本研究針對大漢溪流域之匹亞溪集水區實地量測土壤深度，建立土壤深度與坡度間的線性關係式，並以數值地形（DTM）計算坡度及推估全區之土壤深度分佈。利用艾利颱風誘發山崩資料，根據結合水文模式的無限邊坡理論搭配植生覆蓋指數（NDVI）對有效凝聚力的影響進行反算，獲得集水區內各地層的強度暨水文參數。反算過程是以高義雨量站的資料，讓研究區在災前常態下，大多為穩定，而在降雨引發崩塌的事件下，可能發生崩塌的地區與真正發生崩塌的位置大致相符。
研究中同時使用SHALSTAB和TRIGRS兩種模式進行降雨誘發淺層崩塌的模擬分析，再將模擬結果與實際崩塌資料進行比對，據以檢視這兩個模式的適用性。SHALSTAB和TRIGRS兩種模式的分析結果所得到的總體正確率分別為85.6%和87.2%，成功率曲線的曲線下面積（AUC）分別為0.811和 0.801。從總體正確率得知，TRIGRS 略高於SHALSTAB，而成功率曲的曲線下面積，SHALSTAB 略高於TRIGRS。總體而言兩個模式的分析結果大致相同，皆能有效解釋崩塌地分布，而具有模擬及預測之功能。本研究考慮了土壤深度、土壤凝聚力等參數的空間變異性，確能更有效地解釋山崩分布而可望獲得更佳的預測效果。

In this study, we measured soil depth in the Piya creek watershed of the Tahan River, and established the relationship between soil depth and slope angle. The functional relationship was used to estimate soil depth in the entire watershed with employing slope angles which are derived from a Digital Terrain Model (DTM). We used a hydrology model and an infinite slope model to perform back analysis for soil strength and hydrologic conductivity for each stratigraphic zone in the watershed from an event-based landslide inventory and the event rainfall data of typhoon Aere. In the back analysis, the effective cohesion of soil is assumed to be affected by roots and can be modeled by a function using Normalized Difference Vegetation Index (NDVI) as an independent variable. The ultimate result of the back analysis was satisfied by a criterion of maximum overall accuracy of interpreting landslides.
In the analysis, the SHALSTAB and the TRIGRS models were used for slope stability analysis, and the results were compared by carefully validations of predicting landslides. The overall accuracy of SHALSTAB and TRIGRS are 85.6% and 87.2%, respectively. The area under the curve of success rate curve of SHALSTAB and TRIGRS are 0.811 and 0.801, respectively. The performances of these two models are similar; both of them can predict the landslide distributions effectively. To consider the spatial variation of soil depth and effective cohesion in this study do help increasing the accuracy of predicting landslides.

王姵兮（2007）應用TRIGRS模式評估降雨及入滲誘發池上山棕寮地滑，國立中正大學應用地球物理研究所碩士論文，共108 頁。
朱聖心（2001）應用地理資訊系統製作地震及降雨所引致之山崩危險圖，國立臺灣大學土木工程研究所碩士論文，共169頁。
吳輝龍、陳文福、張維訓（2004）集水區地文特性因子與土石流發生機率間相關性之研究－以陳有蘭溪為例，中華水土保持學報，第35卷，第3期，第251-259頁。
李錫堤、潘國樑、林銘郎（2003）山崩調查與危險度評估-山崩潛感分析之研究（1/3），經濟部中央地質調查所報告，第92-11號，共154頁。
李錫堤、潘國樑、林銘郎（2004）山崩調查與危險度評估-山崩潛感分析之研究（2/3），經濟部中央地質調查所報告，第93-17號，共264頁。
