely caused by permeability enhancement. The flow rates at nine springs on Awaji Island near Kobe from 1995 to 1998 reveals that the enhancement of flow rate gradually decreased exponentially within two years. The enhanced hydraulic diffusivity of the aquifer is estimated at from 130 to 2,300 cm²/s by using a very simple diffusional model. About seven‐fold increase in spring flow rate and permeability due to the earthquake is inferred from the analysis.