兵庫岡山 7水系における固定堰の親水利用の可能性についての研究

概要

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The objective of this study is to clarify the differences of usability for water-familiar activities among the cases of the fixed weirs, considering a variety of riverbank conditions as well as the spatial features of the weirs. The sixty-three weirs of the seven rivers within either Hyogo or Okayama prefectures were surveyed on-site, and their usability were analyzed on assuming two types of water-familiar activities; one from the outside and the other on the weir itself. The findings are; a) Seven weirs are usable only from the outsides, three only on themselves, and fifty-one for both types while two for none of them. b) The numbers of view points, the visible areas of the weir bodies, and the areas of the river water overflowing the bodies are different among the cases usable from the outsides. c) The numbers of access points, the difficulty of entries, the radius for activities and the length of the watersides touchable on the weir bodies are different among the cases usable on themselves. d) The factors of the differences also come out, such as visibility of weirs from riverbanks and bridges, quantity of water flow on weir surfaces, accessibility for public to weirs, sectional forms of weirs and levels of weir surfaces compared to both top and bottom of the river water.