集水區水理模式應用於深層潛移山崩發生時序探討

The Use of a Hydrological Catchment Model to Determine the Occurrence of Temporal Creeping in Deep-seated Landslides

林聖恩(Sheng-En Lin) ； 詹雅馨(Ya-Hsin Chan) ； 郭志禹(Chih-Yu Kuo) ； 陳柔妃(Rou-Fei Chen) ； 許雅儒(Ya-Ju Hsu) ； 張國楨(Kuo-Jen Chang) ； 李心平(Shin-Ping Lee) ； 吳若穎(Ruo-Ying Wu) ； 林慶偉(Ching-Weei Lin)

《中華水土保持學報》 48卷4期 (2017/12) Pp. 153-162

https://doi.org/10.29417/JCSWC.201712_48(4).0001

摘要

傳統以來我們認為引發山崩的兩個主要因素為降雨強度和降雨量，因此大部分的山崩預警系統都使用降雨延時和強度來判斷，而往往忽略水滲入坡體的延時。在本研究中，我們藉由水筒模式中之蓄水指數(water storage index)歷線和即時地表位移之間的相關性，來說明蓄水指數與深層潛移山崩(deep-seated creeping landslide)的連動。以天池坡地區域2004年至2009年由GPS連續地表位移監測所記錄到的四個深層潛移山崩為例。結果顯示山崩位移與蓄水指數，比與降雨強度有更密切的時序發生相關性。

關鍵字

水筒模式 ； 全球衛星定位系統(GPS) ； 蓄水指數 ； 相關性函數

並列摘要

The amount and intensity of precipitation have long been considered to be two of the main factors that trigger landslides, so rainfall duration and intensity are used in virtually all landslide-warning systems. The effect of the infiltration of water and the increase in the pore water pressure in slopes are usually neglected in traditional approaches. This study demonstrates the effect of water storage content in a slope by using the correlation between the transient water storage index and the real time surface displacement. A tank model is used to model the water storage content and four deep-seated creeping landslides in the TienChih area, which recorded continuously using GPS, are studied as examples. The result demonstrates that the soil water index correlates more closely in time to the landslide motion than the rainfall intensity.

並列關鍵字

Tank model ； GPS ； WSI (water storage index) ； correlation function