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충남 금산 폐탄광지역의 토양 , 하상퇴적물 및 토양수의 이화학적 특성
민일식,김명희,송석환 ( Ell Sik Min,Myung Hee Kim,Suck Hwan Song ) 한국산림과학회 1997 한국산림과학회지 Vol.86 No.3
The research has been made for the effects of the pollution by the abandoned coal mine drainage on the physical and chemical properties of soil, stream sediment and soil water. The soils overspreaded by the abandoned coal don`t develop solum and the bulk density is 1.838/㎥, compared with 1.191.38g/㎥ in the other forest soils. The soil pH range in coal bearing region ie, from 4.01 to 4.11 and non-coal bearing soil range is from 5.03 to 5.13. Heavy metals such as As, Cr, Ni, Mo and Ba of coal bearing soils and polluted stream sediments have larger concentration than those of non-coal content and non-polluted. F_specially As and Mo concentrations are largely high in coal bearing. The relative ratios K₂O/Na₂O of geochemical elements are higher in coal bearing soil and polluted stream sediments than those of non-coal bearing soils and non-polluted stream sediments as well as black shales of the Changri Formation. However, MgO+Fe₂O₃+TiO₂/CaO+K₂O are the opposite trends, so that the ratios are lower in the polluted regions. The soil water pHs in the polluted regions are the strong acid(pH3.4-4.2) and buffer capacity of the polluted soil is low because canons such as Na^+, K^+, Mg^(+2) are leached by the acidification.
토양의 물리적 조건이 은수원사시나무 ( Populus alba × P . glandulosa ) 의 생장 및 근계발달에 (根系發達) 미치는 영향 - 용적중을 (容積重) 중심으로
민일식,이수욱 ( Ell Sik Min,Soo Wook Lee ) 한국산림과학회 1984 한국산림과학회지 Vol.66 No.1
This experiment has been made to find out the influence of soil bulk density on growth and root development of Pnpulus alba × P. glandulosa in Buyeo-kun, Chungnam. Bulk density and porosity significantly change according to slope position and soil depth and have a significant effect on tree height, DBH, biomass, and the distribution of root development. The results extracted from the experiments are as follows; 1 j Bulk density in average changes from 1.17 g/㎤ (1.05 ∼ 1.40) in lower slope position to 1.43 g/㎤ (1.36 ∼ 1.60) in upper slope position, and porosity from 52.65% (55.05 ∼ 45.50) in lower slope position to 41.20% (43.81 ∼ 37.21) in upper slope position. 2) Bulk density increases significantly with soil depth. 3) Tree height, DBH, and total biomass decrease with bulk density. 4) Foliage, branch, holewood, bolebark, and root also significantly have a negative correlation with hulk density. 5) Populus alba × P. glandulosa has a shallow root system chietly distributing only in AI horizon, and critical bulk density is 1 40 g/㎤. Therefore, slope position, hulk density, and porosity are considered to influence on the growth, biomass, and root development of Populus alba × P. glandulosa.
인공산성우가 삼림토양의 (森林土壤) 완충능에 (緩衝能) 미치는 영향
민일식(Ell Sik Min),이수욱(Soo Wook Lee) 한국산림과학회 1990 한국산림과학회지 Vol.79 No.4
A research effort has been made to determine soil buffer capacity in forest soils nearby urban and industrialized regions. Buffer capacities of soils from four regions were measured by different pH levels of artificial acid precipitation, The following conclusions have been drawn in response to the overall research objectives. Soil Suffer capacity was the highest in Kangwondo followed by Uisan, Yeochon and Seoul when simulated acid precipitation were treated at the level of pH 3.0-5.7. With the acid precipitation treatment below pH 2.0 level, however, the capacity dropped seriously with rno significant differences between the regions. In Kangwondo region soils weathered from granite and limestone showed significant differences in the buffer capacities. Soil collected in Seoul and Ulsean revealed that the capacities tended to increase with the distance from the pollution sources when treated at pH 3.0, 4.5 and 5.7 level of acid precipitation. The major mechanism of soil buffer observed during simulated acid precipitation experiment was canon exchange for Kangwondo forest soils. In Seoul region canon exchange also played an important role in soil buffering under artificial acid precipitation between 3.0 and 5.7 pH levels, yet under pH 2.0 level aluminum and silicate hydrolysis. In Ulsan canon exchange was a msjor determinant for the buffer capacity above pH 4.5 level, between pH 3.0-4.5 aluminum hydrolysis and below pH 3.0 aluminum and silicate hydrolysis. In Yeochon silicate hydrolysis led buffer capacity above pH 4.5 and below pH 4.5 aluminum hydrolysis.
