Abstract
Recently we confront the contradiction that in urban areas people suffer from water shortage where rainwater not only cannot be utilized effectively, but also city flooding is caused. One of the solutions to this problem is to make better use of rainwater catchment systems. Such systems are becoming popular and well known as being useful for saving city water and preventing city flooding. The number of such systems is gradually increasing and in most cases large-scale ones are equipped in public buildings such as schools. Obviously, since their effect increases with the total capacity of those equipped, they must come into wide use even in individual houses. The number of local governments developing grant-in-aid programs to promote the diffusion of rainwater catchment systems continues to grow. The Internet is becoming so familiar that we can easily access information on web sites. With such a background, new questionnaire survey methods, termed electron survey methods, are proposed. In this paper, a system for collecting information on the present state of grant-in-aid programs by local governments and to examine its advantages and disadvantages is attempt.
