간행물
한국환경과학회지 KCI 등재 Journal of Environmental Science International
- 발행기관 한국환경과학회
- 자료유형 학술지
- 간기 월간
- ISSN 1225-4517 (Print)2287-3503 (Online)
- 수록기간 1992 ~ 2023
- 주제분류 자연과학 > 자연과학일반 자연과학 분류의 다른 간행물
- 십진분류KDC 539DDC 628
권호리스트/논문검색
제14권 제3호 (2005년 3월) 12건
1.
2005.03
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The purposes of this study were to investigate visitors' environmental attitudes of educational tourism, environmental preservation, and regional economic benefits satisfaction through the Chunsuman Bay Birdwatching Festival.
The results of this study were as follows: First, the degree of educational satisfaction was high and this festival provided environmental preservation mind for visitors and local residents as well. The festival participants had a positive attitude toward migratory birds. Especially, the residents who had negative perceptions toward migratory birds due to physical harms of agricultural crops was positively changed after visiting this festival. So there should be prepared for more strategic approaches for residents' visiting and participating this birdwatching festival.
Second, while the number of tourists was increased, it did not make a practical contribution to residents' income Particularly, farmers' satisfaction was low. So there should be more strategic programs to improve residents' economic rewards for sustainable development.
2.
2005.03
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This study was carried out to provide the basic data for an identifying system for Iris species distributed in Korean market from complete analysing of genetic relationship between three native Iris species and one cultivar bred from the native Iris plant. RAPD analysis of genetic relationship among 4 Irises was possible. According to the RAPD analysis, they were divided into two groups. Among 4 Irises used in this study, Iris laevigata 'Veriegata', Iris laevigata and Iris setosa were classified into the same group since they had many similarities even though the habitat of Iris laevigata in Korean peninsular is restricted mainly in the south and Iris setosa is naturally inhabited in the northern part of Kangwondo. The value for the dissimilarity index of Iris laevigata and Iris laevigata ‘Veriegata’ was 6.757. The value for the dissimilarity index of Iris laevigata and Iris dichotoma was 95.000, so that they were genetically the farthest among them since the genetic relationship between two species are separated far if the value of the dissimilarity index is close to 100.
3.
2005.03
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This study analyzes the recognition of commercial business men and employers who operate the commercial zone along the streets in the downtown area on the planting for the roadside green space forming the important frame of greening in the downtown among the open spaces. Through the analysis, this study attempts to get the basic data to suggest the recommendable directions in planting and managing the street trees in the downtown. The results of this study are summarized as described below. The street green spaces are very important in improving the environment of the downtown and their necessities are also very critical. It was found that the street trees were recognized as the critical factor to enhance the aesthetical values of the city, provide the green shades and purify the air. This study also identified that the street trees have the positive impacts on the business environment rather than negative impacts. In maintaining the street green spaces, the most necessity is the service facility such as resting areas, toilets and garbage bins with the street trees. The commercial business men and employers who operate the businesses along the streets preferred the double layer type that the tall trees and green walls are planted together along the streets for the street planting. For securing the green shades in the city, the planting of linear green spaces such as streets and waterways is critical. Moreover, the street trees accounts for the important position in the urban open spaces. The majority of commercial business men and employers consider the participation of citizens for greening as the very essential factor.
4.
2005.03
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수도권내 9개 골프장 연못에서 조사된 관속식물은 코리아 CC(Korea CC)에서 95종으로 가장 많은 종이 분포하고 있으며, 은화삼 CC(Eunhwasam CC)에서는 가장 적은 21종류가 조사되었다. 조사된 관속식물은 대체적으로 1～2년생의 단자엽식물과 다년생의 쌍자엽식물로 구성되어 있다. 연못식생의 외래식물과 식재식물의 비율은 지산 CC(Jisan CC)가 52.3%의 비율을 보여 많은 식물들이 외래식물과 식재식물로 구성되어 있으며, 파인크리크 CC(Pine Creek CC)는 21.1%로서 가장 낮은 비율을 보였다. 9개 골프장 중에서 식물군락이 가장 다양한 곳은 파인크리크 CC(Pine Creek CC)로서 총 25개 군락이 조사되었으며, 반자연식생 및 자연식생군락이 16개, 식재 또는 외래식물군락이 9개 군락으로 조사되었다. 전체 연못의 반자연식생 및 자연식생 식물군락 중 수생식물군락은 17개군락으로 조사되었으며, 교란지식생 및 식재군락에서는 12개의 수생식물군락이 조사되었다. 조사된 9개 골프장에서 파인크리크 CC(Pine Creek CC)가 자연식물군락이 대상식물군락 보다 많았으며, 프리스틴벨리 CC(Pristine Valley CC)는 반자연식생 및 자연식생이 조사되지 않았다. 연못식생의 자연성 평가에서는 마이다스벨리 CC (Midas Valley CC)와 파인크리크 CC(Pine Creek CC)가 평가지표에 따른 가치등급에서 높은 자연성을 보였으나, 서서울 CC(Seseoul CC)와 은화삼 CC (Eunhwasam CC)는 가장 낮은 자연성을 보였다. 이들 자연성에 대한 유사성 거리계수의 상대거리에 의한 집단 분류에서는 인위적 식생이 우세한 태영 CC(Taeyoung CC), 은화삼 CC(Eunhwasam CC), 지산 CC(Jisan CC), 서서울 CC(Seseoul CC)가 하나의 군으로 구분되었으며, 반자연적 식생의 특징을 보인 코리아 CC(Korea CC)와 프리스틴벨리 CC (Pristine Valley CC)가 하나의 군으로 조사된 골프장에서 비교적 자연성이 높은 마이다스벨리 CC (Midas Valley CC)와 파인크리크 CC(Pine Creek CC)가 하나의 군을 형성하고 있었다. 블루헤런 CC (Blue Heron CC)는 다른 군과는 또다른 의미로서 구분되었는바, 블루헤런 CC(Blue Heron CC)는 경관적 의미에 대한 가치평가가 높은 결과로서 하나의 군으로 나누어 졌다.
