산사태방재대책에 관한 연구

우보명 ( Bo Myeong Woo ) 한국산림과학회 1984 한국산림과학회지 Vol.63 No.1

Analysing the reports of disaster-related, average annual death of lives due to the meteorological disasters amounted to be 250, of which about 90 were due to landslide. According to the last 10-year reports, the average area of landslide occurred reaches 275 hectares per year in Korea. The total cost for rehabilitation could annually require more than about 2 billion Won (about US$ 2.5 million). The basic countermeasure policy against such heavy disasters should be definitely taken on prevention rather than rehabilitation after being damaged. However, prevention countermeasures against landslide-related disasters have not been strengthened in Korea although being important. Areas of high landslide hazard must be designated with increase in number from current 10 (35 cities and counties) to 17 (68 cities and counties included : Table 3). Number of regional Erosion Control Stations taking full charge of rehabilitating works on the damaged land resulted from landslide disaster has to increase from currently 15 stations to 25. The stone buttressed terrace structures on the hillside slopes, being typical erosion control measures in Korea have been recently recognized as one of the most effective rehabilitation measures for the land damaged by landslides.

도로비탈면의 경관안정을 위한 기본모델 설정에 관한 연구

우보명 ( Bo Myeong Woo ) 한국산림과학회 1983 한국산림과학회지 Vol.61 No.1

To develope the fundamental models suitable for slope stabilization and scenic effect improvement of the roadside slopes, this study has continuously been conducted for last about 10 years through the field survey and observations on the roadside slopes of 100 plots located in the Capital region. The results obtained could be summarized as follows: 1) In general, due to unsuitable treatments and constructions to the man-made bare slope characteristics of the roadsides, the treatment aims for stabilizing and improving the scenic beauty of the slopes have not been successfully reached in the surveyed regions. 2) Particularly, because of insufficiency of the follow-up maintenance techniques to the roadside slopes treated, denudations of slope scenery established as well as the withering of the vegetation planted have been accelerated for the most part of the slopes treated. 3) 6 fundamental models for the roadside slope treatments have been developed and could be edaptable to the nation-wide purposes. The fundamental models are the model of forest scenery match plantation, roadside scenery establishment, denuded land rehabilitation, rock slope greenification, absolute stabilization, and environmental plantation belt establishment, respectively.

경사지 농업기술 개량을 위한 효과적인 토양보전공법 개발에 관한 연구

우보명 ( Bo Myeong Woo ) 한국산림과학회 1981 한국산림과학회지 Vol.54 No.1

The run-off experiment plots had been established for eight sets of plot comprising foru treatments with two repokcations on 20˚ slope land having the Wait A·Bit Clay soil(locally known), at the Olive River Soil Conservation Centre, Trelawny in Jamaica. The location of plots was about 820 metres m.s.l. and sloped north-west. Each plot size was determined as 40 ㎡ having 2.7 m wide and 15.8 m long along slope. All of the run-off soil and water were collected by using the receiving tanks through the collection troughs and conveyance pipes. these run-off materials were measured and sampled, dried and computed for determination of the soil loss from each treatment of plots. During the first period of experiment for about 10 month which was one crop-year cycle of yam crop. total amount of 1,295 mm rainfall received. The heaviest daily rainfall was recorded as 116.2 mm on August 5 followed by 100.5 mm on August 6, 1980 The soil sediment had been collected and analysed for eleven times during this experiment. Total amounts of soil sediment as over-dried weight by the treatment plot were estimated as 182 ton/ha from treatment IV, respectively. It is recommendable at pre3sent that the treatment III and IV measure which treated with contour mounds with the hillside ditch and grass buffer strip should be adopt4ed for hillside farming particularly with yam cultivation in Jamaica.

