Ecological Agriculture: Ecological Monitoring and Rehabilitation of Agriculture Landscapes【Department of Soil Water Conservation / Chen, Su-Chin / Distinguished Professor】
生態農業：農業地景生態監測及復育【水土保持學系/陳樹群特聘教授】
論文篇名 On Dam Failure induced Seismic Signals Using Laboratory Tests and on Breach Morphology due to Overtopping by Modeling
期刊名稱 WATER
發表年份,卷數,起迄頁數 2021,13(19), 2757
作者 Hung, Chi-Yao; Tseng, I-Fan; Chen, Su-Chin(陳樹群); Feng, Zheng-Yi*
DOI 10.3390/w13192757
中文摘要 在室內水槽中構建潰壩模型，以測試壩體破壞過程，並研究誘發的地震信號。本研究還提出了一個簡單的潰壩模型來估計潰壩洪水的水文過程線。試驗結果表明，當壩滲流引起的溯源侵蝕繼續進行時，最終會到達壩上游側的壩頂，進而引發溢流和潰壩。評估了壩模型在溯源侵蝕和沖頂過程中與破壞事件相對應的地震信號。通過希爾伯特-黃變換分析地震信號的特徵。根據地震信號的特點，我們發現了溯源侵蝕過程中的四種類型的質量運動，即單一的、間歇的和連續的滑動和下降。在大壩滑動事件之前就發現了由裂縫引起的前兆地震信號。此外，潰壩建模結果與試驗結果和現場觀測結果吻合良好。從試驗和建模結果來看，我們證實了壩的越頂流量和側向滑動量也是影響潰口演化的重要因素之一。此外，裂縫的擴大率隨著排放量的減少而降低。所提出的潰壩模型可以成為潰壩預警和減災的有用工具。
英文摘要 Dam models were constructed in an indoor flume to test dam breach failure processes to study the seismic signals induced. A simple dam breach model was also proposed to estimate hydrographs for dam breach floods. The test results showed that when the retrogressive erosion due to seepage of the dam continues, it will eventually reach the crest at the upstream side of the dam, and then trigger overtopping and breaching. The seismic signals corresponding to the failure events during retrogressive erosion and overtopping of the dam models were evaluated. Characteristics of the seismic signals were analyzed by Hilbert–Huang transform. Based on the characteristics of the seismic signals, we found four types of mass movement during the retrogressive erosion process, i.e., the single, intermittent, and successive slides and fall. There were precursor seismic signals found caused by cracking immediately before the sliding events of the dam. Furthermore, the dam breach modeling results coincided well with the test results and the field observations. From the test and modeling results, we confirmed that the overtopping discharge and the lateral sliding masses of the dam are also among the important factors influencing the evolution of the breach. In addition, the widening rate of the breach decreases with decreased discharge. The proposed dam breach model can be a useful tool for dam breach warning and hazard reduction.
發表成果與本中心研究主題相關性 室內潰壩實驗與理論分析，了解潰壩水流的影響性。