Study on Making Hazard Map in the Region where Many Irrigation Ponds Are Located

在灌溉池较多的地区，绘制灌溉池崩塌洪水危险图是十分重要的。笔者通过问卷调查的方式，收集了各县编制灌溉池塌陷危险图的资料。因此，有少量的危险地图。此外，制作地图的方法及其实际用途也是多种多样的。其次，笔者研究了几个先进的例子，阐明了制作地图的成功因素和需要注意的事项。结果如下：地方政府应该在技术和成本上做得更好。应该在一些有效的措施中选择最适合每个预算的技术。当地政府结合当地居民制作危害图（车间法）是非常有效的。在这种情况下，工作坊的推动者和居住者的危机意识是成功的关键。毕竟，在绘制危险地图时，必须考虑到该地区的特点。为了实践这一点，必须需要某些类型的手册，并且作者可能会准备它们。

In the region where many irrigation ponds are located, making hazard map for flood caused by collapse of the pond is very important. The author gathered information on making hazard map against collapse of irrigation pond by questionnaire toward all prefectures. As a result, there are a small number of the hazard maps. Also, ways to make the map and their practical uses are various. Next, the author researched several advanced examples to clarify successful factors and considerable matters to make the map. The results are as follows. Local government should be doer to make the map both in techniques and cost. The most suitable technique for each budget should be chosen among some effective measures. It is very effective that local government in connection with local habitant makes hazard map (workshop method). In this case, facilitator of workshop and habitants' consciousness of crisis are keys to success. After all, in making the hazard map, characteristics of the region must be considered. To practice this, some types of manuals must be needed, and the author may be possible to prepare them.