台灣位於歐亞大陸板塊與菲律賓海板塊聚合處，地質較為年輕破碎，又因氣候、人為因素，台灣山區不免常常受到邊坡崩塌災害的威脅，坡地崩塌帶來的災害造成山區人民的生命財產損失，故需要積極地去避免與監測。監測山區穩定的技術種類繁多，各有不同的優缺點。本研究來探討地基合成孔徑雷達(Ground-based synthetic aperture radar，GBSAR)用於台灣山區邊坡的監測。ku波段之GBSAR應用於植被茂密區域有所限制，需設法解決。ku波段因其波長較短，擁有比其他中長波段更高的精度，可達毫米等級，其對於變形的敏感度，運用於邊坡監測是相當有效。但也因其波長短，無法穿透植生觀察地表。雷達干涉技術依賴同調性進行處理，若同調性過低，則無法進行後續位移量計算。植生區域因樹葉晃動及散射特性，造成同調性不高，常使GBSAR監測無法通過同調性門檻。
本研究提出以帆布鋪設於植生區域，降低其粗糙度、減少散亂射，以提升同調性。設計兩項實驗證實帆布可於植生區域提升同調性，並於基隆新山水庫及高雄寶來崩塌進行兩次現場測試，提升同調性表現新山水庫提升七成，寶來崩塌甚至達三倍，以證實帆布提高同調性之能力。也比較了帆布與角反射器皆有提升同調性之能力，但帆布優勢在於其為面狀數據且較方便攜帶鋪設。最後，建置一款GBInSAR邊坡監測預警流程，同時導入S-GBSAR與C-GBSAR概念，期望節省人力、物力成本，並有效即時預警，提高防救災能量。

Landslide disasters are often occurred in the mountainous areas of Taiwan; due to climate and human factors and also relatively young and broken geology. Therefore, it require routine monitoring to avoid the loss of properties or life. There are various technologies for monitoring the mountainous stability with it’s own advantages and disadvantages. This study is to explore the use of Ku band ground-based synthetic aperture radar (GBSAR) for monitoring slopes movement in Taiwan. The radar signal of ku-band GBSAR scattered at vegetated areas thus limited its application, it is necessary to resolve it for acquiring high resolution result. Due to its shorter wavelength, the ku band has higher accuracy than other medium and long bands, reaching the millimeter level. Its sensitivity to deformation is quite effective when used in slope monitoring. But also because of its short wavelength, it cannot penetrate the vegetation for ground observation. Radar interferometric technology relies on signal coherence for processing the amount of deformation. If coherence is too low, displacement calculations cannot be performed. The swaying and scattering characteristics of leaves in the vegetation area result in low coherence, which often make GBSAR returning signal unable to pass the coherence threshold. This research proposes to lay an impervious plastic cloth ontop of the vegetation area to reduce its roughness, reduce scattered shots, and improve coherence. Field engineers apply the coverage of impervious plastic cloth to stop the water infiltration as first treatment where newly ground fractures occurred. Without adding any extra operation and also could obtained the data at hundreds meters away is the specialty of this setup. Designed two experiments to prove this arrangement could improve the coherence in the vegetation areas at two test sites in Keelung Xinshan Reservoir and Kaohsiung Baolai collapse, respectively. The improvement of the coherence performance in Xinshan Reservoir increased by 70% and tripled in the Bora collapsed even. To demonstrate the ability of impervious plastic cloth in improving the coherence, comparing this setup to the corner reflectors have been made. The advantage of using impervious plastic cloth is providing a surface-shaped data and it is more convenient to carry and lay for any emergent embedding region. Finally, by resolve the GBInSAR bad data quality problem in vegetated area, a slope monitoring and early warning process are introduced with concepts of S-GBSAR and C-GBSAR to save manpower and costs thus to improve disaster prevention.

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