粗坑溪生態環境調查與魚道規劃

The Survey of Aquatic Environment and Planning of Fishway in Tsukeng Creek

胡通哲(Tung-Jer Hu) ； 陳鴻烈(Hung-Lieh Chen) ； 林新發(Sing-Fa Lin) ； 林志訓(Chin-Hsun Lin)

《中華水土保持學報》 35卷3期 (2004/09) Pp. 197-210

https://doi.org/10.29417/JCSWC.200409_35(3).0002

摘要

本研究進行粗坑溪的生態環境調查與魚道規劃，在河川環境的調查項目包括有水溫、溶氧量、酸鹼值、濁度等水質項目，以及水深、流速、河寬與河床底質狀況等水文調查，在生態調查方面包括魚類、水棲昆蟲等項目。共有四個調查樣站，由上游至下游分別是三號壩上游、二號壩上游、一號壩上游與一號壩下游。根據調查結果，共有13種魚類、8目水棲昆蟲、3種蝦類，防砂壩應增建改良型舟通式魚道，以利魚類洄游，另外省道幹才橋附近至蘭陽溪會流口的河床應依低水河槽蜿蜓化的原則疏浚。

關鍵字

粗坑溪 ； 調查樣站 ； 改良型舟通式魚道

並列摘要

A survey of aquatic ecology and environmental items of Tsukeng creek was conducted. According to the investigations, the planning and design of a modified Larinier fishway (modified boat-passage fishway) were done. The investigation included the items: water temperature, DO, pH, turbidity, water depth, flow velocity, width, bed material of the creek, etc. For aquatic items, the fish and aquatic insects (macroinvertebrates) were investigated. There were four sampling station: (1) upstream from check-dam No. 3, (2) between check-dams No. 2 and 3, (3) at check-dams No. 2 and 1, and (4) downstream from check-dam No. 1. The results showed that the up-migration of fish was influenced by the blockage of the check-dam and the downstream-migration of fish was influenced by the restriction of the riverbed. It should be to improve this, a modified Larinier fishway should be established. The area at the intersection of Lan-Yang stream and Tsukeng creek should be dag deeper and improved for migrating fish.

並列關鍵字

Tsukeng creek ； sampling station ； modified Larinier fishway