6:15 PM - 7:30 PM
[HCG35-P05] Subsurface structure around Oumi basin
Keywords:alluvium, borehole, database, sedimentary environment
Because the topographical and geological characteristics of the basin obviously change for each local area, the sedimentary facies are also complicate and difficult to be generally evaluated. So the discussion has been focused about mainly the eastern and western part of Lake Biwa.
The eastern part of Lake Biwa has the largest plain in the Basin. The freshwater clays distribute continuously under the deltaic deposit in the southeast, while the beach ridge and its back marsh are formed along the northeast lakeside. The soil properties of the reclaimed lagoons and back marsh are specially soft and weak clays.