| Summary: | 碩士 === 國立成功大學 === 地球科學系專班 === 96 === Nine locations in ChiaYee County, Tainan County and Kaoshiung County were selected for mass wasting study. The study includes the field geological surveys such as rock type, attitude of slope and discontinuity (including strata), density of discontinuity; and interpretation of air photography, geology map, morphology map and satellite image. Four indices: ISS ( index of slanting of the slope), IDS( index of down sloping) IV (index of volume of mass wasting by down sloping) and IVDS (index of dangerous mass wasting by down sloping) are calculated to evaluate the mass wasting potential for rocK slope. 5 outcrops are syn-slant slopes, 6 outcrops are anti slant slopes; 3 outcrops are slumped debris. The rocK sliding is the major pattern of mass wasting in syn-slant slopes, while debris fall or rock fall is the major pattern of mass wasting in anti-slant slope. Undercutting by meander is the initiating cause of mass wasting in 4 localities. The mass wasting potential is high in nine localities.
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