A case study of flood control schemes for the Kakehashi river and their socio-cultural consequences
SUMMARY This paper is concerned with a twenty-five year campaign against the relocation of the Komatsu-Tenmangu shrine as a result of the enlargement of the Kakehashi river. The Komatsu-Tenmangu shrine is an important cultural property of Japan, and was constructed by Toshitsune Maeda, the third dynasty of the Kaga clan in 1657. It is suggested that the primary reason why it took so long to settle this issue is a flaw in our social system for managing public works. It is concluded that preservation of cultural property is not always contrary to land development, and that the proposed procedures or something like them must be put into practice for the real expansion of our culture.
A flood alleviation of the Kakehashi Basin, Japan
A flood alleviation scheme is proposed for the Kakehashi basin, Japan. The scheme consists of one diversion channel, four retarding basins and one dam. The region between the diversion channel and the Kakehashi river is protected from floods. The measures proposed make it possible to achieve flood alleviation whilst minimising changes of the Kakehashi river, and impacts on historical environments and cultural properties. It is emphasized that preservation of the sinuous channel of the Kakehashi river must play a key role in future management because of the physical, biological and aesthetic advantages when compared with a straight stream channel.
Dimensional Errors of Fixtures, Locating and Measurement Datum Features in the Stream of Variation Modeling in Machining
Machining processes are usually multi-station processes involving a large number of operations and several locating datum changes. Machining errors are thus introduced, transformed and accumulated as the workpiece is being machined. This paper introduces procedures for expressing the influence of errors in fixtures, locating datum features and measurement datum features on dimensional errors in machining. These procedures are essential in the derivation of the Stream of Variation model of dimensional machining errors using the CAD/CAPP parameters of the machining process. The linear state space form of the Stream of Variation model allows for advanced control theory achievements to be employed in formal solutions to problems in multi-station machining. Modeling procedures presented in this paper were experimentally verified in machining of an automotive cylinder head.