積雪寒冷地帯における気象変動と地盤災害の変動(<小特集>気象変動と地盤工学)

概要

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To investigate meteorological variations and their related geotechnical disasters in snowy and cold regions, various kinds of meteorological data are couected and ana-lyzed. It is found that landslides tend to occur in the thaw season and are increasing in recent years. And the accumulated snow cover depth, the maximum depth of snow cover and the daily minimum air temperature have periodical fluctuations but they are deviating from their periodicities recently. According to the analyses using the newly defined factor, I., the severest winter is that in 1945 and the warmest one is in 1989. It is found that the air temperature in the mid winter has been rising remarkably since 1945. Particularly, in Sapporo, an increase of 3 'C in temperature has been recorded for the period of these 50 years. Moreover, the freezing index is also getting lower. A warming phenomenon is certainly recognized even in the snowy and cold regions in Japan.
社団法人地盤工学会の論文
2001-01-01