Abstract
A similation model on the distribution of underground temperature was given on the basis of the investigation about underground temperature survey in the Matsunoyama landslide area. The results of its numerical analysis where as follows;
(1) If the velocity of underground water, is larger than 2×10-2cm/sec, the heat transmission caused by the flow of the water was very distinguished as compared with that by the heat conduction into the veinstream from soil mass. On the other hand, in situ, as its velocity in the Matsunoyama landslide area is 1.6×10-1cm/sec, it is presummed that the temperature of its flow direction is about the same temperature at the mouth of the vein-stream.
(2) In the Matsunoyama landslide area, the maximum value of difference between a normal temperature at the same depth, which is influenced considerably by the vein-stream, appears from August to September. Therefore, it is the most suitable to carry out the underground temperature survey on the period.
This similation involves some simplifies and assumptions. Therefore, in future, the model is discussed by using many data in situ and may be developed to the practical survey method.
