자메이카국의 유역개발계획상의 문제점 분석

우보명 ( Bo Myeong Woo ) 한국산림과학회 1982 한국산림과학회지 Vol.56 No.1

The author of this paper has participated for research on soil conservation and watershed management for two years as an associate Personnel at the Inter-American Institute for Co-operation on Agriculture (IICA-OAS), in Jamaica, This paper is fundamentally based on the author`s experience of researches as well as the results of studies with the references cited. The island of Jamaica having 11,440㎢ was divided into 33 groups of watersheds and eighteen watersheds were identified as severely disturbed areas of mostly upstream. There are approximately 164,000 ha of land in urgent need of rehabilitation and protection including a 36.900 ha of five watersheds first priority needed. A national programme of watershed management to conserve all the watersheds, particularly those inhabited by small farmers is urgently necessary.

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.

산사태지의 식생 회복과정에 관한 기초적 연구 - 용인 · 화성군지역을 대상으로

우보명(Bo Myeong Woo),전기성(Gi Seong Jeon),최형태(Hyeong Tae Choi),정도현(Do Hyun Jeong) 한국산림과학회 1995 한국산림과학회지 Vol.84 No.1

The purpose of this study was to analyze the process of natural plant establishment and revegetation on the slopes of landslide scars, both untreated(l4 plots) and treated plots (14 plots) with rehabilitation measures in 1993 and 1994 at Yongin·Hwaseong-gun region. While total of 61 species were identified at surveyed sites. in the region, the pioneer species on landslide scars were Lespedeza cyrtobotrya, Arundinella hirta, Artemisia princeps, Pteridium acquilinum, Erigeron canadensis. Rubus crataegifolius, Stephanandra incisa etc. The species diversity (H`) and evenness(E`) of the untreated scars were greater than those of the treated scars. Similarity indices in the untreated scars were higher than those in the treated scars, and succession indices showed similar value in both areas. As a conclusion, this study shows that the untreated scars were more influenced by the around-vegetation, and the native vegetations(plants) like Lespedeza cyrtobotrya, Arundinella hirta. Miscanthus sinensis, Artemisia princeps, Pteridium acqutlinum, Erigeron canadensis. Rubus crataegifolius, Stephanandra incisa ete. could be more effectively used as plant vegetation for rehabilitation of landslide scars.

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.

식생이 (植生) 비탈면의 안정에 미치는 영향

우보명 ( Bo Myeong Woo ) 한국산림과학회 1977 한국산림과학회지 Vol.35 No.1

As the development of national lands increase, the necessity to develop less favorable terrain also increases. It also becomes more difficult and complicated to provide access that is both economical and safe from contributing to soil erosion on roadsides and to londscape damages. Because of the increased and justified emphasis upon environmental degradation, proper stabilization of the cut-and bank slopes of roadsides, plant sites and building sites in Korea requires careful planning as well as execution of the constructions. All fill slopes should be compacted to a degree consistent with design standards and material properties. Drainage facilities should be provided to prevent damaging concentrations of surface runoff and to avoid high pore pressures in cuts and fills. All surfaces of cut-fill slopes should be revegetated with suitable species as soon as possible after construction. To stabilize the cut-fill slopes of highway roadsides should be considerded the factor of stabilization as well as landscape conservation especially. Such basic influences as the effects of vegetations on water balance of rain fall, on the control of surface erosion and on the surface slope failures are briefly discussed in the report.

