• 한국환경복원기술학회지
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• 제26권3호
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• pp.29-42
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• 2023

As the destruction of habitats due to recent development continues, there is also increasing interest in endangered species. Mankyua chejuense is a vulnerable species that is sensitive to changes in population and habitat, and it has recently been upgraded from Endangered Species II to Endangered Species I, requiring significant management efforts. So in this study, we analyzed the potential habitats of Mankyua chejuense using MaxEnt(Maximum Entropy) modeling. We developed three models: one that considered only environmental characteristics, one that considered artificial factors, and one that reflected the habitat of dominant tree species in the overstory. Based on previous studies, we incorporated environmental and human influence factors for the habitats of Mankyua chejuense into spatial information, and we also used the habitat distribution models of dominant tree species, including Ulmus parvifolia, Maclura tricuspidata, and Ligustrum obtusifolium, that have been previously identified as major overstory species of Mankyua chejuense. Our analysis revealed that rock exposure, elevation, slope, forest type, building density, and soil type were the main factors determining the potential habitat of Mankyua chejuense. Differences among the three models were observed in the edges of the habitats due to human influence factors, and results varied depending on the similarity of the habitats of Mankyua chejuense and the dominant tree species in the overstory. The potential habitats of Mankyua chejuense presented in this study include areas where the species could potentially inhabit in addition to existing habitats. Therefore, these results can be used for the conservation and management planning of Mankyua chejuense.

• 한국환경복원기술학회지
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• 제26권3호
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• pp.43-55
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• 2023

The railway project is an essential green transportation tool that is considered suitable for the domestic and foreign policy direction of carbon neutrality, but there are some limitations, such as damaging important carbon absorption sources during construction. This study analyzed the environmental impact assessment related to carbon absorption sources of greenhouse gas evaluation items conducted during the railway project, and limitations and implications were derived. The analysis of environmental impact assessment guidelines related to railway projects and carbon absorption sources dealt with prediction and reduction methods related to carbon absorption sources, but guidelines, including environmentally friendly railway construction guidelines, lacked descriptions. Since the greenhouse gas environmental impact assessment, 83 railway project environmental impact assessments have been reviewed, but in some cases, carbon absorption-related predictions have not been implemented, or carbon absorption-related reduction measures have been insufficient. In addition, there were cases where there was a limit to calculating emissions and reduction or where the reduction value was insignificant compared to emissions. In order to supplement the environmental impact assessment in the field of carbon absorption sources related to railway construction projects, alternatives such as quantitative emission and low reduction calculation, review of the no net loss system using the total environmental resource system, and linkage with climate change impact assessment are needed.

• 한국환경과학회지
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• 제32권10호
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• pp.675-684
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• 2023

In this study, the water supply reliability of the andong and Imha dam was analyzed using inflow data for 360 months from 1993 to 2022 through allocation model. First, in the analysis results of additional water supply to Deagu city, the water supply reliability of Rule (B) was the highest at 86% for andong dam, 84% for imha dam, and 80% for the control point. However, when the planned supply was supplied, the analysis results showed 94%, 93%, and 90%. Next, in the quantitative reliability analysis results, when considering additional water supply to Deagu city, Rule (A), Rule (B), and Rule (C) were analyzed as 88%, 88%, and 88%, respectively, based on the control point. When supplying the planned water supply, the quantitative reliability analysis results were 95% equally based on Rule (A), Rule (B), and Rule (C). Because of evaluating the two reliability methods, the number of shortages increases significantly when additional water is supplied to Daegu City, but the shortage is generally 5-7%, resulting in a relatively small shortage compared with the increase in the number of shortages. In the case of resilience and vulnerability, additional water supply to Daegu City takes more than two months to restore than the existing planned water supply, and the average shortage was calculated to be smaller than that of supplying the planned water. According to the results of the analysis, Andong dam has an average water storage of 130x106 m² and Imha dam has 50x106 m². In this deficient water supply can be compensated by water from the Nakdong river.

