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    Please use this identifier to cite or link to this item: https://nccur.lib.nccu.edu.tw/handle/140.119/52334


    Title: 多時序三維空間資訊於地層下陷監測及分析---子計畫：以空載光達技術進行地層下陷監測之研究(III)
    Other Titles: Land Subsidence Monitoring Using Airborne Lidar Surveying Technique(III)
    Authors: 邱式鴻
    Contributors: 行政院國家科學委員會
    國立政治大學地政學系
    Keywords: 地層下陷;監測;空載光達;數值地型模型
    Land subsidence;Monitoring;Airborne LIDAR;DEM
    Date: 2009
    Issue Date: 2012-01-02 10:01:02 (UTC+8)
    Abstract: 地層下陷是台灣西南部地區一個很嚴重的問題，受地層持續下陷影響，每當颱風侵襲期間，持續性的大雨或豪雨之後常導致排水不良，造成相當嚴重的災情。因此，為求有效了解地層下陷量並進行地層下陷監控，已有傳統的精密水準測量，以及GPS 高程測量方法實際應用於地層下陷量的監測。然這兩種監測方式均需藉到現地觀測，且觀測資訊均屬點或線的分佈型態，除較無法獲取全面性的監測資料之外，所需要的時間成本也較多。因此，96 年度國科會永續會防災科技研究三年期整合型計劃在總計劃「多時序三維空間資訊於地層下陷監測及分析」之下，提出以空載光達測量技術，利用其能在短時間自動獲取大區域且具高精度高密度的特性進行地層下陷監測可行性的探討與評估，本計劃即為總計畫中的子計畫二。本計劃執行的第一年完成實驗區空載光達資料之掃瞄規劃與資料蒐集，且已建立以空載光達資料進行地層下陷量分析的模式。第二年則已經利用蒐集到的95 年空載光達資料與第一年計畫中所蒐集實驗區空載光達資料，進行第一年所發展以空載光達資料進行地層下陷量分析的模式探討與分析。接下來第三年的計畫除確立地層下陷空載光達掃描的作業方式和監測模式之外，並將比較光達DEM 資料與傳統航測DEM 資料之差異性，分析歷年來之地層下陷量。以目前蒐集的文獻分析，空載光達測量技術已可達到約5cm 高程精度，且可提供甚多之細節。本年度若以第一年和第三年所蒐集之空載光達資料證實所建置以空載光達資料進行地層下陷量分析模式的可行性，將來結合各個子計劃的研究成果將更有助於未來地層下陷監測工作之進行和後續地層下陷成因之分析。
    Land subsidence along the southwestern area in Taiwan is a serious problem. The continuous land subsidence leads to the poor drainage, causing serious flood during the heavy rainfall. Therefore, traditional precise leveling surveying and GPS height surveying techniques have been implemented for effective land subsidence monitoring. However, these two surveying techniques are time-consuming and not cost-effective because they need to collect the height data by setting up the instruments on site. In addition, those collected point-scattering or profile-scattering data cannot provide the global data for whole area to conduct comprehensive analysis and evaluation for land subsidence. Therefore, this study will evaluate and investigate the feasibility of airborne LIDAR data for land subsidence. Airborne LIDAR data is acquired by airborne LIDAR surveying technique. This whole new surveying technique can collect 3-D point clouds with high height accuracy and high point density in short time. By using the above-mentioned characteristics, airborne LIDAR data is highly potential to provide global data for land subsidence without time-consuming and with cost-effective. This study is one sub-project of three-year integrated research project, titled “Monitoring and Analyses for Land Subsidence Using Multi-temporal 3D Geoinformation”. In the first year, the plan for collecting airborne LIDAR data has been mapped out after the collected relevant references have been analyzed. More importantly, the model for land subsidence monitoring using airborne LIDAR surveying technique also has been decided. The developed model has been investigated using airborne data from two different periods in the second year. The land subsidence from the collected airborne LIDAR data in the first and last year will be compared and the differences of data generated from aerial photogrammetry and airborne LIDAR surveying technique will be analyzed in the last year. If the land subsidence monitoring by using airborne LIDAR data is feasible, the research results combined with other results of sub-projects in the integrated research project will be useful for future land subsidence monitoring and analysis.
    Relation: 應用研究
    學術補助
    研究期間:9808~ 9907
    研究經費:844仟元
    Source URI: http://grbsearch.stpi.narl.org.tw/GRB/result.jsp?id=1539778&plan_no=NSC98-2625-M004-001&plan_year=98&projkey=PB9807-1445&target=plan&highStr=*&check=0&pnchDesc=%E5%A4%9A%E6%99%82%E5%BA%8F%E4%B8%89%E7%B6%AD%E7%A9%BA%E9%96%93%E8%B3%87%E8%A8%8A%E6%96%BC%E5%9C%B0%E5%B1%A4%E4%B8%8B%E9%99%B7%E7%9B%A3%E6%B8%AC%E5%8F%8A%E5%88%86%E6%9E%90---%E5%AD%90%E8%A8%88%E7%95%AB%EF%BC%9A%E4%BB%A5%E7%A9%BA%E8%BC%89%E5%85%89%E9%81%94%E6%8A%80%E8%A1%93%E9%80%B2%E8%A1%8C%E5%9C%B0%E5%B1%A4%E4%B8%8B%E9%99%B7%E7%9B%A3%E6%B8%AC%E4%B9%8B%E7%A0%94%E7%A9%B6%28III%29
    Data Type: report
    Appears in Collections:[地政學系] 國科會研究計畫

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