5.
2005.03
서비스 종료(열람 제한)
In this study aims is water supply criteria relations for evaluating the possible performance of water resources systems. These measures describe how likely a systems is to fail(reliability), how quickly it recovers from failure(resiliency), and how severe the consequences of failure may be(vulnerability). The performance of a criteria evaluating with a variety of operating policies illustrates their use. As a result study frequency reliability and quantitative reliability is linear relations and quantitative reliability is high reliability for equality water supply policy. As reliability and vulnerability are in inverse proportion to each other. Therefore these criteria relation analysis can be for Imha dam to variety water supply policy.
6.
2005.03
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Recently air quality modeling studies for industrial complex and large cities located in the coastal regions have been carried out. Especially, the representation of atmospheric flow fields within a model domain is very important, because an adequate air quality simulation requires an accurate portrayal of the realistic three- dimensional wind fields. Therefore this study investigated effect of using high resolution terrain height data and FDDA with observational data to reflect local characteristics in numerical simulation. So the experiments were designed according to FDDA and the detail terrain height with 3sec resolution or not. Case 30s was the experiment using the terrain height data of USGS without FDDA and Case 3s was the experiment using the detail terrain height data of Ministry of Environment without FDDA and Case 3sF was experiment using the detail terrain height data of Ministry of Environment with FDDA. The results of experiments were more remarkable. In Case 3s and Case 3sF, temperature indicated similar tendency comparing to observational data predicting maximum temperature during the daytime and wind speed made weakly for difference of terrain height. Also Case 3sF had more adequate tendency than Case 3s at dawn.
7.
2005.03
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A Study on the Atmospheric Environment and Simulations of Wind Field using MUKLIMO at the KNU Campus
Elements of atmospheric environment, temperature, humidity and wind, at the compus of KNU(Kyungpook National University) were investigated by the observations. The observed data were compared with those of DWS (Daegu Weather Station). The simulations of wind field and dispersions of polluted gases were conducted by MUKLIMO under the various conditions. The results show that the atmospheric environment of KNU are suitable but the campus does not play role as a heat sink in the city. The simulations of wind field show the air flows and wind channels in the campus clearly. The exhausted gases by motor vehicles on the northside street of campus affect very much to the campus with NW(300˚) wind. The running cars in the campus are also pollute much on the campus with the various wind directions. The characteristics of environmental conditions, various meteorological fields, wind channels, and dispersion of exhausted gases at the campus of KNU were understood quantitatively in the study.
8.
2005.03
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The performance of ozone contactor in ozone-BAC advanced water treatment process was evaluated by the degree of decomposition of organic matters. The degree was measured by the analyses of UV254 absorbance and the concentrations of DOC and BDOC for the sand filtered water and the ozone treated water, respectively. In addition, the ozone concentration in the contactor, required for the maximum BDOC concentration, was selected as the optimum concentration, and the appropriate residential time of ozone treated water in a reservoir was recommended based on the residual ozone concentration in the treated water.
The following results were obtained from the pilot scale experiments. By ozonation UV254 absorbance was decreased, and BDOC concentration was increased. The change of DOC concentration by ozonation was negligible, but the excess input of ozone resulted in the removal of the small amount of BDOC by complete oxidation. The optimum ozone concentration was 0.58 mg O3/mg DOC. In order to remove residual ozone, 20 minutes of the residential time were enough after ozonation.
9.
