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익산 밭경지 특성을 고려한 초생대 유출 및 유사 저감효과 모의
이슬기,장정렬,최경숙,Lee, Seul Gi,Jang, Jeong Ryeol,Choi, Kyung Sook 한국농공학회 2014 한국농공학회논문집 Vol.56 No.5
The goal of this study was to evaluate sediment reduction effects of VFS (vegetative filter strip) applied for Iksan area in Saemangeum watershed. This study simulated runoff and sediment load from different types of uplands using VFSMOD-W. The general upland characteristics of the study area was investigated to build reasonable scenarios of the simulation. The simulation scenarios were designed by various areas, shapes, and slopes of uplands. Grass mixture was selected as VFS vegetation and the size of VFS was fixed as 10 % of uplands area. Additionally 50mm, 100mm, 150mm of daily rainfall were applied for the runoff and sediment simulation. As results, the calculated runoff and sediment loads were obtained $20.7{\sim}1,030.6m^3$ and 568.4~675,731.4 kg for the range of 0.1~1.0 ha of uplands with 7 % and 15 % slopes. The reduction effects on runoff and sediment were obtained 5~10 % and 21.0~47.7 % respectively from VFS applications. The VFSMOD-W simulations showed that runoff tended to increase as upland area and amount of rainfall increased while sediment increased when slope, length and area of uplands and amount of rainfall increased. These results indicated that rainfall amount and upland size are the critical factors for the generation of runoff and sediment load. In order to support this conclusion, further studies such as, long term monitoring, field experiments, and to calibrate and evaluate the model are necessary.
밭 비점오염저감을 위한 잔디초생대 적용 비용 및 활용성 평가
이슬기,장정렬,최경숙,Lee, Seul-Gi,Jang, Jeong-Ryeol,Choi, Kyung-Sook 한국농공학회 2015 한국농공학회논문집 Vol.57 No.2
This study was aimed to estimate the total application cost and utilization of Turf grass VFS application through the field experiment. The experimental plots were constructed in an upland field of Iksan city within the Saemangeum watershed. Turf grass was transplanted at the down-slope edge of the pollution source area in each of the treated plots. Three rainfall events were monitored during the experiment period, and the rainfall-runoff relationships and NPS pollution reduction effects of the VFS systems were assessed. As results, the reduction ratio of runoff volume ranged 14.1~64.0 %, while the NPS pollution reduction ratio ranged 9.8~73.9 % for SS, 24.0~84.2 % for T-N, 31.6~80.9 % for T-P respectively. The total cost of VFS application was estimated by considering purchase cost of Turf grass sods and construction and maintenance costs of VFS system as well as the loss caused by giving up crop cultivation for the area needed to construct the VFS. The total cost of the VFS was estimated to be approximately \3,379,000/ha/year for the first year of application, and this cost could be decreased to \1,899,000/ha/year from the second year as the construction cost of VFS could no longer need to be counted afterwards. Apart from the NPS pollution reduction effects, the possible utilization of VFS was examined by detaching Turf grass within 40 % of VFS area for sale during spring time when the VFS systems fully covered. The benefit of selling the detached Turf grass sods was estimated as \1,260,000/ha/year, and also found that the VFS area successfully recovered by the time of the summer period. This benefit could attract farmers to adopt the VFS technique to manage agricultural NPS pollution.
이슬기,장정렬,최경숙,Lee, Seul Gi,Jang, Jeong Ryeol,Choi, Kyung Sook 한국수자원학회 2018 한국수자원학회논문집 Vol.51 No.6
본 연구에서는 VFSMOD-W 모형을 활용하여 새만금 유역의 초생대 기법 적용에 따른 유사저감효과를 예측하고자 하였다. 먼저 모형의 신뢰도 확보를 위해 새만금 유역 내 초생대 실측치를 활용하여 매개변수를 보정하였으며, 새만금 유역 내 밭경지 특성을 파악하여 이를 토대로 모의 시나리오를 개발하였다. 다양한 밭경지 특성을 반영하기 위해 개발된 모의시나리오는 밭경지 규모 1 ha, 5 ha, 10 ha로 밭의 폭과 길이 비는 1 : 1를 적용하였으며, 밭의 경사는 7%, 15%를 고려하였다. 또한 강우조건은 50 mm, 100 mm, 150 mm, 200 mm 일강우량을 적용하였다. 그 결과, 초생대의 유출저감효과는 밭경사 7%와 15%에 대해 2.9~13.5%, 2.9~12.1%로 각각 나타났으며, 유사저감효과는 33.8~97.0%, 27.1~85.9%로 각각 나타나 유출저감효과에 비해 상대적으로 높은 저감효과를 나타내었다. 유출 및 유사 발생에 영향을 미치는 밭규모, 경사 및 강우량 인자에 따라 초생대 효과는 큰 차이를 나타내었다. 본 모의 결과를 바탕으로 새만금 유역내 밭경지 규모 10 ha 미만, 경사 15% 이내의 조건에서 밭면적 10% 규모로 초생대를 조성할 경우 유사저감 효과를 기대할 수 있을 것으로 사료된다. The study was intended to simulate the sediment reduction effects of the Vegetative Filter Strip (VFS) in uplands of Saemangeum watershed through VFSMOD-W model application. The model was calibrated by using the field data and the simulation scenarios were designed based on the investigation of uplands characteristics in Saemangeum watershed. The simulation scenarios were considered various size and slope of uplands including 1 ha, 5 ha, 10 ha of field size with width-length ratio of 1 : 1 having 7% and 15% of slopes under the daily rainfall of 50 mm, 100 mm, 150 mm, and 200 mm in order to mimic the different fields conditions. The effluent reduction ranged from 2.9~13.5% and 2.9~12.1% for runoff, and 33.8~97.0% and 27.1~85.9% for sediment under the field's slope of 7% and 15%, respectively. The VFS reduction effects showed different degree of influence from field size, slope, rainfall amounts. Based on the simulated results, the sediment contributing non-point source pollution expected to be reduced in the condition of VFS constructed 10% of fields in outlet of less than 10 ha of uplands having less than 15% of the slope.
