| Title |
Numerical Modeling for the Detection of Debris Flow Using Detailed Soil Map and GIS |
| Authors |
김판구(Kim, Pan Gu) ; 한건연(Han, Kun Yeun) |
| DOI |
https://doi.org/10.12652/Ksce.2017.37.1.0043 |
| Keywords |
SINMAP 모형;토석류;정밀토양도;토질정수 SINMAP model;Debris flow;Detailed soil map;Soil strength parameter |
| Abstract |
This study presents the prediction methodology of debris flow occurrence areas using the SINMAP model. Former studies used a single calibration region applying some of the soil test results to predict debris flow occurrence in SINMAP model, which couldn't subdivide the soil properties for the target areas. On the other hands, a multi-calibration region using a detailed soil map and soil strength parameters (c, ${\phi}$) for each soil series to make up for limitation of former studies is proposed. In this process, soils with soil erodibility factor (K) are classified into three types: 1) gravel and gravelly soil. 2) sand and sandy soil, and 3) silt and clay. In addition, T/R estimation method using mean elevation of target area instead of T/R method using actual occurrence time is suggested in this study. The suggested method is applied to Seobyeok-1 ri area, Bonghwa-gun where debris flow occurred. As a result of comparison between two T/R estimation method, both T/R estimations are almost equal. Therefore, the suggested methodologies in this study will contribute to set up the national-wide mitigation plan against debris flow occurrence. |