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박재현,우보명,김우룡,안현철,조현서,추갑철,김춘식,최형태,Park, Jae-Hyeon,Woo, Bo-Myeong,Kim, Oue-Ryong,Ahn, Hyun-Chul,Cho, Hyun-Seo,Choo, Gab-Chul,Kim, Choon-Sig,Choi, Hyung-Tae 한국환경복원기술학회 2001 한국환경복원기술학회지 Vol.4 No.3
This study was conducted to investigate physicochemical property changes from July 1998 to August 2001 in Mt. Bukhansan National Park. Four water sampling points were selected to measure the quality of stream water in the northeastern part of the Mt. Bukhansan National Park. The results were summarized as follows; In spring, the average pH of stream water was below the first class of the river water quality standard, while it was normal level in summer. The average electrical conductivity was about 2.3~3.3 times higher in downstream water than in upstream water during spring and summer. The contents of anions($Cl^-$, $NO{_3}^-$, $SO{_4}^{2-}$) were about 1.1~7.4 and 0.4~11.4 times higher in downstream than in upstream water, respectively. These results indicate that water quality was poorer in downstream than in upstream water. We suggest that stream water in the Mt. Bukhansan National Park should be protected from impacts of snow melting mineral particles in spring season and human impacts like wastewater of point source in summer season.
휴석동 땅밀림형 산사태의 발생특성에 관한 연구 (Ⅱ) - 지형 및 수문특성 -
우보명(Bo Myeong Woo),임재현(Jae Hyeon Park),최형태(Hyung Tae Choi),전기성(Gi Seong Jeon),김경훈(Kyung Hoon Kim) 한국산림과학회 1996 한국산림과학회지 Vol.85 No.4
The geological and hydrological survey was carried out in Hyuseok-dong landslide area(10/㏊), Youngchoon-myeon, Danyang-gun, Choongcheongbuk-do. The results showed that the bed rocks in this area consisted of shale, sandstone and limestone, and the piles of stones debris were also scattered around the hill above the study area. Soil texture was sandy loam, and bulk density of the soil in the lower part of the area was higher than that of the upper part, but void ratio of the soil in the lower part was lower than that of the upper part . Subsurface water was springing out to the surface in many places in this area. In this area, the storms over 70㎜/day were frequent during the summer period from June through September. It was concluded that the occurrence of landslide had a close relationship with the geological characteristics, hydrological conditions and the rainfall distribution.
휴석동(休石洞) 땅밀림형(型) 산사태(山沙汰)의 발생특성(發生特性)에 관한 연구(硏究)(II) -지질(地質) 및 수문특성(水文特性)-
우보명,박재현,최형태,전기성,김경훈,Woo, Bo-Myeong,Park, Jae-Hyeon,Choi, Hyung-Tae,Jeon, Gi-Seong,Kim, Kyung-Hoon 한국산림과학회 1996 한국산림과학회지 Vol.85 No.4
충청북도(忠淸北道) 단양군(丹陽郡) 영춘면(永春面) 상리(上里) 휴석동(休石洞) 땅밀림형 산사태지(山沙汰地)의 지질특성(地質特性) 및 수문상황(水文狀況)을 조사 분석한 결과, 연구대상지의 토질(土質)은 고결도(固結度)가 낮고, 투수성이 높은 혈암(頁岩), 사암(砂岩), 석회암(石灰岩) 등이 혼재한 사력층(砂礫層)으로 구성되고 대규모 돌너덜지대가 여러 곳에 분포하고 있었으며, 지표토양은 하부로 갈수록 토양(土壤) 용적밀도(容積密度)가 증가하고, 공극비(孔隙比)가 감소하는 경향을 보여 땅밀림형 산사태(山沙汰) 발생에 의한 지표토양(地表土壤)의 압축현상(壓軸現象)이 나타난 것으로 해석되었다. 또한, 지표(地表)에는 투수성이 높은 토양구조상(土壤構造上)의 특성(균열(龜裂) 및 함몰현상(陷沒現象) 발생 등)으로 인하여 강우수(降雨水)의 대부분이 지중(地中)으로 침투(浸透)하여 지표류거수량(地表流去水量)이 적고, 하단부 포락(浦落)벼랑에서 용출수(湧出水) 지점(地點)이 다수(多數) 확인되었다. 한편, 연구대상지에서는 산사태(山沙汰) 토괴(土塊)의 급속한 운동(運動)을 초래하는 70mm/day 이상의 강우강도를 가진 집중호우(集中豪雨)의 발생이 많음으로 인해, 이러한 집중호우가 산사태(山沙汰)를 발생시킨 주요 원인중 하나인 것으로 판단되었다. 이상의 결과를 종합해 볼 때, 휴석동 땅밀림형 산사태지(山沙汰地)는 지질(地質) 및 수문적(水文的) 상황(狀況)과 기상요인(氣象要因) 등의 여러 인자(因子)들이 상호 밀접하게 관련(關聯)되어 발생됨을 알 수 있었으며, 향후(向後) 이러한 관련인자(關聯因子)들에 대한 정밀한 조사(調査)와 연구(硏究)가 지속적으로 수행되어져야 할 것이다. The geological and hydrological survey was carried out in Hyuseok-dong landslide area(10 ha), Youngchoon-myeon, Danyang-gun, Choongcheongbuk-do. The results showed that the bed rocks in this area consisted of shale, sandstone and limestone, and the piles of stones debris were also scattered around the hill above the study area. Soil texture was sandy loam, and bulk density of the soil in the lower part of the area was higher than that of the upper part, but void ratio of the soil in the lower part was lower than that of the upper part. Subsurface water was springing out to the surface in many places in this area. In this area, the storms over 70mm/day were frequent during the summer period from June through September. It was concluded that the occurrence of landslide had a close relationship with the geological characteristics, hydrological conditions and the rainfall distribution.