• Advances in concrete construction
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• 제16권1호
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• pp.69-78
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• 2023

This investigation delves into the adverse repercussions stemming from the impact of arsenic on steel pipes concealed within soil designated for rice cultivation. Simultaneously, the study aims to ascertain effective techniques for detecting arsenic in the soil and to provide strategies for mitigating the corrosion of steel pipes. The realm of nanotechnology presents promising avenues for addressing the intricate intersection of renewable energy, oil, and environmental pollution from a novel perspective. Nanostructured materials, characterized by distinct chemical and physical attributes, unveil novel pathways for pioneering materials that exert a substantial impact across diverse realms of food production, storage, packaging, and quality control. Within the scope of the food industry, the scope of nanotechnology encompasses processes, storage methodologies, packaging paradigms, and safeguards to ensure the safety of consumables. Of particular note, silver nanoparticles, in addition to their commendable antibacterial efficacy, boast anti-fungal and anti-inflammatory prowess, environmental compatibility, minimal irritability and allergenicity, resilience to microbial antagonism, thermal stability, and robustness. Confronting the pressing issue of arsenic contamination within both environmental settings and the food supply is of paramount importance to preserve public health and ecological equilibrium. In response, this study introduces detection kits predicated upon silver nanoparticles, providing an expeditious and economically feasible avenue for identifying arsenic concentrations ranging from 0.5 to 3 ppm within rice. Subsequent quantification employs Hydride Atomic Absorption Spectroscopy (HG-AAS), which features a detection threshold of 0.05 ㎍/l. A salient advantage inherent in the HG-AAS methodology lies in its capacity to segregate analytes from the sample matrix, thereby significantly reducing instances of spectral interference. Importantly, the presence of arsenic in the soil beneath rice cultivation establishes a causative link to steel pipe corrosion, with potential consequences extending to food contamination-an intricate facet embedded within the broader tapestry of renewable energy, oil, and environmental pollution.

• 농촌계획
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• 제30권1호
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• pp.43-55
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• 2024

The purpose of this study is to examine residents' perspectives on factors contributing to rural decline, including population decrease and landscape degradation, with the goal of proposing strategies to revitalize rural spaces in response to these challenges. After exploring rural decline issues in Jinan, a questionnaire was developed based on a review of existing research. Following this, participants were selected, and Focus Group Interviews(FGI) were conducted. Through the analysis of the findings, strategies for local revitalization were suggested in four sectors. Based on the research findings, there is a need to reassess public transportation and vacant property projects. On the social front, preventing the misuse of rural relocation policies and enhancing residential environments through spatial clarity are essential. Environmentally, clustering renewable energy and livestock facilities and attracting educational facilities are necessary to minimize disruption to rural landscapes. From a governance perspective, fostering entrepreneurship in rural tourism and business models utilizing the local landscape is crucial for an increase in regional visits. This study holds significance by emphasizing the practical situation of rural decline, steering away from resource-centric or business-focused policies. It underscores the potential usefulness of integrating this understanding into detailed planning within policies aimed at tackling rural decline.

• 한국환경복원기술학회지
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• 제24권6호
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• pp.49-65
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• 2021

Although the Environmental Impact Assessment (EIA) is continuously being advanced, the number of environmental disputes regarding it is still on the rise. In order to supplement this, it is necessary to analyze the accumulated complaint cases. In this study, through the analysis of complaint cases, it is possible to identify matters that need to be improved in the existing EIA stages as well as various damages and conflicts that were not previously considered or predicted. In the process, we dervied 'complaint-based data demands' that should be additionally examined to improve the EIA. To this end, a total of 348 news articles were collected by searching with combinations of 'environmental impact assessment' and a keyword for each of the six assessment groups. As a result of analysis of collected data, a total of 54 complaint-based data demands were suggested. Among those were 15 items including 'impact of changes in seawater flow on water quality' in the category of water environment; 13 items including 'area of green buffer zone' in atmospheric environment; 10 items including 'impact of soundproof wall on wind corridor' in living environment; 8 items including 'expected number of users' in socioeconomic environment, 4 items including 'feasibility assessment of development site in terms of environmental and ecological aspects' in natural ecological environment; and 4 items including 'prediction of sediment runoff and damaged areas according to the increase in intensity and frequency of torrential rain' in land environment. In future research, more systematic complaint collection and analysis as well as specific provision methods regarding stages, subjects, and forms of use should be sought to apply the derived data demands in the actual EIA process. It is expected that this study can serve to advance the prediction and assessment of EIA in the future and to minimize environmental impact as well as social conflict in advance.