李錫堤、潘國樑、林銘郎（2005）山崩調查與危險度評估-山崩潛感分析之研究（3/3），經濟部中央地質調查所報告，第94-18號，共268頁。
李馨慈（2004）應用累積位移法於地震引起之山崩潛勢分析，國立成功大學資源工程學系碩士論文，共103頁。
吳佳郡（2006）降雨誘發山崩之潛感分析初探，國立暨南大學土木工程學系碩士論文，共160 頁。
林書毅（1999）區域性山坡穩定評估方法探討－以林口台地為例，國立中央大學應用地質研究所碩士論文，共92頁。
林信亨、林美聆（2002）地理資訊系統及類神經網路應用於土石流危險溪流危險度判定，地工技術，90期，第73-84頁。
姜壽浩、徐美玲（2006）以局部穩定條件率定之邊坡土壤厚度估測模式，國立台灣大學地理學系地理學報，44：23-38。
張弼超（2005）運用羅吉斯迴歸法進行山崩潛感分析－以臺灣中部國姓地區為例，國立中央大學應用地質研究所碩士論文，共134 頁。
陳嬑璇（2002）溪頭地區山崩潛感圖製作研究，國立臺灣大學土木工程研究所碩士論文，共141頁。
陳本康（2005）石門水庫集水區崩塌特性及潛勢評估研究，國立中興大學水土保持學系博士論文，共193 頁。
經濟部中央地質調查所（2008）易淹水地區上游集水區地質調查與資料庫建置（第1階段96年度）－集水區地質調查及山崩土石流調查與發生潛勢評估計畫，經濟部中央地質調查所報告， 095-B-08-12-2-001-01-0，共667頁。
廖啟雯（2004）機率式地震誘發山崩危害度分析–以國姓地區為例，國立中央大學地球物理研究所博士論文，共120頁。
蔡呈奇（2002）應用地域分析與地理資訊系統繪製土壤圖：以台灣北部火山灰土壤為例，國立台灣大學農業化學研究所博士論文，共168頁。
鄭傑銘（2003）應用 GIS 進行豪雨及地震引致山崩之潛感性分析，國立台灣大學土木工程研究所碩士論文，共136頁。
Ahnert, F.（1970） Functional relationships between denudation, relief, and uplift in large mid-latitude drainage basine, American Journal of Science, 268, 243-263.
Beven, K.J., Kirkby, M.J.（1979） A physically-based, variable contributing area model of basin hydrology, Hydrological Sciences Billetin, 24, 43-69.
Burton, A., Arkell, T.J., Bathrust, J.C.（1998） Field variability of landslide model parameters, Env. Geol., 35, 100-114.
Baum, R. L., Savage, W. Z., Godt, J. W.（2002） TRIGRS – A Fortran program for transient rainfall infiltration and grid-based regional slope-stability analysis, U.S., Geological Survey, 61（Open-file Report 02-424）.
Baum, R.L., Coe, J.A., Godt, J.W., Harp, E.L., Reid, M.E., Savage, W.Z., Schulz, W.H., Brien, D.L., Chleborad, A.F., McKenna, J.P., Michael. J.A.,（2005） Regional landslide-hazard assessment for Seattle,Washington, USA. Landslides, 2, 266-279.
Carson, M.A., Kirkby, M.J.（1972） Hillslope Form and Process, Lodon Cambridge University Press.
Chung, C.F., Fabbri, A.G.. （1999） Probabilistic prediction models for landslide hazard mapping. Photogrammetric Engineering & Remote Seneing, 65, 1389-1399.
Chung, C.F., Fabbri, A.G.（2003） Validation of spatial prediction models for landslide hazard mapping. Natural Hazards, 30, 451-472.
Chen, C.Y., Chen, T.C., Yu, F.C., Lin, S.C.（2005） Analysis of time-varying rainfall infiltration induced landslide, Environmental Geology, 48, 466-479.
Dietrich, W.E., Montgomery, D.R.（1994） A Physically Based Model for The Topographic Control on Shallow Landsliding, Water Resources Research, 30, 1153-1171.