성숙임목벌채지에서 (成熟林木伐採地) 항우수의 (降雨水) 표면유출량과 산지침식에 (山地浸蝕) 미치는 환경요인의 영향
우보명(Bo Myeong Woo),박재현(Jae Hyeon Park),전기성(Gi Seong Jeon),정도현(Do Hyun Jeong) 한국산림과학회 1995 한국산림과학회지 Vol.84 No.2
This research was conducted to investigate the influential factors of the runoff of water and hillslope erosion caused by the large - scale harvesting operation. It was carried out on harvested sites (13㏊) and non - harvested sites(13㏊) in Seoul National University Research Forest [(Mt.) Paekunsan] , from 1993 to 1994. 1. The amount of runoff of water was increased as the unit of rainfall increases, and the amount of runoff on harvested sites was larger than that of non - harvested sites by 28% in the first year and 24.5% in the second year after harvesting. According to the multiple regression equation for surface runoff, unit and number of rainfall, amount of hillslope erosion and soil bulk density showed statistically significance(R²=0.91). 2. The amount of hillslope erosion on harvested sites was larger than that of non - harvested sites by 7 times during the first year of harvesting and 2 times during the second year. 3. The multiple regression equations for hillslope erosion showed that soil bulk density, surface runoff of water and unit of rainfall(these factors were not controllable) had statistically significance(R²=0.74). 4. Soil runoff in harvested and non harvested sites were maximum 6.7% and 1% of the amount of hillslope erosion, respectively during the first year of harvesting. And the second year of harvesting soil runoff in harvested and non harvested cites were maximum 5.7% and 1.9%of the amount of hillslope erosion. From the above results, when in planning for timber harvesting, the buffer strip - woods zone must be remained to diminish soil and water runoff and to preserve water quality.
벌채적지 (伐採跡地) 운재로의 (運材路) 토양가밀도 변화와 자연식생회복에 관한 연구
우보명,박재현,김경훈 ( Bo Myeong Woo,Jae Hyeon Park,Kyung Hoon Kim ) 한국산림과학회 1994 한국산림과학회지 Vol.83 No.4
The objective of the study was to provide the useful scientific data m the early rehabilitation of the legging road after timber harvesting in the forest area. This study teas carried out at logging roads which were constructed daring 1989 and 1994 in Mt. Baekwoon. The field survey was conducted in July. 1991. Judging from the analysis of soil bulk density, time required for recovery as the undisturbed forest soil condition was more than 10 years in the road which was left, and the regression equation is as follows, Y₁=1.4195-0.0744·X(R²=0.91) Y₂=1.4673-0.0688·X(R²=0.73) (X : elapsed year after road construction. Y₁,Y₂: soil bulk density(g/㎤) at 0∼7.5㎝, and 9.5∼15.0㎝, respectively) Especially soil bulk density with buffer strip-woods was 0.890-0.903g/㎤, so it was 20% lower than that of logging road surface without buffer strip-woods Among the 7 factors, location, sand content, and soil hardness had statistically significant effect on the soil bulk density in logging road surface The pioneer species on logging road surface were Rhus cratargifolius, Prunus chinensis, and Lespedeza cytobotrya, etc. in wood.s species, and Pteridium aquilinum. Arundinella hirta, and Lysimachia clethroides, etc. in herb species. So, in process of year, average plant coverage were 70% on cutting and banking slope and 20% on logging road surface which elapsed 6 years after logging road construction. Through this research buffer strip-woods must be remained for environmental conservation of forest conditions, and from the tune to be closed the road, planting, seeding, and grazing works could be effective to the soil condition and vegetation recovery.
일본(日本)에서 한류변(漢流邊)의 환경부원(環境復元) 발전전략(發展戰略)(I)
박재현,우보명,이헌호,Park, Jae-Hyeon,Woo, Bo-Myeong,Lee, Heon-Ho 한국환경복원기술학회 2000 한국환경복원기술학회지 Vol.3 No.1
This study was carried out to introduce current status and development strategy for an environmental restoration of stream side in Japan, and to consider a methodology which could be effectively applied for the environmental restoration of stream side in Korea. Since the end of 20th century, the native ecology and landscape of Japan remained only a limited areas such as stream side, water side and forest areas. Therefore, recently the works of forest conservation and erosion control of environmental restoration on stream side tended to increased. The strategic prospects of environmental restoration in Japan were summarized as follows : 1. From the ecological point of view, we have to develop a certain method and technology in construction of forest conservation and erosion control to prevent environmental problem from erosion control works. 2. We have to restore not only a continuity of stream side forest from a primitive area to an estuary but also the stream side forest to preserve and restore a stream side vegetation on a primitive watershed areas. 3. We have to improve a method of construction or removal of a structure which were constructed in the stream to restore a water side environment and an interaction system for an integration on a forest land, stream, and erosion control. Additionally, we have to establish an integrated evaluation method and an enforcement system after investigation of influences on natural environment, stream, and forest etc. 4. We have to conduct an integrated research to investigate the ecosystem of stream side, and construct environmentally friendly water park and erosion control park which considered natural environment and its landscape. Additionally, we need to introduce and adopt a natural style stream construction method to restore a water side areas.