流木の流出防止を目的とした渓流および谷底河川沿いのケヤキの植林に関する研究
キーワード:
Zelokova,
afforestation,
mountain stream,
ravine rivers,
prevent work of outflow of driftwood
2009 年 15 巻 p. 171-176
詳細
2009 年 15 巻 p. 171-176
Recently, outflow of the driftwood which originates in bank erosion and slope failure occur frequently. At Miyagawa of Mie prefecture the flood of the highest flow in observation history occurred in October 2004. In this flood, the cedar forest which is afforested to the side bank flowed out with stream bank erosion, but, the zelkova tree which has grown in the side bank did not flow out withstanding the flood.
From this circumstance, as for this study, the judgment whether afforestation of the zelkova tree in boundary of the river in order to control the occurrence of the driftwood is effective, and, history of afforestation of the zelkova tree and propagation circumstance etc of the zelkova tree were investigated.