Dietrich, W.E., Hus, M.L., Montgomery, D.R.（1995） A process-based model for colluvial soil depth and shallow landsliding using digital elevation data, Hydrological Process, 9, 383-400.
Dietrich, W. E., Montgomery, D.R. （1998） SHALSTAB: A digital terrain model for mapping shallow landslide potential, http://socrates.berkeley.edu/~geomorph/shalstab/.
Delmonaco, G.., Leoni, G., Margottini, C., Puglisi, C., Spizzichino. D.（2003） Large scale debris-flow hazard assessment: a geotechnical approach and GIS modelling, Nat. Hazards Earth Syst. Sci., 3, 443–455
Guimara˜es, R.F., Montgomery, D.R., Greenberg, H.M., Fernandes, N.F., Gomes, R.A.T., Ju´nior, O.A.C.（2003） Parameterization of soil properties for a model of topographic controls on shallow landsliding: application to Rio de Janeiro, Engineering Geology, 69, 99-108.
Heimsath, A.M., Dirtrich, W.E, Nishiizumi, K., Finkel, R.C.（1997） The soil production function and landscape equilibrium, Nature, 388: 358-361.
Huang, J.C., Kao1, S.J., Hsu, M.L., Lin. J.C.,（2006） Stochastic procedure to extract and to integrate landslide susceptibility maps: an example of mountainous watershed in Taiwan, Nat. Hazards Earth Syst. Sci., 6, 803–815
Iverson, R.M.（2000） Landslide triggering by rain infiltration, Water Resources Research, 36, 1897-1910.
Jibson, R.W., Harp, E.L., Michael, J.A.（1998） A method for producing digital probabilistic seismic landslide hazard maps: an example from the Los Angeles, California Area, USGS Open-File Rep. 98-113.
Kirkby, M.J.（1971） Hillslope process-response models based on the continuity equation, Institute of British Geographers, Special Publication, 3, 15-30.
Khazai, B., and Sitar, N.（2000） Landslides in Native Ground: A GIS-Based Approach to Regional Seismic Stability Slope Stability Assessment, http://www2.ced.berkeley.edu:8002/index2.html.
Luzi, L., Pergalani, F., Terlien, M.T.J.（2000） Slope vulnerability to earthquakes at subregional scale, using probabilistic techniques and geographic information systems, Engineering Geology, 58, 313-336.
Lillesand, T.M., Kiefer, R.W.（2000） Remote sensing and image interpretation, Wiley & Sons, New York, 724p.
Montgomery, D.R., Sullivan, K., Greenbery, H.M.（1998） Reginal Test of A Model for Shallow Landsliding, Hydrological Processes 12, 943-955.
O’ loughlin E.M.（1986） Prediction of Surface Saturation Zone in Watural Catchments by Topographic Analysis, Water Resources Research 22, 794-804.
Pack, R.T., Tarboton, D.G., Goodwin, C.N.（1998） The SINMAP Approach to Terrain Stability Mapping. Congress of the International Association of Engineering Geology, Vancouver, British Columbia, Canada, 21-25 September 1998.
Pack, R.T., Tarboton, D.G., Goodwin, C.N.（2001） Assessing Terrain Stability in a GIS using SINMAP, in 15th annual GIS conference, GIS 2001, Vancouver, British Columbia, February 19-22.
Sidle, R.C.（1992） A theoretical model of the effects of timber harvesting on slope stability, Water Resources Research, 28, 1897-1910.
Salciarini, D., Godt, J.W., Savage, W.Z., Conversini, P., Baum, R.L., Michael, J.A.（2006） Modeling regional initiation of rainfall-induced shallow landslides in the eastern Umbria Region of central Italy. Landslides, 3, 181-194.
Zhou, G.., Esaki, T., Mitani, Y., Xie, M., Mori, J.（2003） Spatial probabilistic modeling of slope failure using integrated GIS Monte Carlo simulation approach, Engineering Geology, 68, 373-386.