長良川河口ぜき計画に伴なう堤防漏水調査

Abstract

In this paper we deal with the leakage problem of the levee at the Nagara riveraccompanied by the estuary weir plan. From the investigation it is found out that thehead after the weir construction may be as high as twice in the present situation. Fromthe experiments to examine the effect of five protective countermeasures, it may be con-cluded that the blanket method or the sheet pile method produces considerable effect, andthat the drainage culvert method indicates much effect; possively keeping the presentstate even if the head of the culvert is controlled to 20 cm-30 cm under the ground surface.