Abstract
The writer investigated the actual conditions of the houses that were damaged by the flood caused by the heavy rainfall accompanying the Kanogawa Typhoon in the Kano River Basin. From the research, he tried to set up types of flood damage as follows:
Type a) Some private houses were buried and destroyed, others washed away by the debris flow owing fo landslides. Most settlements locating at dale side in the uppermost part of the river basin suffered from this type of damage. Type b) In the upper part of the basin, some settlements locating on the lower terraces were washed away by the overflowing flood. The primary cause of overflow is thought to be deposition of materials on the river bed at meander part of the river. Type c) In some cases, piers temporarily dammed up flood water until they were carried away by high water pressure accompanied with extraradinary flood wave. As the results of it, houses lying in the vicinity of bridges were swept away with this extraordinary flood wave. Type d) A number of hohses were away collectively due to the rip on the embankment in the alluvial lowland downstream of Shuzenji Bridge (Fig. 1). This type of damage caused a great loss of lives. As to the immediate cause of bank collaption, it is confectured to be the effect of extraordinary flood wave which rose after the washing away of Shuzenji Bridge. Type e) In the lowland area downstream of Chitose Bridge (Fig. 1) where water drains ill, a large number of houses were flooded above floor level by the inundated flow. However, few houses. were swept away and few lives were lost. Type f) In the lowermost part of the basin, the flood water of the main stream did not overflow its banks, but that of somet ributaries which were prevented from joining the main stream inundated in the urban area and numerous houses were flooded above floor board.
Among these types of flood damage, type c) expanded the scale of this disaster one. The residential shelter belt proved to be remarkably effective as a flood control (Fig. 5) and as to the structure of houses, such houses as built of stone and of anchor-bolt were effective in preventing them from disaster.
