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83 results on '"ENDO, Kazuto"'

53. Soils recovered from disaster debris

Author

Katsumi, Takeshi, primary, Takai, Atsushi, additional, Inui, Toru, additional, Okawara, Masafumi, additional, Endo, Kazuto, additional, and Sakanakura, Hirofumi, additional

Published
2016
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Author

Katsumi, Takeshi, Ishimori, Hiroyuki, ENDO, Kazuto, Kamon, Masashi, Fukagawa, Ryoichi, Katsumi, Takeshi, Ishimori, Hiroyuki, ENDO, Kazuto, Kamon, Masashi, and Fukagawa, Ryoichi

Abstract

Performance of permeable reactive barriers for contaminated groundwater remediation was evaluated using FEM seepage analysis. The retention time and the capture zone were calculated on the funnel-and-gate systems (FGSs) having different geometries, in order to evaluate the effects of these geometries on the FGSs performance. Based on the calculated results, costs associated with the installation of funnel-and-gate systems satisfying a certain performance were obtained to estimate the cost-effective geometry. Finally, optimum design flow for FGS was proposed.

Published
2002

74. This title is unavailable for guests, please login to see more information.

Author

KAMON, Masashi, INUI, Toru, ENDO, Kazuto, ITO, Keijiro, KATSUMI, Takeshi, 60233764, KAMON, Masashi, INUI, Toru, ENDO, Kazuto, ITO, Keijiro, KATSUMI, Takeshi, and 60233764

Abstract

Performance of a caisson-type sea wall for the contaminant isolation of coastal disposal site was discussed in terms of released contaminant concentration and mass flux using the 2-D advection and dispersion analysis. The main concerns were I) the contaminant leakage through the defects in geomembrane and the joints of each caisson, ii) permeability of the backfill material, and iii) geometric install pattern of the impermeable sheet.

Published
2001

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Author

KAMON, Masashi, ENDO, Kazuto, KATSUMI, Takeshi, KAMON, Masashi, ENDO, Kazuto, and KATSUMI, Takeshi

Abstract

Migration properties of dense non-aqueous phase liquids (DNAPLs) in the subsurface can be expressed as a water-NAPL two-phase system based on the permeability (k), saturation (S), and pressure (p), similar to an unsaturated water-air two-phase system. This relation is called "k-S-p relation". In this paper, first, the concept of the migration processes under the liquid-liquid immiscible two-phase flow condition is presented. Second, to estimate the influence of the fluid properties and subsurface conditions on the k-S-p relations, the analysis for these parameters is performed by using the finite element code MOFAT. Finally, two-dimensional tank analyses in homogenous and heterogeneous subsurface conditions are performed for evaluating the effect of the rate of groundwater flow. This numerical results indicate the fundamental behavior of DNAPL migration under the two-phase flow system in the aquifer.

Published
2001

80. Geosynthetics Engineering Journal

Author

ENDO, Kazuto, primary, OKADA, Tomoko, additional, MIZUNO, Katsumi, additional, HONGO, Takao, additional, NISHIGAKI, Makoto, additional, and KAMON, Masashi, additional

Published
2004
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83. Experimental Study on the Measurement of S-pRelations of LNAPL in a Porous Medium

Author

Kamon, Masashi, Li, Yan, Endo, Kazuto, Inui, Toru, and Katsumi, Takeshi

Abstract

A simple and effective device for measuring saturation-capillary pressure relation (S-prelation) in LNAPL-water system is designed with electrical conductivity probes, hydrophilic tensiometers and hydrophobic tensiometers. With this device, the S-prelation in LNAPL-water system is characterized. The S-prelation in air-LNAPL system is obtained by a scaling factor method. At a given saturation of wetting phase, it is found that the descending sequence of capillary pressures is in the order of air-water, LNAPL-water and air-LNAPL systems. The descending sequence of entry pressure and displacement pressure is also in the order of air-water, LNAPL-water and air-LNAPL systems. Furthermore, the relative permeability of air is larger than the LNAPL in their corresponding aqueous two phase systems, and the relative permeability of the LNAPL is slightly larger than water in their corresponding gaseous two phase systems.

Published
2007
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