NAME Keisuke Murakami
TITLE ””A Study about presumption of characteristic of soil in Kherlen river basin in
country of Mongolia
Supervisor Lu Minjiao
In recent years, Northeastern Asia that centers on Mongolia and Northeastern China are changing from the wet region to a dry region at relatively narrow range.Accompany with it,there formed clear area in ground that it likes forest-grassland-desert. The overpasturing is a problem in the pasture like Mongolia.Because this influence differ,there need to study of best control methods and grasp of soil characteristic about each ground.
Ever,estimate of thermal conductivity apply to experience epuption(De Vries,1963) in study and report.but weght factors is equal in 1,because data is lack for it estimates.But data such as temperature and volumetric water content of soil was observed by RAISE project in recent years.This time study estimated of thermal conductivity by these data,and study about weight factors equal to 1 is right number.
Another,braking depth was estimated.It is better index about temperature wave of cycle of day and annual spread until any depth.It was comfirmed that temperature wave not spread until deep. Thermal conductivity was estimated by day braking depth.It comparison with to thermal conductivity from experience epuption.Then enviorment of thermal and water can”Ēt correctly estimate for waight factor is 1.So waight factor is estimate.thermal conductivity estimate by experience epuption agan.Then it can be approximation to thermal conductivity by day braking depth.On Kherlenbayan-Ulaan,thermal conductivity can estimate about any volumetoric water content of soil by its weight factor.
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