National Changhua University of Education Institutional Repository : Item 987654321/19628
English  |  正體中文  |  简体中文  |  Items with full text/Total items : 6498/11670
Visitors : 26015854      Online Users : 62
RC Version 3.2 © Powered By DSPACE, MIT. Enhanced by NTU Library IR team.
Scope Adv. Search

Please use this identifier to cite or link to this item:

Title: Magnitude-Frequency Distribution of Rainfall-Triggered Landslide Erosion in Kaoping River Watershed, Southern Taiwan
Authors: Chen, Yi-Chin;Chiu, Yu-Jia;Lee, Hong-Yuan
Contributors: 地理學系
Keywords: Temporal frequency;Magnitude;Landslide erosion rate;Extreme rainfall;Taiwan
Date: 2012
Issue Date: 2015-04-29T04:10:24Z
Abstract: Magnitude-frequency of landslide erosion is a critical component to investigate the long-term erosion rate, landscape evolution, and natural hazard in tropical and mountainous area. In this study, the relationship between magnitude and temporal frequency for rainfall-triggered landslide erosion was been quantified in the Kaoping River watershed, southern Taiwan. The magnitude of landslide erosion was estimated by using multi-temporal landslide inventory with volume-area relations. The long-term frequency of landslide was derived from the record of 244 storms in 53 years and using hydrological frequency analysis by 6 types of probability distribution function. Then, we utilized the concept of an expectation of landslide erosion (EXLE) to explore the contributions of different rainfall intensity and to analysis the landslide erosion rate. The results show that the magnitude-frequency distributions show negative and piecewise power-law functions and the EXLE increase over the rainfall intensity. This reveals that landslide erosion triggered by intensive-extreme rainfall is more important than it triggered by moderate-frequent rainfall. Then, the landslide erosion rate is estimated to be 2.99 - 5.27 mm yr-1 in which rainfall with return period >= 10 years contributes 56-75% of total landslide erosion in the Kaoping River watershed. Analyzing the magnitude-frequency distribution is a reliable method that can quantify the contribution of landslide by different rainfall intensity and can avoid the uncertainty resulting from extreme event in estimation of landslide erosion rate.
Relation: ICEO-SI 2012 Conference
Appears in Collections:[Department of Geography] Proceedings

Files in This Item:

File SizeFormat
2040401516006.pdf8KbAdobe PDF224View/Open

All items in NCUEIR are protected by copyright, with all rights reserved.


DSpace Software Copyright © 2002-2004  MIT &  Hewlett-Packard  /   Enhanced by   NTU Library IR team Copyright ©   - Feedback