지형지표를 활용한 조구조활성도 평가방법 및 활용성

Abstract

Geomorphic indices have been used to assess relative tectonic activity, quantify surface relief and identify geomorphic anomalies caused by blind fault and/or fold. These indices, especially related with drainage system and mountain front, can be easily recognized through aerial photo as well as high-resolution DEM. The tectonic activity even over large area is easily interpreted based on geomorphic indices in a relatively short time. Despite of these advantages there are several limitations to be considered: 1) Because this method is based on Davis’s cycle of normal erosion, effects of other factors such as rock type, climate change and anthropogenic influences are often ignored; 2) It has not been reviewed sufficiently whether it can be applied in areas with low tectonic rate such as intra-plate region or not. If the aforementioned constraints are resolved and the applicability in areas with low slip rate is confirmed, this morphometric approach can be applicable to Korean peninsula. Furthermore the results can be used to trace surface ruptures and fault segmentation along with the various data such as geophysical and geodesic data. Through the follow-up studies, we will evaluate the southeastern part of Korean peninsula where major seismogenic structures are developed.