In:
Japanese Journal of Applied Physics, IOP Publishing, Vol. 25, No. S1 ( 1986-01-01), p. 115-
Abstract:
A system which measures the variation of underground water level in a bored hole using ultrasound is proposed. The principle of the measurement is the ultrasonic pulse echo method. A transducer is hung in the underground water and sends 1 MHz of ultrasound with a 50 µs pulse width upward to the water surface. The equipment has the ability to measure a depth of about 15 m with almost 3 cm resolution. An experiment using a telemeter system was carried out in a landslide area where there was much snow and no commercial power supply; the rising of the water level was observed with the thawing of the snow.
Type of Medium:
Online Resource
ISSN:
0021-4922
,
1347-4065
DOI:
10.7567/JJAPS.25S1.115
Language:
Unknown
Publisher:
IOP Publishing
Publication Date:
1986
detail.hit.zdb_id:
218223-3
detail.hit.zdb_id:
797294-5
detail.hit.zdb_id:
2006801-3
detail.hit.zdb_id:
797295-7
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