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개설효과에 의한 임도의 유형구분 - 기설임도의 (旣設林道) 분석을 중심으로 -
전경수,이종락,류택규 ( Kyung Soo Jeon,Jong Lak Lee,Taek Kyu Ryu ) 한국산림과학회 1994 한국산림과학회지 Vol.83 No.2
The critical need of forest road for enchanting the additional values of various forest products, in addition, giving more recreational opportunity to citizen, has been recognized. In this study the present author aimed to ascertain the most effective construction working plan of forest road being tit to Korean geographic condition. To execute this research program, four locations in national forest of Kangweon-do district and other four locations in private forest in Chollabuk-do district both where forest roads have previously been constructed were selected to analyze the effectiveness basing upon the various factors separately or in combination. The results are summarized as follows ; 1. The investment efficiency in forest road construction showed to increase in the area where terrain factors and district social factors rate is high, and to decrease in the area where forest status factors and forest road structure factors rate is high. So in future the Forest Resource Development Model of forest road should take more importance particularly on those area having terrain factor ratio is low. The extractable value of constructed forest road based on forest status factors rate is expected to increase in case of high considerably . 2. To construct of forest road for increasing multiple use of forests, forest road should be construct with priority on area where obtained total score by evaluation factors is high. And these evaluation factors should ta4:e possible determine the position of forest road construction. 3. The following five types of forest road basing upan function performance are suggested with regard to the place where road is constructed. (1) Forest Utilization Model : where forest status factors and forest road structure factors rate are over 60% . (2) Forest Resource Development Model ; where terrain factors, forest status factors, forest road structure factors and district social factors rate are less than 60%. (3) Community Development Model : where terrain factors, forest road structure factors and district social factors rate are over 60% but forest status factors rate are less than 60%. (4) Recreation and Health Model ; where terrain factors, forest status factors, forest road structure factors and district social factors rate are over 60%. (5) Multiple Use Model ; where both forest status factors and district social factors rate are over 60% .
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장항제련소 지역의 토양과 수도체중 Pb 함량의 변화에 관한 연구
백승화,류택규,전경수,이만상,김성조,양창휴 한국환경농학회 1992 한국환경농학회지 Vol.11 No.3
대기오염에 따른 Pb의 함량변화 차이를 구명하기 위하여 대기형 오염물질 방출지역으로 장항 제련소 인근지역의 논 토양을 표·심토로 구분하여 1982년도에 표토와 심토로 구분하여 채취한 것과 1990년도에 채취한 토양시료 및 1990년도의 토양시료채취 지역에서 재배된 수도체 시료중 Pb함량을 분석하여 그 변화요인을 추적 분석하였다. 제련소 인근지역의 토양 중 Pb함량은 10.3-644.8 ㎎ ㎏^(-1)였고, 평균함량은 90년 토양이 82년도 토양보다 높았으며, 82년도 표토 중 Pb함량은 90년도 표토 중 Pb함량과 유의성 있는 상관을 나타냈다. 배연의 중심으로 부터 동쪽 방향이 거리별 Pb함량 변화가 뚜렷 하였고, 그 정도는 동쪽>북북동>북동>북쪽 순으로 작아졌다. 또한 배연에 의한 오염반경은 동쪽, 북북동 및 북동에서 3㎞ 였다. 이 지역의 토양 중 Pb함량은 토양의 유기물함량, 유효규산, CEC, 치환성 Ca^(++), Mg^(++)과 Na^+ 함량, 토양 중 Cd 및 Zn 함량과 유의한 상관관계를 나타내었고, 시료로 채취한 수도체의 부위에 따른 Pb함량 차이가 있었다. 현미중 Pb함량은 제련소 인근 지역의 경우 2.2-9.0㎎ ㎏^(-1)이었다. To investigate differences in lead content in soils and paddy rices, affected by air pollutants from the Janghang Smelter, soil samples at the different directions, distances, and depths, surface(0-15㎝ depth) and subsurface(15-30㎝ depth) in 1982 and 1990, and rice plants at soil sampling sites in 1990 were separately collected at the Janghang Smelter area affected by combustible waste gas from the smelter chimney. Soil samples were extracted with 4M-HNO₃ and plant samples were digested with mixture of HNO₃ and HClO₄ for analyzing by atomic absorption spectrophotometry. The Pb contents in soils ranged from 10.3 to 644.8㎎ ㎏^(-1). The average content in 1990 was higher than that in 1982. The Pb content in soils at sites nearer the center of the smelter was higher than that at sites farther from the center. The highest lead content was found at the east direction, and was low in order of east>north-north east>north east > north. The variation of Pb level in soils at east sites was more considerable than other directions. The Pb level in surface soils was higher than that in subsurface soils. The contaminated radius of Pb was until 3km all at east, north-north east and north east. A significant correlation was found between Pb content in surface soils of 1982 and that in surface soils of 1990, between Pb content in soils and contents of Cd and Zn in soils, and between Pb content in soils and soil properties as organic matter, available silicate, cation exchange capacity, exchangeable Ca^(++), Mg^(++) and Na^+. Pb content in brown rice was low in the panicle axis, and brown rice, and Pb content in stem was 3.26 times of that in brown rice. Pb content in brown rice ranged from 2.2 to 9.0 ㎎ ㎏^(-1)
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