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宜蘭無尾港濕地全湖調查及陸化原因探討

Tidal Current Investigation and Relevant Reclamation Identification of the Wu-wei-kang Wetland

Abstracts


本研究針對宜蘭無尾港濕地近年發現的濕地陸化現象進行調查及模擬分析,選定由溼地到港口大排及新城溪的六處樣點,與在地保育團體合作,以全潮測量方式調查一個完整潮週的水位及流速資料,並以HEC-RAS模式模擬分析六連閘門操作方式,對濕地之水位、潮流量及潮流體積的影響,除進行現況流況分析外,另模擬六連閘門全開的預案流況。研究發現,本區入流濕地之潮流量遠大於平時港口大排及上游湧泉區入流濕地的淡水流量:閘閥門全開讓潮水自由進出的方式,能維持雁鴨科水鳥喜好之水深條件,有助於緩解無尾港濕地暴露於濕地陸化的風險。現況與預案50%浸淹機率之水深分別為0.17m與0.39m,相差可達0.22m,由此可知六連閘門的啟閉方式,將直接影響無尾港濕地的水文狀態,以濕地保育的觀點而言,應儘速建立適當的水閘門操作規範。

Keywords

無尾港 濕地 陸化 全潮調查 水理模擬

Parallel abstracts


This study aims to explore the reclamation causes of the Wu-wei-kang wetland. It cooperates with a local conservation organization, and adopts the tidal current investigation to measure the water level and velocity at six points from Kang-kuo canal to the Hsing-cheng creek. The hydrodynamic model, HEC-RAS, was used to examine the scenario analysis of the operation for the water gate connecting the river and its influences. Water level, velocity, tidal current quantity and volume were simulated and calculated. The results show that the tidal current quantity flowing into the wetland is far larger than those freshwater from upstream of the Kang-kou canal and spring. It also reveals opening the gate to allow free flowing in and out for the tidal current can maintain a favorite habitat with proper water level for the wild ducks, which will help to reduce the risk of this wetland on reclamation.

Cited by


鍾明光、盧道杰、蔡博文、周桂田、婁安琪、徐健銘(2020)。利用公眾參與地理資訊系統協助環境資源經理中的風險溝通:以宜蘭縣無尾港水鳥保護區之社區監測為例地理學報(97),77-113。https://doi.org/10.6161/jgs.202012_(97).0003
陳映璇(2016)。結合敘述性偏好與顯示性偏好資料評估淡水河流域紅樹林濕地遊憩價值〔碩士論文,國立臺北大學〕。華藝線上圖書館。https://www.airitilibrary.com/Article/Detail?DocID=U0023-1303201714253784

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