• 지질공학
• /
• 제10권2호
• /
• pp.215-233
• /
• 2000

전국의 자연환경에서의 지구화학적 재해를 정량적으로 평가할 수 있는 체계를 구축하기 위하여, 지난 4년간 경기-수도권, 충남, 충북, 전남, 전북 등 국토 서반부 전역(45,000km$^2$)에 분포하는 1-2차 수계(총 11,000 개)의 하천퇴적물(150 $\mu$m 이하의 표사)을 대상으로 주원소 성분 10종과 미량원소 26종에 대해 지화학도를 작성하였다. 각 지질(구성암석)별 자연 배경치, 권역별 방대한 시료의 분석자료의 통계처리에 근거한 평균치 등 다양한 기준치를 설정하고, 유해원소의 과다농집과 필수성분의 결핍현상 등 지구화학적 재해의 유형별 평가에 필요한 등급을 설정.제시하였다. 실제로 몇 가지 지구화학적 재해사례를 권역별로 선별하여 다양한 전산 지화학도와 평가기준치에 근거하여 고찰하였다.

• 패션비즈니스
• /
• 제5권4호
• /
• pp.73-88
• /
• 2001

The purpose of this study was to analyze the consumers' acceptance of the new changes in fashion trend and to project the future possibility of them based on the result of the analysis. It was identified in the review of fashion trend that the major change in the recent fashion trend was the turning of focus from 'Minimalism-influenced' to 'Maximalism-influenced'. Total 176 of Korean women, who preferred 'Minimalism-influenced' or 'Maximalism-influenced' style, were sampled and asked to response on a self-report questionnaire with stimuli developed for this study. According to the respondents’ acceptance and preference of either one of the two streams, each respondent was allocated to one of the two groups which were named as 'Minimal-preference group' or 'Maximal-preference group'. The reasons of their preference, traits in trend-related attitude and demographic variables of both groups were analyzed and compared. The degree of clothing involvement and fashion leadership of Maximal-preference group, who accepted the new trend, were found to be significantly higher than those of Minimal-preference group. Maximal-preference group had significantly higher level of income and expenditure on fashion than Minimal-preference group. The motives and reasons for their acceptance of each stream were also analyzed.

• Journal of Ecology and Environment
• /
• 제43권4호
• /
• pp.461-468
• /
• 2019

Background: This study aimed to identify NO₃^--N sources using the stable isotope δ¹⁵N in Chydorus sphaericus (OF Müller), to investigate hydrological characteristics and nutrient states in artificial wetlands near the Nakdong River. Chydorus sphaericus is dominant in wetlands where aquatic plants are abundant, occurring in high density, and is sensitive to wetland water pollution, making it suitable for identification of NO₃^--N sources. Results: NO₃^--N sources for each wetland were strongly dependent on hydrological characteristics. Wetlands with sewage or rainfall/groundwater as their main sources had high levels of NO₃^--N, whereas wetlands with surface water as their main input had comparatively lower levels. Since wetlands with sewage and rainfall/groundwater as their main water sources were mostly detention ponds, their inputs from tributaries or the main river stream were limited and nutrients such as NO₃^--N easily become concentrated. Changes in NO₃^--N levels at each wetland were closely associated with δ¹⁵N of C. sphaericus. Interestingly, regression analysis also showed positive correlation between δ¹⁵N of C. sphaericus and NO₃^--N level. Conclusions: We conclude that the nitrate stable isotope (δ¹⁵N) of C. sphaericus can be used to elucidate the hydrological characteristics of riverine wetlands. This information is important for maintenance and conservation of artificial wetlands at the Nakdong River.

• 한국환경과학회지
• /
• 제24권6호
• /
• pp.731-741
• /
• 2015

The objectives of study were to evaluate fish species compositions of trophic guilds and tolerance guilds and apply ecological fish assessment (EFA) models to Bekjae Weir, Keum-River Watershed. The EFA models were Stream Index of Biological Integrity (SIBI) used frequently for running water and Lentic Ecosystem Health Assessment (LEHA) used for assessments of stagnant water. The region of Bekjae Weir as a "four major river project" was originally a lotic ecosystem before the weir construction (2010, $B_{WC}$) but became more like lentic-lotic hybrid system after the construction (2011, $A_{WC}$). In the analysis of species composition and ecological bioindicator (fish), fish species with a preference of running water showed significant decreases (p < 0.05), whereas the species with a preference of stagnant water showed significant increases (p < 0.05). After the weir construction, relative abundances of tolerant species increased, and the proportion of insectivores decreased. This phenomenon indicated the changes of biotic compositions in the system by the weir construction. Applications of SIBI and LEHA models to the system showed that the two model values decreased at the same time after the weir construction ($A_{WC}$), and the region became more like lentic-lotic hybrid system, indicating the degradation of ecosystem health. The model values of SIBI were 19 and 16, respectively, in the BWC and AWC, and the health conditions were both "C-rank". In the mean time, the LEHA model analysis showed that the values was 28 in the BWC and 24 in the AWC, thus the health was turned to be "B-Rank" in the BWC and "C-Rank" in the AWC. indicating a degradation of ecological heath after the weir construction.

