• 화약ㆍ발파
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• 제38권4호
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• pp.37-45
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• 2020

토도는 부산신항 앞바다에 위치한 무인도였다. 이 섬은 해발 32 m 높이의 작은 섬으로서 물속에 잠긴 부분을 포함한 총면적은 24,400 이었다. 그런데 불행하게도 이 섬은 부산신항의 북 컨테이너 부두와 남 컨테이너 부두로 들어가는 좁은 입구에 위치해 부두를 드나드는 수많은 선박들이 섬을 피해 운항하느라 급선회하면서 다른 선박이나 크레인과 자주 충돌하는 사고의 원인이 되어 왔다. 이와 같은 위험을 없애고, 해로를 더 넓고 깊게 만들기 위하여 해양수산부 당국은 토도를 제거하기로 결정하였다. 토도가 제거되면 부산신항 입구를 운항하는 대형 선박들의 안전이 확보될 것이고, 이는 부산신항의 경쟁력을 한층 높일 것으로 기대되었다. 이 논문에서는 토도 제거의 전체 과정을 상세하게 소개한다. 토도 제거작업은 국내 최초로 벌크 에멀젼 폭약과 비전기뇌관을 적용하여 성공적으로 수중발파를 완수한 최초의 사례이기도 하다.

• Journal of Plant Biology
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• 제13권1호
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• pp.13-24
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• 1970

This investigation was one of the series of ecological studies on the plant communities of Quelpart Island which was held in 1969. It was aimed at studying the ground vegetation of Torreya nucifera and the soil properties of the ground in which it grows. Observaton of the flora in a place where wild growth of Crinum maritimum, soil properties and distribution of micro-organisms in a place where wild growth occurs, were also made. 1) A few kinds which have important values among the ground vegetation fo Torreya nucifera forest are Liniope graminifolia, Convallaria keiskei, Sasaquelpaertensis, Carex kingiana, Pteridium aquilinum, Pyrola japonica, Hedera tobleri, etc. 2) While the studies of 25 Quadrats were being held, 29 species in A plot, 30 species in B plot, and 26 species in C plot have been found. 3) The kind which has the highest important value among the species located in naked plot(outside of Torreya nucifera forest) is Zoysia japonica and 18 other kinds were found. 4) The soil fertility through all depths are found higher in the forest soil than in that of open places. 5) P2O5, K, and total exchangeable bases etc. have shown the difference of contents according to the depth and generally had lower value as much as it goes down. 6) The content of N was a lot higher than any other forest soil and P2O5, K and total exchangeable bases seemed to be a little lower. 7) The overall flora of Todo consists of 71 species (9 species of wood plant and 62 species of herbs) added 28 kinds of non-reported species. 8) Themineral contents are the highest at a place of wind growth of Crinum maritimum which has much organic matter. The subsoil of this place is more fertile than surface soil. 9) The soil of Todo which is sandy soil, consists of shellfish shell and quartz, and has low fertility and alkali. 10) In the total occurrences of micro-organisms, bacteria was the greatest in number followed by actinomycete and fungi, in that order. 11) A survey of the soil depth and the ecological distributional pattern of micro-organismsm revealed that the number of micro-organisms is the greatest on the surface, gradually decreasing in proportion to the depth. 12) It was found that a comparatively greater number of micro-organisms occurred when the soil showed an adequate increase in water content.