Abstracts for the 5th International GAME Conf.
3-5 October 2001
Aichi Trade Center
Nagoya Japan
Soil Physical Properties of Active Layer in Alas, Eastern Siberia
M. Mizoguchi (1), N. Kondo (2), H.Tanaka (3), H. Kiyosawa (4), H. Yabuki (5), Y. Ishii (6), T. Ohata (7)
(1) Department of Biological and Environmental Engineering, Univ. of Tokyo
(2) Masterfs Program in Biological and Environmental Engineering, Univ. of Tokyo
(3) Masterfs Program in Environmental Sciences, Univ. of Tsukuba
(4) Department of Bioresources, Mie Univ.
(5) Frontier Observational Research System for Global Change
(6) Institute of Low Temperature Science Hokkaido Univ.
(7) Institute of Low Temperature Science Hokkaido Univ./Frontier Observational Research System for Global Chang
Soil physical properties of active layer are important to understand the hydrological processes in permafrost regions. We have measured the soil physical properties in six soil profiles of active layer on a 500m-line in Ulakhan Sykkhan alas during the summer of 2000. The soil physical properties, such as temperature, bulk density, water content, electrical conductivity of soil pore water, hydraulic conductivity, hardness and ignition loss, had unique aspects for each pit and depth along the line of only 500 m distance. Especially, two facts are important to understand hydrology in alas; i.e. the saline soil layer exists in about 40 cm depth and not a few vertical macropores are built by insect in the area where frozen soil thaws fast. The distribution of such soil physical properties, including macropore, will control the thaw rate of frozen soil in alas.
Submittal Information
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Dept. of Biological and Environmental Engineering, University of Tokyo | |
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Yayoi 1-1-1, Bunkyo-ku, Tokyo 113-8657 | |
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mizo@soil.en.a.u-tokyo.ac.jp | |