• 한국습지학회지
• /
• 제21권4호
• /
• pp.290-297
• /
• 2019

하구는 하천이 개방해역과 연결되어 있어 담수와 염수가 만나는 전이지대로 생물다양성이 매우 높고 독특한 생태계를 구성하고 있다. 그러나 하구의 생태적 가치를 인식하기 전부터 다양한 훼손 및 교란이 이루어져 왔으며, 이를 위한 대책이 필요한 실정이다. 하구를 구성하는 하천의 하천기본계획은 지속적인 교란요소로 작용하고 있으나, 수재해로부터 인명피해를 최소화하고 하천의 기능을 강화시켜 국가 수자원을 관리하기 위한 공익적 목적이 있다. 따라서 개발과 생태계 보호라는 대립적 관계가 공존할 수 있는 방안에 대한 연구가 필요하다. 본 연구에서는 이를 위해서 환경창이라는 개념을 이용해 하구 생태계가 개발의 부정적인 영향으로부터 교란이 최소화되는 기간인 저영향 개발 기간을 산정하였다. 본 연구에서 제시한 저영향 개발 기간 산정방법은 향후 이루어질 개발사업이나 교란·훼손 행위 등으로부터 생태계를 보호하기 위한 근거 및 기초자료로 활용될 수 있을 것으로 판단된다.

• 한국환경과학회지
• /
• 제23권4호
• /
• pp.723-735
• /
• 2014

Sediment discharge by long-term runoff in the Nakdong River watershed should be predicted for the maintenance and management of the Nakdong River newly changed by the four major river restoration project. The data establishment by the analysis of runoff and sediment discharge using the long-term watershed model is necessary to predict possible problems by incoming sediments and to prepare countermeasures for the maintenance and management. Therefore, sediment discharges by long-term runoff in the main points of the Nakdong River were calculated using SWAT(soil and water assessment tool) model and the relations and features between rainfall, runoff, and sediment discharge were analyzed in this study. As a result of sediment discharge calculation in the main points of the Nakdong River and tributaries, the sediment discharge at the outlet of the Naesung Stream was greater than the Jindong Station in the Lower Nakdong River from 1999 to 2008 except the years with low precipitation. The sediment discharge at the Nakdong River Estuary Barrage (NREB) was corresponding to 20% of the Jindong Station which is located about 80 km upstream from NREB.

• 농촌계획
• /
• 제23권4호
• /
• pp.143-152
• /
• 2017

In recent years, the proportion of arable land in the nation has grown from 36.2 percent in 1990 to 43.7 percent in 2013. The study first performed the vulnerability assessment of agricultural production, transportation, processing facilities, agricultural machinery leasing facilities, and water supply facilities. It was developed for the evaluation of the vulnerability of each gun of garlic and onions based on the distance from the three groups of arable bodies to the facility and the processing capacity of facilities. In view of these regional imbalances, the store, distribution and processing facilities in the main stream were found in Haenam, South Jeolla-do, and the relatively low regions of the gun were located in Goheung-gun and Hampyeong-gun. Among other regions, agricultural machinery rental facilities were high in Changnyeong-gun, Haenam, and two regions, while the water supply facilities were high in the southern area of Haenam and South Jeolla-do. The Gyeongsang-do showed relatively high levels of comparison vulnerability index compared to Jeolla-do regions. In particular, through the management plan to improve the facilities needed to improve agricultural production infrastructure, it is necessary to increase the competitiveness of agricultural productuivity through the planning of the need for additional support through the rural readjustment project.