사막화방지 및 방사기술개발에 관한 연구 ( 4 ) - 중국의 사구고정 및 방사공법분석 -

우보명(Bo Myeong Woo),이경준(Kyung Joon Lee),최형태(Hyung Tae Choi),이상호(Sang Ho Lee),박주원(Joo Won Park),왕례선(Li Xian Wang),장극빈(Ke Bin Zhang),손보평(Bao Ping Sun) 한국산림과학회 2001 한국산림과학회지 Vol.90 No.3

This study is aimed to analyze and to evaluate the technology development for sanddune fixation and sandy land conservation in China, resulting from the project of $quot;Studies on the desertification combating and sand industry development$quot;. There are various types of sanddunes, including shrub-bunch type, dendritic, honey combed lattice, crescentic, parabolic, pyramid, complex and irregular types, domed, and so on. The height distribution ratios of these sanddunes are 13% of less than 5m, 17% of 6∼10m, 18% of 11∼25m, 14% of 26∼50m, 28% of 51∼100m, 10% of more than 100m, and so on. In dry land of China, shifting direction of the sanddune is mainly varying with main direction of wind, but types of shifting sanddunes have many differences in accordance with region, topography, size and shape of sanddunes. The main sanddune fixation technologies could be divided into the bio-ecological measures, physical measures and chemical measures. The bio-ecological measures include such vegetation measures as shrub-grasses measures, sandbreaks between sand dunes, sand fixation shelterblets and establishment of farmland shelterbelts, etc. The physical measures include establishment of high-sanddune stabilization walls and low-sanddune stabilization walls, sanddune fixation levees and coverage method with sediment clay, etc. The chemical measures include fixation-materials spraying and synthetical liquid spraying methods, etc. Besides, irrigation and sand settlement measures, shifting sand trapping channel, ditchsand fixation measures, etc. have been effectively applied.

사방공 (砂防工) 용어 제정에 관한 기초적 연구

우보명 ( Bo Myeong Woo ) 한국산림과학회 1973 한국산림과학회지 Vol.19 No.1

The study was made to examine basic data for the eventual establishment of scientific terms in forestry and also propose tentatively correct terms in the soil erosion control measures in various fields of rehabilitation works. The 30 foundamental measures and 279 measures concerned with soil erosion control works are collected and arranged in sequence of gully, hillside, and sanddune erosion control measures and in order of Chinese, Korean and English respectively.

사막화방지 및 방사기술개발에 관한 연구 (3) - 중국의 황막사지 녹화기술분석 -

우보명(Bo Myeong Woo),이경준(Kyung Joon Lee),최형태(Hyung Tae Choi),이상호(Sang Ho Lee),박주원(Joo Won Park),왕예선(Li Xian Wang),장극빈(Ke Bin Zhang),손보평(Bao Ping Sun) 한국산림과학회 2001 한국산림과학회지 Vol.90 No.1