2005.03
서비스 종료(열람 제한)
The objective of this research is to evaluate a feasibility of wastewater reuse by membrane treatment with vibrating membrane separation equipment. Molecular weight of compounds in wastewater, permeability of membrane and retentate characterization after membrane filtration were investigated in order to determine appropriate membrane pore size and materials for wastewater treatment. Selected membrane was evaluated with vibration membrane separation equipment to optimize operating conditions.
The following conclusion are drawn.
1.We got as following test results after the distribution of particles in the semiconductor wastewater, are made up of 1～20㎛. Si, gold and Al in turn are contained in semiconductor wastewater.
2. Recovery rate is changeless under increasing recovery rate in operation. Though a value can be if pressure can be changed, the highest value of permeate rate is presented in 150 psi.
3.The AS-100(polysulpone) was selected as the most appropriate membranes for the treatment of semiconductor wastewater to VSEP system. The fouling almost did not occur during this experiments. The analyses of treated water with VSEP system showed conductivity:0.059㎲/cm, TDS:40㎎/ℓ, COD:20㎎/ℓ, SS:5㎎/ℓ, n-Hexane:8.3㎎/ℓ. Comparing previous systems, operating expenses is decreased by more 50%.
10.
2005.03
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Three-week old Commelina communis was transferred and grown in Hoagland solution containing 100μM Cd2+, 100μM Cd2++100μM kinetin, 100μM Cd2++100μM zeatin and 100μM Cd2++200μM zeatin for 7 days, and then a number of physiological activities were investigated. In control, the length of the stem of plants was increased to 4.7cm, but in Cd2+, Cd2++kinetin, Cd2++100μM zeatin and Cd2++200μM zeatin treatments, the growth of plants were increased to 1.5cm, 2.1cm, 3.9cm and 4.3cm, respectively. In the treatments of Cd2+, Cd2+ +kinetin, Cd2++100μM zeatin and Cd2++200μM zeatin, total chlorophyll contents were reduced to 26%, 24%, 15% and 3%, respectively, on the contrast to the control. In chlorophyll fluorescence experiments, Fv/Fm ratios were also reduced to 44%, 21%, 17% and 5% in the light intensity of 2100μmole E m-2s-1 by Cd2+, Cd2++ kinetin, Cd2++100μM zeatin and Cd2++200μM zeatin treatments on the contrast to the control. Water stresses were increased to 2.6, 1.7 and 1.2 times by Cd2+, Cd2++kinetin and Cd2++100μM zeatin. On the other hand, combination of Cd2++200μM zeatin reduced water stress to 0.12%. In Cd2+ accumulation experiments Cd2+ transports were inhibited to 33%, 48% and 70% by Cd2++kinetin, Cd2++100μM zeatin and Cd2++200μM zeatin. Therefore, it could be concluded that zeatin clearly reduced the toxicities of Cd2+ by reducing the absorption of Cd2+.
11.
2005.03
서비스 종료(열람 제한)
The research in this paper was carried out to examine the BTEX(Benzene, Toluene, Ethylbenzene, Xylene) concentrations in Seongseo Industrial Complex. These compounds are the major constituents, more than 60% in composition of total VOCs, mainly charging in ambient air. BTEX samples were collected from the 38 sites, 10 for the source points and 18 for the boundary sites, and were analyzed by canister-GC/MS. The mean concentrations of BTEX were 33 ppbv for benzene, 214 ppbv for toluene, 89 ppbv for ethylbenzene, 77 ppbv for xylene. Among the BTEX, toluene had the highest concentration in the source points and boundary sites. In the source points, BTEX concentration of incineration facility for hazardous wastewater appeared highly in the range of 220～350 ppbv. BTEX concentrations in source boundary sites appeared in the order of toluene＞ethylbenzene＞xylene＞benzene. As a result of the correlation analysis, the concentration of the source points was related to those of the boundary sites. Correlation of ethylbenzene and xylene was presented to 0.7991(P＜0.01), 0.6329(P＜0.05) as the correlation coefficient, respectively.
12.
2005.03
서비스 종료(열람 제한)
Starch was crosslinked with epichlorohydrin. Crosslinked starch-filled waterborne acrylate (CSWAC) films were prepared by blending this crosslinked starch with waterborne acrylate. The thermal and mechanical properties of these films were investigated by thermogravimetric analysis (TGA), tensile strength and elongation test. The biodegradability was also studied by determination of reduced sugar products after enzymatic hydrolysis and the surface morphology was investigated by scanning electron microscopy (SEM).
The CSWAC film showed significantly higher tensile strength and elongation than those of starch-filled waterbonre acrylate (SWAC). The biodegradability of this film was higher than that of native starch-filled acrylate film, and was increased by the addition of crosslinked starch to the acrylate film.
