Abstract
This paper reports on a study performed to develop a method of estimating the state of the flow of ground water within landslide slopes by adding statistical methods to the past organization method based on a graph of the results of a water quality investigation.
The following results were obtained.
(1) The study demonstrated an estimation method that finds the number of sources of the ground water flowing downwards in a landslide slope, the sources of this ground water, and the flow channel of the ground water by performing principal component analysis and cluster analysis of the results of a water quality investigation of the ground water.
(2) The results of a verification of the suitability of this estimation method done using test data revealed that the number of sources of the ground water and the percent of each of the ground water's components could be accurately determined as similarities.
(3) A trial application of the method at the Konota landslide demonstrated that it is possible to estimate the number of water sources of the ground water in the landslide rock, source of the ground water, and the ground water downward flow channels.
