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冠岳樹木圓地域內 荒廢山地土壤의 肥沃化를 통한 綠化促進에 關한 硏究(II)
禹保命,權台鎬,李宗學,金景河,李峻雨,麻鎬燮 서울大學校 農科大學 1986 서울대농학연구지 Vol.11 No.2
The shallow soil depth and severe rock exposures on the hillslopes in the Kwanak aboretum area which resulted from the heavy soil erosion have made very poor growth of forest vegetation. In order to establish the forest vegetation in this area, it is urgent to recover the fertility of soil and the productivity of existing trees. For this reason, fertilization experiment (using the briquet compound fertilizer) was conducted on summer and autumn season in 1983 with the 4 main native species (Pinus densiflora, Pinus rigida, Juniperus rigida, Rhododendron schlippenbachii) growing on these eroded hillslopes. Result in 1985 and 1986 of this experiment represented that the fertilization was effective toward both height and root-collar diameter growth of trees and spring fertilization was, relatively, more effective than autumn fertilization. It also represented that effects of fertilization to P. rigida were more than those to other species. Therefore, besides the engineering methods and afforestation measures for soil erosion control, rapid establishment of vegetation through conservation and recovery of existing trees by fertilization is available measures for the rehabilitation of rockily eroded hillslopes like Mt. Kwanak area.
우용태,엄종훈 國立 昌原大學校 基礎科學硏究所 1993 基礎科學硏究所論文集 Vol.4 No.-
In this paper, given a simple polygon and a simple chain ch(??,??), the notion of chain visibility polygon of a simple polygon P is introduced, and a optimal algorithm for finding the chain visibility polygon in a simple polygon is presented. In the preprocessing step, the simple polygon is triangulated, and computed shortest paths from ?? and ?? to all other vertices in linear time. Then, Condensed dual tree composed of triangles of triangulation is traversed and visible areas from the chain is computed and merged in linear time.
우용태,이종남,허위행 慶星大學校 1998 論文集 Vol.19 No.2
1. This is a part of the second nation-wide survey of natural environment by the Ministry of Environment of Korea in 1997 and the Mammalia were surveyed in the area of Daegu and Dalsung. 2. The survey area was divided into 6 parts and the survey was carried out by the visiting and inquiry method. 3. The Mammalia surveyed were classified into 6 orders, 12 familiesm and 27 species. 4. A total of 27 species surveyed by this survey was only 35.5% of 76 species of Mammalia (except CETACEA and PINNIPEDIA) inhabited in Korea. 5. Among the 27 species, 17 species were surveyed at all the 6 parts, 3 species were natural monuments, and 7 species were rare and endangered species. 6. The result showed that several species decreased because of the destroy of habitat by the deforestation and illegal capture.
우용태,이종남 慶星大學校 1996 論文集 Vol.17 No.4
The fauna of terrestrial vertebrate in the Mt. Hwang-Ryung were surveyed monthly from April, 1955 to March, 1966. The results obtained were as follows. 1. Aves ① A total of 1,415 individuals were recorded and which were classified into 50 species, 23 families and 8 orders. ② In the comparison of appearance number of species and individuals in each month, the largest number and the smallest number of species were recorded in may and in August, respectively. On the other hand, the largest number and the smallest number of individuals were recorded in october and in july, respectively. ③ In the monthly survey, 11 species were recorded 100% and 17 species were recorded above 50%. In the appearance ratio of individuals, only 2 species of Vinous-throated parrotbill(Paradoxonis webbiana) and Siskin (Carduelis spinus_ were recorded above 10%, and 14 species were recorded above 2%. The others were recorded below 2%. ④ The species which showed dominance index above 10 were only Vinous-throated parrotbill. All the species except Siskin belonging to the upper 17 ranks of the dominance index were residents. ⑤ Of the total 50 species, 24 species (48%) were residents, 17 species (34%) were summer visitors, 7 species (14%) were winter visitors, and 2 species (4%) were passage migrants respectively. And of the total 1,451 individuals, 1,106 individuals (76.2%) were residents, 271 individuals (18.7%) were winter visitors, 69 individuals (4.8%) were summer visitors and 5 individuals (0.3%) were passage migrants, respectively. 2. Mammalil 12 species, 8 families and 6 orders were recorded in the survey. These 12 species consisted of each 1 species of family Talpidae, Soricidae, Vespertilionidae, Leporidae, Sciuridae, Mustelidae, and Cervidae and 5 species of family Muridae. 3. Reptilia and Amphibia ① 7 species, 4 families, 2 suborders, 1 order of Reptilias were recorded in the survey. These 7 species were Gekko yaponicus, Takydromus wolteri, Dinodon rufozonatum, Natrix tigrina, Elaphe rufodorcata, Elaphe dine and Agkistrodon caliginosus. ② Amphibians observed were classified into 2 orders, 5 families and 6 species. These 6 species were Hynobius leechii, Bombiana orientalis, Bufo bufo, Hyla arborea, Rana nigromaculata and Rana temporaria.
