Notes on Surface Image Characteristic of Debris Flow

2008-05-14T05:52:10Z

2008-05-14T05:52:10Z

2003-03-01

Nowadays, debris flows cause a lot of damage all over the world.　The surface image of the flow, which is recorded by video recorder　is one of the most important data in drawing a hazard map or　constructing a sediment control dam. So far, authors have proposed an AR（Auto Regressive）type image model of a surface image of　debris flow, and evaluate various measurement methods by using the　artificial random image model. Since the parameters of the model is　determined experimentally, it is not known that the artificial image　exactly simulate the surface image of debris flow. In this paper, first　we estimate the parameter of the image model by the least square　error criterion from the real debris flow image. Second, we study　some characters of the surface image of the debris flow such as　particle size of the image, and isotropy of the image, etc. from the　obtained model. As the result, we conclude that the particle size of　the debris flow image is estimated correctly from our model in most　cases, and the surface image of the many debris flows are not　isotropic.

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京都工芸繊維大学　工芸学部研究報告　第５１巻　理工・欧文(2002) pp.21-33

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http://hdl.handle.net/10212/1735

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