生態工法應用於都會型農水路之探討

生態工法應用於灌排渠道尚屬起步階段，本文以葫蘆墩圳爲研究對象，探討都會區幹線級潑排水路應用生態工法之設計及施工限制，施作工法包含預鑄生態塊石背填碎石工法、預鑄生態塊石背舖不織布工法、乾砌卵石坡面工法、複式斷面乾砌卵石主法及慣用混凝土主法等，並以生物個體數量爲比較參數及Shannon-Weaver Index、Pielou's evenness Index、Margelef's Index等指數評估週期性停水輪灌施工法對棲地生物之影響；結果顯示棲地物種包含魚類、蝦蟹類、兩棲類等皆受施工期之干擾影響，物種及數量皆呈現減少趨勢，施工後以魚類的回復速度最快，蝦蟹類、兩棲類次之。

關鍵字

生態工法；預鑄混凝土生態塊；水理演算；生物指標；都會型灌區

並列摘要

The ecotechnology applied to the irrigation canal system in Taiwan is still in the toddle stage. With the Hu-Lu-Dun canal as a research object, the context was investgated the design and construction limitation for the application of ecotechnology to main canal of urban irrigation area. The five discussed construction works were included pre-cast ecological concrete blocks with gravel filled in the back of revetment, pre-cast ecological concrete blocks with non-weave-sheet lay in the back of revetment, lay dry gravel on the surface, hi-section of lay dry gravel on the surface and also the accustomed concrete construction work. With the amount and Shannon-Weaver Index, Pielou's Evenness Index, Margelef's Index of creature investigation, the context was estimated the influence to habitat because of the suspend water supply periodly. The results show that habitat creatures including fish, shrimp, crab, amphibian are interfered during the construction time. The species and it's amount appear the tendense of decline. The recovery of the fish is the quickest among the species after the construction, the shrimp and crab are next to the fish, and the amphibian is the last one.

並列關鍵字

Ecotechnology ； Pre-cast ecological concrete blocks ； Hydraulic routing ； Biotic index ； Urban irrigation area

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生態工法應用於都會型農水路之探討

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