우종태,양태선 경복대학 1998 京福論叢 Vol.2 No.-
본 연구에서는 국내 최초로 시공한 한강 하저터널의 연약대 구간의 현장계측 및 수치해석결과를 비교 분석한 것으로 정밀지반조사 결과를 토대로 재해석을 실시하고, 그 결과를 터널 시공시 측정한 현장계측치와 비교한 후 다시 역해석을 실시하여 굴착에 따른 변위량을 확인한 것으로 연구결과를 요약하면 다음과 같다. 1. 현장계측치의 내공변위량과 천단침하량이 재해석시의 값과 상당한 차이를 보이는 것은 상행선 터널은 암반, 하행선 터널은 실트를 포함한 모래층으로 재해석시의 지반조건과 많은 차이가 있는 것으로 판단된다. 2. 역해석 결과 링커트 방식으로 굴착함으로써 지반 교란 효과가 감소한 것을 알 수 있으며, 내공변위량이 천단침하량에 비해 상대적으로 2.3~2.7배 크게 발생하므로 현장계측치와 유사한 결과를 얻었다. On this study, it is tried to perform a comparative analyses of field monitoring and numerical values in the geologically soft layer of tunnel underpassing the Han River. On the basis of soil investigation, reanalysis is done and feed back analysis is taken after comparing its results with field measured values. So, the excavation settlement is confirmed The summaries of this study are as follows; 1. A remarkable difference of settlements in the crown and convergence between field and reanalysis numerical values results from the geological conditions which is consisted of rock and silty sand, respectively, in the Uppe line and Lower line. 2. In the results of feed back analysis, the excavation method by ring cut deserves reducing geological disturbance and getting the approximate results to field values which convergence settlement is 2.3~2.7 times the crown one.
우용태,이종남,허위행 慶星大學校 1998 論文集 Vol.19 No.2
1. This is a part of the second nation-side survey of natural environment by the Ministry of Environment of Korea in 1997 and the Amphibians and Reptiles were surveyed in the area of Daegu and Dalsung. 2. The survey area was divided into 6 parts and the survey was carried out by the visiting and inquiry method. 3. The Amphibians surveyed were calssified into 2 orders, 6 families and 9 species, and Reptiles were classified into 2 orders, 6 families and 14 species, respectively. 4. Among the 23 species, 16 species, were surveyed at all the 6 parts. And among the surveyed species, 10 were rare or endangered species. 5. The result showed that several species decreased because of the destroy of habitat by the deforestation, overcatching for the materials of Korean medicine, and especially the prey by introduced foreign species-Rana catesbiana. 6. Elaphe schrenckii distributed in some areas and Gekko japonicus, having been reported extinct after 1920, distributed in Mt. Pi-suhl, Chung-ryong, and Choi-jung.