• 환경생물
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• 제37권4호
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• pp.749-758
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• 2019

본 연구의 목적은 질산, 황산, 암모니아수, 과산화수소에 대한 생태독성평가를 통해서 사고대비물질들에 대한 기초 독성 데이터베이스를 구축하여, 향후 화학사고 발생시 환경 피해에 관한 의사결정에 과학적 근거를 제공하는 데 있다. 이를 위해 본 연구에서는 사고대비물질 중 토양의 물리·화학적 성질을 변화시킬 수 있는 질산, 황산, 암모니아수, 과산화수소를 대상으로 국내 토착 절지동물인 김어리톡토기(Paronychiurus kimi)를 이용한 생태독성평가를 수행하였다. 7일간의 급성독성평가와 28일간의 만성독성평가를 수행하였으며, 시험물질 농도에 따른 토양의 pH 변화를 관찰하였다. 토양의 pH는 질산, 황산, 과산화수소, 암모니아수의 농도가 10,000 mg kg^-1 soil dry wt.일 때, 각각 2.86, 2.72, 7.18, 9.69이었다. 질산, 황산, 과산화수소, 암모니아수에 대한 만성독성평가 결과, LC₅₀ 값은 각각 2,703, 5,414, 3,158, 859 mg kg^-1 soil dry wt.이었으며, P. kimi의 산란 수에 대한 EC₅₀ 값은 각각 587, 2,148, 1,300, 216 mg kg^-1 soil dry wt.이었다. 비록 본 연구에서는 사고대비물질들의 유입에 따른 토양 pH의 변화만이 조사되었지만, 본 연구의 결과는 P. kimi가 사고대비물질에 의해 변화된 토양의 pH뿐만 아니라 사고대비물질의 유입에 의해 감소된 유기물 함량과 생성된 반응 산물에 의해서도 사망률과 산란수에 영향을 받을 수 있음을 의미한다. 대부분의 사고대비물질들이 토양의 특성을 변화시킬 수 있다는 점을 감안할 때, 토양의 특성 변화와 이에 따른 생물 영향을 고려한 화학사고 후 평가 및 복원 방법이 필요하다.

• Ecology and Resilient Infrastructure
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• 제3권3호
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• pp.182-188
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• 2016

본 연구는 도시 홍수문제의 구조적 해결방안을 도출하기 위하여 내구성-비용지수 (robustness cost index, RCI)를 수질오염 문제 사례에 재해석 및 적용하였다. 처리기준 산정방식이 다른 하수 처리수 내 내생호르몬 오염과 취수원 원생동물 번성을 대표 사례로 선정하여 기존시설과 대안시설 (구조적 대안)의 내구성 지수 (RI) 값이 1 이상인 경우를 내구성을 확보한 대안으로 판정하고 내구성 지수와 비용지수 (CI)를 결합한 RCI 값을 산정하였다. 하수 처리수 내 내생호르몬 오염은 인체로부터 기인하는 $17{\beta}$-estradiol 을 대상 오염물질로 하여 현재 하수처리시설과 대안시설 (고도처리공정 증축)을 비교하였고, 고도처리공정을 증축한 사례에서 RI뿐만 아니라 RCI 값이 큰 결과가 나타났다. 취수원 원생동물 번성의 경우 크립토스포리디움을 처리하기 위한 소독방안으로 자외선 소독과 오존 소독을 대상으로 RCI를 산정하였고 오존 소독시설이 RCI값이 더 높은 것을 확인하였다. 처리기준이 다른 수질오염사례의 RCI 산정과정과 도출한 값을 바탕으로 재해 발생 시 피해 복구와 피해 방지를 위한 구조적 대안 수립과정의 방향을 제시하고 그 구축전략을 제안하였다.

