坡地災害潛勢區土地開發適宜性之評估

Assessment on Land Development Suitability in Landslide Disaster Potential Area

吳政芳(Cheng-Fang Wu)

指導教授 ： 陳怡睿

長榮大學/管理學院/土地管理與開發學系(所)/碩士(2011年)

https://doi.org/10.6833/CJCU.2011.00081

摘要

近年來，受到都市人口成長壓力與經濟產業發展帶來生活型態結構變遷的影響，原屬於較低經濟價值與脆弱之邊際土地資源，皆成為土地開發的主要對象。一般而言，山坡地的開發利用，除必須考量地區之自然環境特性，還得考量其發展潛力及發展限制因素。本研究以台灣東部之花蓮縣鳳林鎮為研究範圍，就其土地開發利用的適宜性進行分析。臺灣東半部大多屬坡地，且經常為颱風必經的路徑，加上花東縱谷正位於板塊交界地帶，因此也是地震發生頻繁的地點，每當颱風過境或地震發生時幾乎都會對東部地區造成嚴重之坡地災害，並導致生命財產之重大損失。
本研究配合所蒐集研究地區之基本圖層相關屬性資訊以地理資訊系統，建立環境及基本圖層資料庫。研究中並選定山坡地開發適宜性影響因子，運用關聯性矩陣方法分析與探討研究區之發展潛力及限制。透過發展潛力與限制兩者等級評定的整合考量，劃設出研究區之開發程度適宜性。
結果顯示，本研究依土地開發適宜性分析準則將研究區坡地開發程度劃設為三個等級，再配合法令與實際土地使用狀況提出建議之土地利用適宜性等級。其中，高土地利用適宜性之區域主要分佈於研究區西半部的都市計畫區內；中高土地利用適宜性區域則零散分佈於研究範圍內及都市計畫區周圍，而中低土地利用適宜性區域則佔研究範圍內大部分的區域，其餘低開發適宜性之範圍，則不建議開發使用。本研究之結果可作為土地開發時的參考依據。

關鍵字

坡地災害 ； 地理資訊系統 ； 關聯性矩陣 ； 土地開發適宜性

並列摘要

In recent years, the vulnerable area with low economical value has been considered to develop due to the population growing pressure in urban area and the development of technology and economy. In general, natural environmental characteristics and potential and limitation of development must be considered in the sloping land use. In this research, the land development suitability in Fonglin of Hualien was evaluated. Most of land in eastern Taiwan is hillside. After typhoons, rainstorms and earthquakes, large-scale sediment disasters such as landslides, debris flow, etc., threaten lives and properties of local residents.
Geographic information system was employed to establish environmental and essential map database. Some affecting factors of sloping land development suitability were selected and correlation matrix was used to explore the potential and limitation of the development in research area. Finally, the development suitability in research area was configured according to the evaluated levels of potential and limitation of the development.
The sloping land development suitability was classified to three levels by using criteria for the analysis of the land development suitability. Then, with corresponding ordinances, current land use and transportation situation, the classification of land development suitability was proposed. The area with high land development suitability is mainly distributed in urban planning district, the western half of the research area. The area with medium-high land development suitability scatters in the research area and around the urban planning district. The area with medium-low land development suitability occupies the most part of the research area. The rest area with low land development suitability is not supposed to be developed. The time saving level classification in sloping land development process constructed in this research can be applied in practice as a guide before real land development.

並列關鍵字

sloping land disaster ； geographic information system ； correlation matrix ； land development suitability

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