Abstract
In case of water power development in Japan, so far, the aerial.photogrammetry has scarecely been applied but to make the topographical maps for planning. We, authors, thought that aerial photography should be utilized not only for the purpose above said but also for many other purposes generally in water power development. Then we introduced a new technique called “Photogeology” and have carried out the investigations and studies, by the techniques, on each area in the basin of the River Kurobe, for the development plan.It seems that photogeology has never been applied really to civil enginneering in Japan. Therefore, in performing this research we had to resolve the elementary problems at first. And we have carried on the application in a way of “try and test”.In this paper, we show a research on the Omachi tunnel area above all as an instance.An unexpected fault fracture zone caused a paralysis of the tunneling work through several months and enormous loss. This paper deals with how that fault fracture zone on aerial photographs appears and how the aerial photography in planning such tuneling works should be utilized in the future.
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