Presentation	1999/10/26 Detection of mole's hole and under drain in paddy field YOUICHI OHTA,
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Abstract(in Japanese)	(See Japanese page)
Abstract(in English)	It has been considered that locating the abandoned drain pipes and the holes dug by the moles which cause water leakage under the bottom of the paddy field is extremely difficult. This paper describes how those technical difficulties, especially, in the Japanese paddy field where the radio propagation attenuation is considered to be greater than conventional soils, have been solved and how the improved performance have had been tested at various paddy field around Japan. In conclusion, it is reported that the attenuation at the very wet clay in the paddy field of Hachirogata were greater than that of relatively wet clay of the paddy field in Tsukuba City which has similar electrical conductivity of the Kanto Loam.
Keyword(in Japanese)	(See Japanese page)
Keyword(in English)	Paddy field / Under drain / Mole drain / Mole / Heavy clay
Paper #	SANE99-84
Date of Issue

Conference Information
Committee	SANE
Conference Date	1999/10/26(1days)
Place (in Japanese)	(See Japanese page)
Place (in English)
Topics (in Japanese)	(See Japanese page)
Topics (in English)
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Vice Chair
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Assistant

Paper Information
Registration To	Space, Aeronautical and Navigational Electronics (SANE)
Language	JPN
Title (in Japanese)	(See Japanese page)
Sub Title (in Japanese)	(See Japanese page)
Title (in English)	Detection of mole's hole and under drain in paddy field
Sub Title (in English)
Keyword(1)	Paddy field
Keyword(2)	Under drain
Keyword(3)	Mole drain
Keyword(4)	Mole
Keyword(5)	Heavy clay
1st Author's Name	YOUICHI OHTA
1st Author's Affiliation	KODEN TECHNO INFO()
Date	1999/10/26
Paper #	SANE99-84
Volume (vol)	vol.99
Number (no)	390
Page	pp.pp.-
#Pages	5
Date of Issue