본 연구는 전라북도지역에서 발생한 토석류 특성과 산림환경인자가 토석류에 미치는 영향을 분석하였다. 토석류 발생 수는 총 79개소였으며, 토석류 평균 발생면적은 3,383.2㎡, 평균 발생토사량은 5,879.7㎥, 평균 길이는 253.1m, 평균 폭 13.1m로 나타났다. 토석류가 비교적 많이 발생한 산림환경 인자는 사면 경사도(21~30° 이상), 북서사면, 해발(401m~500m 이하), 종단사면(오목), 횡단사면(오목), 침엽수, 화성암, 하천차수는(0차), 사면위치(산정), 임종(인공림), 수고(11~15m 이상), 흉고직경은 중경목(17cm 이상)에서 토석류 발생이 높은 것으로 조사되었다. 토석류 발생길이와 산림환경 인자와의 상관분석을 실시한 결과는 표고(501m 이상), 모암(화성암)에서 1% 수준 내에서 정의 상관관계를 보였고, 모암(퇴적암)에서 1% 수준 내에서 부의 상관관계를 보였다.
This study was carried out to analyze the characteristics of debris flows, and the effects of forest environmental factors on debris flow that occurred in Jeollabuk-do province in Korea. The total number of debris flows that occurred was 79; the average area of debris flow was 3,383.2 m2; the average sediment volume of debris flows was 5,879.7 m3; the average length of the debris flows was 253.1 m, and average width was 13.1 m. The debris flows highly occurred in areas having slope gradient(21~30°), slope gradient(NW), vertical slope(concave), cross slope (concave), altitude(401~500 m), forest type(coniferous), parent rock(Igneous), stream order(0 order), position (middle), forest type(artificial forest), tree height(11~15 m), and DBH(<17 cm), as well as in areas of igneous rocks. Correlation analysis between debris flow length with environmental factors showed that variables such as altitude(<500 m), parent rock(Igneous), had positive correlation with debris flow length and was statistically significant at 1% level, parent rock (Sedimentary), had negative correlation at 1% level.