• 한국수자원학회:학술대회논문집
• /
• 한국수자원학회 2019년도 학술발표회
• /
• pp.226-226
• /
• 2019

하천은 이수, 치수 및 환경의 기능을 수행하며 국가의 생활과 문화의 발전에 기여한다. 현재 전국에는 총 3,836개의 하천이 존재하며, 우리 실생활에 밀접한 연관을 맺고 있다. 각 부처 및 지자체에서는 하천유역을 개발 및 복구하기 위한 사업을 추진 중에 있으며, 각 사업의 평가를 시행하고 있다. 환경부의 경우 수질개선 및 수생태계 복원을 목적으로 하는 '생태하천 복원사업'을 수행하고 있으며 '지속가능한 하천사업 환경영향평가 가이드라인'을 통해 사업의 적절성 및 사업효과를 평가하고 있다. 또한 본 평가를 토대로 매년 "자연환경대상" 공모전을 개최하여 기술적 사회적 평가 및 대내외적 홍보를 진행하고 있다. 행정안전부는 재해예방 및 환경개선, 수질보전을 목적으로 하는 '소하천 정비사업'을 수행 중에 있으며 매년 "아름다운 소하천 가꾸기 공모전"추진을 통해 소하천정비 예산으로 추진한 사업들의 평가와 시상을 진행 중에 있다. 국토교통부의 경우 물 관리 기본계획인 '물수자원장기종합계획(2001-2020)', '제4차 수자원장기종합계획(2011-2020)'을 토대로 지방하천의 재해예방 및 수생태계 복원목적의 '지방하천정비사업 종합계획'을 수행 중에 있으며 하천재해 예방사업, 수계치수사업 등의 5가지 세부사업들을 포함하고 있다. 또한 하천관리 전문가와 지역주민을 평가단으로 구성하여 평가를 진행하고 있다. 위와 같이 각 부처는 하천유역의 환경개선 및 재해예방을 위해 여러 하천사업을 진행 중에 있으나 각 기관별로 사업의 평가기법 또는 평가절차가 통일되지 않고 상이하게 진행되고 있다. 또한 국토교통부의 경우 하천사업의 사업계획부터 사후평가까지 사업의 전 절차에 대한 명확한 평가기준이 마련되지 않고 있어 효율적인 사업평가가 어렵다는 문제점이 지속적으로 제기되고 있다. 따라서 본 연구에서는 하천사업의 특성을 고려한 평가기법 개발을 통해 사업의 적절성 및 효율성을 제고할 수 있는 방안을 제시하고자 한다.

• 한국환경복원기술학회지
• /
• 제24권3호
• /
• pp.33-47
• /
• 2021

This study was conducted to investigate the influence of eco-friendly restoration in forested bog on the structure of benthic macroinvertebrate community. The benthic macroinvertebrates collected from the surveyed sites were composed of 1,071 individuals, 60 species, 40 families, 13 orders, 6 classes and 5 phyla. At the control and Site 3(small dam), the number of species and individuals were larger than that of other sites, and EPT group ratio was same as well. Considered by index, the dominance index (DI) was found the highest at the biotope area. The diversity index (H') and richness index (RI) were the highest at the control and Site 3. In addition, the ecological score of benthic macroinvertebrate (ESB) showed the highest at site 3, while the lowest at biotope area. The stability and recovery of benthic macrointebrates showed different according to restoration types at forested bog. After restoration project, the benthic macroinvertebrates were observed to get recovery at Site 3, and to have the highest communities stability at control and Site 3. At biotope areas (Site 4, Site 5 and Site 6) communities stability were the lowest, but showed different community stability values according to the presence of water. It is confirmed that the eco-friendly restoration projects indeed provided the better environment for the inhabitation of benthic macroinvertebrate community. The change of community index depending on the restoration projects suggests that the eco-friendly restoration can provide a more suitable environment for benthic macroinvertebrate ecosystem that prefers the stream environment.

• 국제학술발표논문집
• /
• The 1th International Conference on Construction Engineering and Project Management
• /
• pp.1089-1093
• /
• 2005

Proving the effect of lean construction has yet to be done for its staying poor basic building though there has been efforts and wants to introduce the theory and concept of lean construction in practical site. Therefore, we need to specify the methods of productivity improvement and construction process through various adaptations in the site. Also, to apply such improvement methods systematically, we need active participation of owners, contractors and supply chain members in relation to construction industry and are also require appropriate methods to adapt. At first, this study thinks over the techniques of lean construction that has been verified through studies carried before. For second, it selects the technique of lean construction with the practicality in the construction site. For third, it is aimed to make a manual of lean process management by the use of TACT and V.S.M. For fifth, it will show the method of management for repeated activity and develop a guide-line and procedure that applies the concept of work sequence and resource equalization to each phase of process management. At last, it will show methods of reflecting V.S.M. to improve and grasp the waste factor from the step of managing an activity process and develop the form to analyze the waste in construction site by mapping the value flow.