03698nas a2200409 a 4500 20260818112714.0 230725s2023 th uu m rtt 0| a1eng d .b12409157 AIT Thesis no.GE-22-03 Jakrapun Khamboonruang Evaluation of debris flow occurrence at Khlong Narai waterfall, Chanthaburi, Thailand Pathum Thani, Thailand : Asian Institute of Technology, 2023 107 leaves : ill. Thesis ; no. GE-22-03 A thesis submitted in partial fulfillment of the requirements for the degree of Master of Engineering in Geotechnical and Earth Resources Engineering Thesis (M. Eng.) - Asian Institute of Technology, 2023 In landslide and debris flow research, many practices have been developed and applied to evaluate their characteristics and mechanisms for a better assessment. Geotechnical investigation is one of the valuable approaches that could contribute to a better understanding of debris flow behavior. Khlong Narai Debris Flow is a hazard that occurred in April 2017. This study area is located in Chanthaburi, Thailand. It is a granitic-related debris flow that was considered susceptible to landslides and debris flow according to various research. The field investigation and laboratory testing of the study area resulted in high-plasticity soil with low hydraulic conductivity. The application of slope stability analysis, empirical equations, and numerical simulation is involved in this study to estimate the thickness, volume, and behavior of debris flow. The thickness of possible failure derived from DEMs, and empirical equation based on slope gradient and elevation ranged between 0.25-20.76m., which resulted in an average failure volume of about 30,000 m3. The slope stability analysis could simulate the failure scar according to the boundary condition and parameters provided to the model. The results revealed that was not only precipitation causing the debris flow in this area, but there was a combination of another possible source of water from water pipe leakage (scope of the study). The characteristics and behavior of Khlong Narai Debris Flow were simulated using a 2D-runout model named RAMMS. The calibration gave appropriate Voellmy fluid-friction parameters for Dry-Coulomb friction ({uF06D}) and Viscous-turbulent friction (q) are 0.4 and 200 respectively with a yield stress value of about 100kPa. This sensitivity analysis allowed us to estimate the velocity of the flow at about 16.62m/s. Debris avalanches Thailand Chanthaburi Landslide hazard analysis Thailand Chanthaburi Chao, Kuo Chieh, Chairperson Avirut Puttiwongrak, Examination committee Krit Saowiang, Examination committee Royal Thai Government, Scholarship Donor Asian Institute of Technology Scholarships, Scholarship Donor Asian Institute of Technology. Thesis ; no. GE-22-03 Full-Text http://203.159.5.9/ait-thesis/detail.php?q=B19488 .b12409157 mnait m 250421 0 230725 m a m 0 mnarc mnarc 40 61 Barcode : 30050121040405 CREATED : 2023-07-21 RECORD # : i13456854 LPATRON : 0 LCHKIN : - # RENEWALS : 0 # OVERDUE : 0 IUSE3 : 0 TOT CHKOUT : 0 TOT RENEW : 0 Barcode : - CREATED : 2023-07-21 RECORD # : i13456866 LPATRON : 0 LCHKIN : - # RENEWALS : 0 # OVERDUE : 0 IUSE3 : 0 TOT CHKOUT : 0 TOT RENEW : 0 40904 40904 0 0 0 0 MAIN MAIN mnarc 2026-08-18 0 AIT Thesis no.GE-22-03 30050121040405 2026-08-18 11:27:14 1 2026-08-18 40 0 0 0 0 MAIN MAIN mnarc 2026-08-18 0 AIT Thesis no.GE-22-03 2026-08-18 11:27:14 2026-08-18 61