• Ecology and Resilient Infrastructure
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• 제3권2호
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• pp.117-125
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• 2016

도시 내 인구집중과 기후변화로 인해 다양한 형태의 도시 물 문제가 발생한다. 이에 대한 피해 예방과 사회적 손실 최소화를 위해 회복탄력적인 대안 수립이 필요하다. 본 연구는 도시 물 문제 저감을 위한 회복탄력적 사회기반시설 구축 전략 수립에 관한 기초연구로서, 대표적인 도시 물 문제 중 하나인 도시홍수를 사례로 하여 구조적 대안의 내구성을 평가하였다. 내구성 평가를 위한 지표로 내구성 지수 (robustness index, RI) 및 비용지수 (cost index, CI)를 결합한 내구성-비용지수 (robustness cost index, RCI)를 제안하고, 이를 강남역 상습침수구역에 적용하여 기존 기반시설과 구조적 대안 (하수관거 확충, 저류조 설치, 옥상녹화)을 평가하였다. 그 결과, 2~20년 빈도의 강우강도범위에서 저류조와 옥상녹화설치가 상대적으로 높은 RCI 값을 나타내었고 두 대안 중 RCI가 보다 높은 대안은 강우강도에 따라 달라지는 경향을 보였다. 30년 빈도 강우강도에 대하여는 저류조와 옥상녹화를 병용 설치하는 대안이 가장 높은 RCI 값을 나타내어 가장 회복탄력적인 대안으로 확인되었다. 최종적으로 재해의 계획규모에 따른 현행 사회기반시설의 내구성 평가 및 최적의 구조적 대안 선택 절차를 수립하여, 도시홍수 문제에 대한 회복탄력적 사회기반시설 구축 전략을 제시하였다.

• Ecology and Resilient Infrastructure
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• 제8권4호
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• pp.281-289
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• 2021

상업에서 사용되는 일회용 컵은 환경으로 유입되어 파편화되어 미세플라스틱 (MP)이 될 수 있다. 또한 MP는 수생 생물에게 섭식 될 수 있으며, 다양한 부작용을 미칠 수 있다. 본 연구는 일회용 컵에서 유래된 MP 조각이 물벼룩에게 미치는 급성 및 만성 독성을 평가했다. MP 조각은 33.18 ±7.76 ㎛ 크기의 PET (Polyethylene terephthalate) MP 조각으로 확인되었으며, 3종류의 첨가제 (1- Propanone. 1-phenyl-3-[2-(phenylmethoxy)phenyl]-, p-Xylene and ethylbenzene)가 함유되어 있는 것을 확인하였다. 48시간 급성 독성은 최고 농도의 PET MP (200 mg L^-1)에 노출된 물벼룩에서 20%의 유영저해 및 사망을 발견하였다. 21일 만성 독성은 5 mg L-1의 PET MP 조각에 노출된 D. magna에서 대조군과 비교하여 줄어든 생존율 (31%)과 번식 (52%)을 보여주었다. 더욱이 PET MP는 태어난 개체의 발달 이상을 (3.5%) 대조군 (0.3%)과 비교하여 유의하게 (p < 0.05) 증가시켰다. 이러한 결과는 MP 조각의 섭취에 의한 장 막힘과 더 긴 체류 시간 때문일 수 있다. 본 연구의 결과는 일회용 컵 (PET 폴리머)이 작은 크기의 MP 조각으로 단편화되면 수생 생물에 심각한 생태학적 위험을 제기할 수 있음을 시사하고 있다. 또한 MP 독성 및 첨가제에 대한 근본적인 독성 메커니즘을 확인하기 위해 추가 연구가 수행되어야 한다.