계룡산 국립공원 방문객의 방문선택 결정을 위한 IPA 분석
민일식(Min, Ell Sik),이용철(Lee, Yong Chul) 한국산림휴양복지학회 2015 한국산림휴양학회지 Vol.19 No.4
본 연구는 계룡산국립공원을 방문한 방문객들을 대상으로 방문시 선택결정요인의 특성을 파악함으로써 국립공원이 가지고 있는 긍정적 이미지를 부각시킴으로써 국립공원의 관광자원개발 및 방문객의 지속적인 방문을 통한 국립공원의 활성화에 도움이 되고자 하였다. 본 연구의 목적을 달성하기 위하여 대응표본 t-검증과 IPA(Importance-Performance Analysis)분석을 활용한 결과, 첫째, 계룡산 국립공원의 방문선택결정 요인은 방문시 중요도와 방문경험 후 성취도에는 차이가 있는 것으로 분석되어 귀무가설이 기각됨으로써 국립공원 방문객들의 방문선택결정요인에는 차이를 보이고 있었다. 둘째, 계룡산 국립공원 방문결정 선택요인의 중요도에서 성취도를 뺀 값은 성취도를 가늠할 수 있는 지표이다. 본 연구 결과 모든 항목에서 양(+)의 값이 도출됨으로써 중요도에 비해 성취도가 매우 낮은 것으로 분석되었다. 마지막으로 IPA분석결과, 유지측면은 편의시설 및 접근성의 변수가 포함되었다. 집중측면은 국립공원 운영 및 관리성, 구매성의 변수가 포함되었다. 저순위측면에는 프로그램성이 포함된 것으로 분석되었다. The purpose of this research is to enhance the tourists’ visits to the National Park by highlighting the positive images of the National Park by characterizing the factors affecting the site selecting decisions of the visitors of Gyeryongsan National Park. To achieve this goal, we have used IPA (Importance-Performance Analysis) and the paired T-test on the corresponding samples and we have obtained following results. Firstly, as for the factors affecting the selecting decisions, there is a distinct difference between the visiting importance and post-visit achievement so the null hypothesis is rejected, hence the factors affecting decisions are different from Selecting Decision Factors. Secondly, the importance of selection factor with the achievement removed becomes an index to estimate the postvisit achievement. From the result of this research, all the items turned out to be positive (+) and thus the achievement is low when compared to the importance. Lastly, from the result of IPA, accessability and convenience facilities were considered into keeping up the good work criteria. The concentration aspect included the operation, the management and the purchase capability of the National Park. The low priority aspect includes the programmability.
대기오염 및 산성우가 (酸性雨) 삼림생태계의 토양산도 (土壤酸度) 및 양료분포에 (養料分布) 미치는 영향
이수욱,민일식 ( Soo Wook Lee,Ill Sik Min ) 한국산림과학회 1989 한국산림과학회지 Vol.78 No.1
Four regions have been selected and surveyed to investigate the effects of air pollution and acid deposition on forest ecosystem. They were Seoul as urban region, Yeochon and Ulsan as industrialized region, and Kangwondo as uncontaminated region. Soil pH and the distribution of elements were analyzed in process of time for three years as well as by distance from pollution sources. In general, forest soils acidified in process of time from pollution sources to suburban areas. Hydrogen ion concentration in forest soils increased in 1988 as much as 60% of that in previous year. Average soil pH values in coniferous forest were 4.45 in Seoul, 4.54 in Yeochon, 4.81 in Ulsan, and 6.03 in Kangwondo. Forest soil pH increased with the distance from pollution sources to suburban areas at constant rate within short ranges (up to 30 ㎞) and at decreasing rate within long ranges (up to 200 ㎞). On the contrary, sulfur content in soils decreased every year except in Yeochon region. Base saturation of forest soils in polluted regions were all below 20% level compared with 70% in Kangwondo region. Active aluminum content in soils increased with the soil acidification at the highest rate in Yeochon, and the next in Ulsan and Seoul, Heavy metal content such as copper and zinc in tree tissues were the lowest in Kangwondo region, and the next in Yeochon, Seoul and Ulsan.