頁籤選單縮合
題名 | 利用遙測影像分析太麻里地區山坡地農業變遷之研究=Using Remote Sening to Monitor the landuse Change of Hillside Agriculture in Taimali |
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作 者 | 蘇婉琳; 王文清; 王雪卿; | 書刊名 | 防災科學 |
卷期 | 2 2017.12[民106.12] |
頁次 | 頁125-142 |
分類號 | 432.7 |
關鍵詞 | 農地; 坡地災害; 衛星影像; 土地利用; Farmland; Hillside disaster; Satellite image; SPOT; Landuse; |
語文 | 中文(Chinese) |
中文摘要 | 農業是國家發展的根基,臺灣由於山地多平原少,平原耕地不足,再加上人口密度高,在社會與經濟快速發展下,對於山坡地開發的需求逐漸增高。目前山坡地大多為宜林地或宜農牧地交錯,在氣候變遷極端降雨及人為開發利用下,可能產生大小不等的崩塌與土石流災害。本研究利用 SPOT 多光譜衛星影像,藉由監督式分類方法分析 1994、2009、2017 年間,台東太麻里地區土地利用變遷之情形,並輔以 2005 至 2016 年間的歷史災害點位資料,探討山坡地土地開發與災害熱點之關聯。研究結果顯示,不論是 1994 至 2009 年間,亦或是2009 至 2017 年間,農地面積皆呈現下降的趨勢,但裸露農地與森林地則呈現增加的現象。此外,農地與裸露農地分布的範圍近年來有逐漸往更高的山坡地開墾的趨勢,並呈現破碎化開墾的情形,棲地破碎化的現象更加嚴峻。透過 2009年與 2017 年災害點位分析結果顯示,水患相關的災害仍以河道兩旁與地勢較低的聚落為主,但坡地災害近年來已逐漸深入山坡地與聚落沿線,在山坡地農地與裸露農地上都已有零星的災情出現。整體而言,透過本研究檢視 1994 至 2017年山坡地土地利用變遷之情形,有助於瞭解太麻里地區山坡地農業開發與災害位置之變遷。由於山坡地也是潛在的災害熱點區域,政府如何落實山坡地土地利用查定與管理規範,確保山坡地土地資源永續發展,以降低災害風險與損失,是目前重要的課題。 |
英文摘要 | Agriculture plays a strategic role in the process of economic development of a country. More mountains with less plain to cultivate and high population density result in high demands for hillside development in Taiwan. However, these hillside development could increace the vulnerability and be the high risk region of landside under extereme precipitation. This study used supervised classification to monitor long-term landuse change of Taimali in Taitung based on SPOT satellite images in 1994, 2009 and 2017. We also used historical disaster events during 2005-2016 to evaluate the effects of landuse and land cover on disaster. The results showed that the area of agriculture was decreased during 1994-2009 and 2009-2017, while the area of bare agriculture and forest were increased. Compared to the landuse in 1994, the extent of agriculture and bare agriculture in 2009 and 2017 were gradually spreaded into the high-elevated hillside with fragamented landscape, which could enhance the habitat fragmentation of forest. The flood-related disasters were majorly located along the river in 2009 and 2017, but the hillside-related disasters were spreaded into the high-elevated hillside and village. Overall, our study showed thatthere still has gap between the development and management in the hillside, and how to make the appropriate rules to manage landuse and land cover in the hillside is important for government to reduce vulnerability and matain sustainability. |
本系統之摘要資訊系依該期刊論文摘要之資訊為主。