Characteristics of Landscape at Both the Intakes and the Main Canals of Historical Oblique Weirs

Case Studies of Oide-yosui and Horikawa-yosui

Abstract

Photographs toward the upper and the lower streams were taken at intervals of 100m from the intakes through the ends of main canals of Ooide-yosui and Horikawa-yosui, both of which had their origins before modern times. The photographs were traced and analyzed about the elements and the compositions of the scenes. About the photographs taken at the intakes, the comparative analyses of the composition of weir bodies, river channels, and clusters of summits were made, and it became clear that the weirs' locations and forms rational for stable water intakes had appeared in the scenes as common features. Moreover, about the photographs along the main canals, the analyses of the composition of channels, clusters of summits, rice fields, and diversion facilities were made, and it was shown clearly as common features that the ways of watering corresponding to topography had appeared in the scenes.