A consideration on intensity of odor in natural slopes and the release of odor at landslide disasters

Tsuchida, Takashi; Yuri, Hiroki; Kano, Seiji; Nakayabu, Kyosuke; Yabuki, Kentaro; Hanaoka, Takashi; Kawabata, Shoichi

doi:10.3208/jgs.8.339

Cited by 1 publication

(2 citation statements)

References 3 publications

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“…Although it is known that the generation of offensive odors is an omen of debris flow disasters, there are very few studies on the physical mechanism by which the generation of odor is a precursor of landslide disasters. As a basic survey to clarify this point, Tsuchida et al measured the odor intensity in the ground on the natural slope where the surface layer of 0.5m to 5m is covered with Masado [8]. Masado, a sandy soil formed by weathering the granite, is common in western Japan and almost every year the debris flows are caused by heavy rain [9], [10].…”

Section: Introductionmentioning

confidence: 99%

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Experimental Study on the Generation of Odor During Rainwater Infiltration Process

Tsuchida¹

2023

GEOMATE

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Although it is known that the generation of odor is one of the precursory phenomena of landslide disasters, the mechanism by which offensive odors are detected before landslides is not fully clarified. It has been reported that high odor intensity was observed from the pore air in soil at 0-3m depth on natural slopes with a history of landslide disaster history. In this study, laboratory experiments were conducted to examine the possibility of the generation of odors during rainwater infiltration process. We made a model ground mixed with odorants and conducted the following two experiments, 1) measurement of odor intensity on the surface of 10 cm height soil layer when the groundwater level rose by injecting water from the bottom, 2) measurement of odor intensity on the surface during rainwater infiltration process using a 1 m height soil layer and a laboratory rainfall device. From these tests, it was found that there is no or very little increase in odor intensity on the surface in the process that the pore air in soil was released from the surface accompanied by the rainwater infiltration. However, in both tests, the measured odor intensity increased rapidly when the ground water level approached the surface. It can be said that the generation of odor as a precursor phenomenon can be caused when the level of groundwater containing odorants reaches near the ground surface.

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Section: Introductionmentioning

confidence: 99%

“…Fig.2Measurement method of underground odor intensity using penetration holes of lightweight dynamic cone penetration test[8] …”

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confidence: 99%

Experimental Study on the Generation of Odor During Rainwater Infiltration Process

Tsuchida¹

2023

GEOMATE

View full text Add to dashboard Cite

show abstract

A consideration on intensity of odor in natural slopes and the release of odor at landslide disasters

Cited by 1 publication

References 3 publications

Experimental Study on the Generation of Odor During Rainwater Infiltration Process

Experimental Study on the Generation of Odor During Rainwater Infiltration Process

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