https://scholars.lib.ntu.edu.tw/handle/123456789/571766
標題: | Quantification of mudcracks-driven erosion using terrestrial laser scanning in laboratory runoff experiment | 作者: | CI-JIAN YANG Jen C.-H Cheng Y.-C Lin J.-C. JIUN CHUAN LIN |
關鍵字: | digital elevation model; erosion; experimental study; flume experiment; rill; runoff; spatiotemporal analysis | 公開日期: | 2021 | 卷: | 375 | 來源出版物: | Geomorphology | 摘要: | Understanding rill development and erosion rates is crucial for understanding changes in hillslope morphology and soil erosion. Mudcracks, a widely distributed feature on the land surface, play an important role in erosion, but the quantitative relationship between mudcracks and erosion has seldom been reported. Thanks to advances in terrestrial laser scanning (TLS, also known as terrestrial LiDAR), topographic changes can be observed at high resolution. This study is designed to quantify the effects of mudcracks on erosion. Mudstone specimens with and without mudcracks were analyzed. Using TLS, we quantified the millimeter-scale effects of mudcracks on slope erosion and rill development in laboratory experiments with well-controlled samples and water discharge. The point cloud data collected by TLS were then converted to digital elevation models (DEMs) for DEM of difference (DoD) analysis. The results show that mudcracks facilitate rill development. In the early stage of the experiment, the erosion depth of the cracked mudstone is twice that of the surface without cracks, and the total erosion amount is more than twice. During the experiments, the dominant erosion pattern changes from sheet erosion to rill erosion and then lateral erosion. Moreover, our study highlights the potential of TLS and DoD for high-resolution spatio-temporal topographic surveys to identify and characterize micro-relief-induced erosion. ? 2020 Elsevier B.V. |
URI: | https://www.scopus.com/inward/record.uri?eid=2-s2.0-85097408222&doi=10.1016%2fj.geomorph.2020.107527&partnerID=40&md5=bf263e55273af48dc8142d2076f0c336 https://scholars.lib.ntu.edu.tw/handle/123456789/571766 |
ISSN: | 0169555X | DOI: | 10.1016/j.geomorph.2020.107527 |
顯示於: | 地理環境資源學系 |
在 IR 系統中的文件,除了特別指名其著作權條款之外,均受到著作權保護,並且保留所有的權利。