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| Title: | 應用遙感探測技術偵測海岸變遷情形----以臺中市大安區為例
Application of remote sensing technique in coastal changes detection—A case study of Da’an District in Taichung City |
| Authors: | 何昀儒
Ho, Yun-Ru |
| Contributors: | 詹進發
Jan, Jihn-Fa
何昀儒
Ho, Yun-Ru |
| Keywords: | 海岸變遷
機器學習
影像分類
Google Earth Engine
遙感探測技術
Coastal changes
Machine learning
Image classification
Google Earth Engine
Remote sensing technology |
| Date: | 2024 |
| Issue Date: | 2024-09-04 14:28:44 (UTC+8) |
| Abstract: | 海岸提供人類休憩、建立經濟活動之地理環境。但海岸變遷一直以來是人類對於環境保育議題所關注之焦點，特別是臺灣本島西部砂岸地形，藉由自然與人為因素，其改變地貌之幅度大於岩岸地形，海岸地形之變遷除了破壞海岸地景之美貌，更容易對當地經濟活動產生影響。
本研究旨在應用遙感探測技術和機器學習方法，分析臺中市大安區海岸地區於2002年至2022年間之變遷情形。本研究利用2002年Landsat 7、2014年Landsat 8及2022年Sentinel-2A衛星影像，選擇支持向量機、隨機森林和極限梯度提升三種機器學習方法進行監督式影像分類，並選出各年度分類精度較高之成果，進而分析海岸土地利用/土地覆蓋（LULC）變遷及海岸線變遷情形。
研究結果顯示，於2002年至2022年之間，大安區海岸之LULC類別，主要以水體與濕地，及植生與人工建物之間之轉變較明顯。而海岸線於2002年至2014年，皆有明顯的前進趨勢，主要集中在溫寮溪口及大安沙丘一帶；而2014年至2022年，海岸線則出現了退縮現象，特別是在大安濱海樂園、北汕海堤一帶。依據上述結果，推測大安區海岸二十年間人為開發興盛，但也因此使海岸地貌產生明顯變化。
本研究之結果可為有關部門提供參考依據，協助其制定更有效之海岸管理和保育策略，並作為未來海岸變遷相關研究之參考。
The coast provides a geographic environment for human recreation and economic activities. However, coastal changes have always been a focal point in environmental conservation issues, especially on the sandy coastlines of western Taiwan. These changes, driven by both natural and human factors, are more significant than those on rocky coastlines. Coastal geomorphological changes not only damage the beauty of coastal landscapes but also easily affect local economic activities.
This study aims to analyze the changes in the coastal area of Da’an District, Taichung City, from 2002 to 2022 using remote sensing technology and machine learning methods. The study uses satellite images obtained by Landsat 7 (2002), Landsat 8 (2014), and Sentinel-2A (2022), employing three machine learning methods—Support Vector Machine (SVM), Random Forest (RF), and eXtreme Gradient Boosting (XGBoost)—for supervised image classification. The classification results with higher accuracy for each year were selected to analyze the coastal changes in Land Use/Land Cover (LULC) and coastline.
The results indicate that between 2002 and 2022, the LULC categories in the coastal area of Da’an District showed significant changes, primarily between water bodies and wetlands, and vegetation and artificial structures. The coastline exhibited a noticeable advancing trend from 2002 to 2014, mainly located around Wenliao Creek and Da’an Sand Dunes. However, from 2014 to 2022, the coastline showed signs of retreat, especially in the areas of Da’an Seaside Paradise and Beishan Seawall. Based on these findings, it is inferred that the flourishing human development in the past two decades has significantly altered the coastal geomorphology of Da’an District.
The results of this study can provide a reference for relevant departments to assist in formulating more effective coastal management and conservation strategies, and serve as a reference for future research on coastal changes. |
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| Description: | 碩士
國立政治大學
地政學系
111257031 |
| Source URI: | http://thesis.lib.nccu.edu.tw/record/#G0111257031 |
| Data Type: | thesis |
| Appears in Collections: | [地政學系] 學位論文
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