藤枝林道莫拉克災損情形調查

The Investigation of Tengjhih Forest Road Disaster Conduction after Morakot Typhoon

許中立(Chung-Li Hsu) ； 吳重君(Chon-Gin Wu) ； 施保呈(Bou-Chun Shih) ； 林秀勇(Sho-Yon Lin)

《水保技術》 5卷2期 (2010/04) Pp. 105-117

https://doi.org/10.30040/JSWCT.201004.0005

摘要

藤枝林道受到莫拉克颱風所帶來的超大豪雨影響受損將近1/3，影響森林保育工作與附近社區的進出交通。此次林道肇災大多因排水不良及小蝕溝受超大降雨引起底部縱橫向沖蝕，再引致上方邊坡大範圍崩塌的結果。今後林道整治除復建路基外，路基上下邊坡之蝕溝亦應一併處理爲宜。又過去爲了通行大客車與遊覽車，因而造成較大的邊坡挖填與轉折彎曲，使得林道的維護費用居高不下，未來復建是否仍要維持如此的路寬與設計等級，應請主管機關多方考量儘早決策，以利後續復建工作的推動。

關鍵字

莫拉克颱風 ； 林道 ； 蝕溝 ； 崩塌

並列摘要

Tengjhih forest road had nearly damaged 1/3 long for Morakot typhoon bring the influence of ultra torrential rainfall. Influence forest conservation works and business turn over traffic of the nearby community, directly. It is caused to the mostly bad drainage and vertical and horizontal bottom erosion conduction by the ultra torrential rainfall in the forest road area this time, the result cause a large scale landslide on above slope. Beside to rebuild road foundation on the forest road rebuilding in the future and the gully in the above and down slope of road foundation should also be treated together. In the past the motor bus and bus for tourists in order to pass through, therefore cause the slope need larger side to dig and fill out and transfers crookedly and make maintenance expenses remain high of forest road. It must detail consider of rebuild and still keep the way like this road wide and designing grade in the future. The government of competent authority should consider and deicide as soon as possible in any ways for the pushing of rebuild works so as to favorable follow-up.

並列關鍵字

Morakot Typhoon ； Forest Road ； Gully ； Landslide