This study is aimed to analyze and to evaluate the revegetation and soil conservation technology in desertification-affected sandy land, resulting from the project of $quot;Studies on the desertification combating and sand industry development$quot;. Main native plants for combating desertification : The general characteristics of vegetation distribution in desertified regions are partially concentrated vegetation distribution types including the a) desert plants in low zone of desert or sanddune of depressed basin, b) salt-resistant plants around saline lakes, c) grouped vegetation with Poplar and Chinese Tamarix of freshwater-lakes, saline-lakes and river-banks, d) gobi vegetation of gravel desert and e) grassland and oasis-woods around the alluvial fan of rivers, etc. Generally, Tamarix ehinensis Lour., Haloxylon ammodendron Bunge., Calligonum spp., Populus euphratica Oliver., Elaeagnus angustifolia L., Ulmus pumila L., Salix spp., Hedysarum spp., Caragana spp., Xanthoceras sorbifolia Bunge., Nitraria tangutorum Bobr., Lespedeza bicolor, Alhagi sparsifolia Shap.. Capparis spinosa L_ Artemisia arenaria DC., etc. are widely distributed in desertified regions. It is necessary for conducting research in the native plants in desertified regions. Analysis of intensive revegetation technology system for combating desertification : In the wind erosion region, the experimental research projects of rational farming systems (regional planning, shelterbelts system, protection system of oasis, establishment of irrigation-channel networks and management technology of enormous farmlands, etc.), rational utilization technology of plant resources (fuelwood, medicinal plants, grazing and grassland management, etc.), utilization technology of water resources (management and planning of watershed, construction of channel and technology of water saving and irrigation, etc.), establishment of sheltetbelts, control of population increase and increased production technology of agricultural forest, fuelwood and feed, etc. are preponderantly being promoted. And in water erosion region, the experimental research projects of development of rational utilization technology of land and vegetation, engineering technology and protection technology of crops, etc. are being promoed in priority. And also, the experimental researches on the methods of utilization of water (irrigation, drainage, washing and rice cultivation, etc.), agricultural methods (reclamation of land, agronomy, fertilization, seeding, crop rotation, mixed-cultivation and soil dressing works, etc.) and biological methods (cultivation of salt-resistant crops and green manure and tree plantation, etc.) for improvement of saline soil and alkaline soil in desertified-lands are actively being promoted. And the international cooperations on the revegetation technology development projects of desertified-lands are sincerely being required.

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.

고속도로 절토비탈면의 식생천이과정에 관한 연구 - 중부고속도로를 중심으로 -

우보명(Bo Myeong Woo),김남춘(Nam Choon Kim),김경훈(Kyung Hoon Kim),전기성(Gi Seong Jeon) 한국산림과학회 1996 한국산림과학회지 Vol.85 No.3

This study was carried out to find the plant succession stage on highway cut-slopes. In order to analyze succession stage, plant survey with belt transect method was carried out in 1989 and 1995 at Joongbu-highway cut-slopes. The results could be summarized as follows ; The mean plant coverage of cut-slope was 78.3%. Plant coverage of Lower part area was higher than that of upper part area. Pioneer herb species on cut-slope were Miscanthus spp., Arundinella spp., Artemisia spp. etc., and pioneer woody species were Rubus crataegifolius, Robinia pseudoacacia, Pueraria thunbergiana, Pinus spp. etc. Also, among the introduced turf grasses, Eragrostis curvula is the pioneer species. Due to short of maintenance works, Zoysia japonica which has been planted by sodding work was found to decrease or diminish gradually. The ratio of pioneer stage plants, domestic and introduced herb species, seems to decrease, while the ratio of woody species which are advanced stage plants seems to increase. Maintenance works are needed to management and monitoring of plant succession on cut-slope, and use of herb and woody species will be effective.

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.

고속도로 비탈면에서 주변환경을 고려한 녹화공법과 식생선발에 관한 연구

우보명(Bo Myeong Woo),전기성(Gi Seong Jeon),김경훈(Kyung Hoon Kim),최형태(Hyung Tae Choi) 한국산림과학회 1996 한국산림과학회지 Vol.85 No.4

This study was carried out from March 1995 to February 1996 to select suitable vegetation and measures for revegetation on the highway cut-slope in consideration of the surrounding environment in the middle region of Korea. The numbers of revegetation-measures type surveyed were eighteen measures as a whole in descending order of the Seed-spraying measures, Block-sod pitching measures, and Straw-mat mulching measures. The numbers of vegetation species by highway line were 243 in Chungbu, 223 in Jungang, 210 in Kyongbu 2, 199 in Kyongbu 1, 179 in Sohaean, 163 in Seoul circulation. 148 in Shingal-ansan, 141 in Second kyongin and 123 in Kyongin respectively. The highest index of species diversity(H`) was in Kyongbu 1-line and the evenness(E`) on upper site was greater than that of the lower site. The revegetation measures were selected in consideration of nature of soil, gradient, area and situation, and 83 species were selected as those for revegetation measures in highway cut-slope.