토양침식에 작용하는 몇가지 요인의 영향에 관한 연구

우보명 ( Bo Myeong Woo ) 한국산림과학회 1976 한국산림과학회지 Vol.29 No.1

This study was conducted on the major factors affecting soil erosion and surface run-off. In order to investigate the processes and mechanisms of soil erosion on denuded forest-land in Korea, and to systematize the magnitudes of influences and interactions between individual factors, the five major factors adopted in these experiments are soil textures (coarese sand and clay loam), slope steepness (10°, 20°, 30° and 40°), rainfall intensities (50, 75 and 100mm/hr), slope mulching methods (bare, coarse straw-mat mulching, grass mulching and anti-erosion liquid mulching) and vegetation densities (sparse, moderate and dense). The processes and mechanisms of soil erosion, and the effects of mulchings on soil erosion as well as surface run-off rates were studied algebraically with four parts of laboratory experiments under the simulated rainfall and another part of field experiment under the natural rainfall. The results in this study are summarized as follows: 1. Experiment factors and surface run-off rates The surface run-off rates under the natural rainfall were resulted about 24.7∼28.7% from the bare slopes, about 14.0∼16.4% from the straw-mat mulched slopes, about 7.9∼9.1% from the liquid mulched slopes, and about 5.6∼7.2% from the grass mulched slopes respectively. The surface run-off rates under the simulated rainfall differed greatly according to the rainfall intensity and the mulching method. 2. Magnitudes of influences and interactions of the individual factor on the surface run-off rates. The experimental analyses on the major factors (soils, slopes, rainfalls, mulchings and vegetations) affecting the rates of surface run-off, show that the mean differences of surface run-off rate are significant at 5% level between the soil texture factors, among the slope steepness factors, among the rainfall intensity factors, among the mulching method factors, and among the vegetation density factors respectively. The interactions among the individual factor have a great influence (significant at 1% level) upon the rate of surface run-off, except for the interactions of the factors between soils and slopes; between slopes and vegetations; among soils, slopes and rainfalls; and among soils, slopes and mulchings respectively. On the bare slopes under the simulated rainfall, the magnitude of influences of three factors (soils, slopes and rainfalls) affecting the rate of surface run-off is in the order of the factor of rainfalls, soils and slopes. The magnitude of influences of three factors (soils, rainfalls and mulchings) affecting the rate of surface run-off, on the mulched slopes under the simulated rainfall is in the order of the factor of mulchings, rainfalls and soils and that of influences of the factor of soils, slopes and mulchings is in the order of the factor of mulchings, soils and slopes. On the vegetation growing slopes under the simulated rainfall, the magnitude of influences of three factors (soils, slopes and vegetations) affecting the rate of surface run-off is in the order of the factor of vegetations, soils and slopes. In the same condition of treatments on the field experiment under the natural rainfall, the order of magnitude of influences affecting the rate of surface run-off is the factor of mulchings, soils and slopes. 3. Experiment factors and soil losses The soil losses of the experiment plots differed according to the factors of soil texture, slope steepness, rainfall intensity and mulching method. The soil losses from the coarse soil were increased about 1.1∼1.3 times as compared with that of fine soil under the natural rainfall, while the soil losses from the fine soil were increased about 1.2∼1.3 times compared with that of coarse soil under the simulated rainfall. The equation of E=aS^b (a,b are constant) between the slope steepness (log S) and soil losses (log E) under the simulated rainfall were developed. The equation of E=aI^b (a,b are constant) between the rainfall intensity (log I)

삼림환경이 수자원 함양에 미치는 영향에 관한 연구

우보명 ( Bo Myeong Woo ) 한국산림과학회 1993 한국산림과학회지 Vol.82 No.3

These studies were carried out to investigate water yield from small forested watersheds at Ghoosan Stream-Gauging Stations in Chollanam-do province from May 11, 1991 to December 31, 1992. The purpose of these studies was to obtain useful informations as distribution of precipitation, canopy interception, stemflow, throughfall and run-off from the small forested watersheds. The precipitation at Choosan from May to December, 1991 was 1,306.6mm and at Choosan from January to December, 1992 was 1,143.4㎜. The rate of canopy interception in Pinus taeda stand is 24.3% and 27% in Pinus densiflora stand. The run-off rate from the watershed was 48.87% at Bukmoongol small forested watershed and 41.19% at Baramgol small forested watershed.

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.

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.

황폐산지의 속성녹화공법개발에 (速成綠化工法開發) 관한 연구

우보명 ( Bo Myeong Woo ) 한국산림과학회 1974 한국산림과학회지 Vol.24 No.1

A national programme of erosion control for soil and water conservation needs to be based on factual information about rates and quantities of soil erosion and of eater runoff. The best and simplest way of reducing sedimentation pollution is to prevent or control the erosion at its sources. Steeply sloping earth banks are liable to both surface erosion and land-slides and the key to the control of these form of erosion lies with drainages and dense vegetation establishment including surface mulching on the slopes. Micro-plots having 1.6㎡ (1 metre in width and 1.6 metres in slope length, and 1:1.2 in gradient) of banking slopes on the coarse sand soil are used to establish the order of magnititude of the difference in controlling of soil erosion and water runoff, and in potentiality of execution in consideration of the values of landscapes, performed on the 2 repetetions of six-experiment plots consisted of five surface mulches including seedings and one bare slope as a control treatment. The main results obtained may be summarized as follows: 1. The significant difference is realized in the quantities of soil erosion between the measures of six treatments. 2. Excepting the differences between treatment Ⅲ and Ⅵ, the significant difference is realized in the rate of surface runoff between each treatment measures. 3. Both measures of treatment Ⅱ and Ⅳ are recognized as the most effective measures in controlling the soil erosion and water runoff and also in establishing the ground vegetations. (Treatment Ⅱ is a measures of the coarse straw-mat mulchings on the micro-strip seedings, Treatment Ⅳ is a measures of the $quot;SPRAY-ON method$quot; on the micro-strip seedings). In consideration of the potentiality of execution as well as the value of landscapes, the measures of treatment Ⅱ could be recommendable for establishing the vegetation cover on the denuded gentle slopes in hillsides while the measures of treatment Ⅳ could be suitable for accelerating the establishment of vegetation on steeply sloping earth banks and cuts.