The Influence of Landslide on Sediment Transportation of River Bed

• Main Authors: Cian-PlHuang, 黃千輔
• Other Authors: Jeng-Luen Shie
• Format: Others
• Language: zh-TW
• Published: 2012
• Online Access: http://ndltd.ncl.edu.tw/handle/74406460261568507245

碩士 === 國立成功大學 === 水利及海洋工程學系碩博士班 === 100 === In Taiwan, the frequent earthquake and typhoon each year are the causes for landslides in mountain area. In this study, an laboratory experimental was set to simulate the effects and changes during and after landslide event.there are two grain sizes setting of river bed, homogeneous and non- homogeneous, to consider the river bed condition when landslide occurred and following event. Result of homogeneous case: The concentration of the fine sediment affects the sediment transport rate. At steep slope, lower fine sediment could maximize sediment transport rate. At mild slope, the debris flow would occur with enough fine sediment, Result of non-homogeneous case, the increasing of fine sediment could enhance the capability of sediment transport. Therefore, with the increasing of slope of river bed, the the raisen of the sediment transport rate is getting higher. In conclusion, the concentration of fine sediment could affect properties of sediment transport. Of this experiment it is discussed about the temporal effects of sediment transports of the river bed when landslide occurred and afterward.