이슬기,장정선,정성관,유주한,Lee, Seul-Gi,Jang, Jung-Sun,Jung, Sung-Gwan,You, Ju-Han 한국조경학회 2009 韓國造景學會誌 Vol.37 No.3
학교숲은 도시숲의 유형중 하나이다. 도시학교는 적당한 거리에 적당한 면적을 유지하고 있어 학교숲의 조성은 도시에 많은 숲이 조성되는 효과를 준다. 또한, 학교는 학생들이 오랜 시간 머무르는 장소로 학생들의 환경교육의 장으로써의 역할을 수행할 수 있다. 그러나 현재 조성된 학교숲은 학생들의 요구나 참여가 배제된 채 결과 중심의 사업이 되고 있어 학생들의 환경교육에 큰 영향을 미치고 있지 못한 실정이다. 또한 설문조사를 바탕으로 분석하는 기존연구의 경우, 리커트척도를 활용하여 주관적 판단인 정성적 자료를 정량화 하였다는데 의의가 있으나, 인간의 주관적 판단은 모호한 경우가 많아 일반적으로 정량화하는데 문제가 있다. 이에 본 연구에서는 경상북도에 위치한 초등학교 학생들을 대상으로 학교숲에 대한 객관적인 만족도 평가를 위해 퍼지이론을 활용하여, 학교숲 만족도에 미치는 항목들을 알아보고자 하였다. 연구 결과, '학교 특색'과 '정서 함양' 항목의 산술평균값의 순위와 퍼지이론을 도입한 무게중심값의 순위가 변화됨을 알 수 있었다. 이는 퍼지이론이 인간의 사고와 같은 정성적 자료를 합리적으로 객관화 할 수 있다는 증거가 된다. 또한 학교숲 전체 만족도에 영향을 주는 요인은 '학교 특색' 항목의 회귀계수값이 0.159로 가장 높았으며, 다음으로 '수량 많음(0.142)', '자연 소중(0.136)', '정서 함양(0.120)'순으로 나타났다. 이 연구는 설문의 객관적 분석방법과 학교숲 조성을 위한 기초자료로 활용이 가능하리라 판단된다. Wooded areas that are a part of school campuses are one type of urban forest. Most schools located in an urban environment make an excellent setting for a forest in terms of location and area. These kinds of wooded spaces also make the city greener and healthier. As a place where students spend a great deal of time, schools can also be a venue for environmental education. The creation of wooded areas in schools currently has focused on the end result only; by ignoring student needs and participation, these areas have not had a significant influence on student environmental education. Previous studies based on questionnaire survey are significant in that they have quantified subjective qualitative data via Likert Scale. There has been, however, a problem in quantifying the more ambiguous subjective data. Therefore, this paper has attempted to investigate those factors that have an influence on student satisfaction with the wooded areas of their school campus using Fuzzy Theory with elementary school students in Gyeongsangbuk-do. A change was observed in terms of the ranking of arithmetic mean values of 'school peculiarity' and 'emotion evolution' and center of gravity, which has adopted Fuzzy Theory, proving that Fuzzy Theory could rationally objectify qualitative data such as human thoughts. In terms of the influential factors on the satisfaction with school forests(regression coefficient), 'school uniqueness(0.159)' was the highest, followed by 'many trees(0.142),' 'importance of nature(0.136)' and 'emotion evolution(0.130).' This paper may therefore be useful as basic data for objective questionnaire surveys and the development of school forests.
대학생의 자기자비가 폭식행동에 미치는 영향: 부정정서와 부정 긴급성의 매개효과
이슬기(Seul-Gi Lee),이희경(Hee-Kyung Lee) 한국콘텐츠학회 2022 한국콘텐츠학회논문지 Vol.22 No.9
본 연구는 자기자비와 폭식행동의 관계를 확인하고, 자기자비가 폭식행동에 미치는 영향이 부정정서와 부정 긴급성에 의해 매개되는지를 살펴보았다. 이를 검증하기 위해 대학생 및 대학원생 441명을 대상으로 자기자비, 부정정서, 부정 긴급성, 폭식행동을 측정하는 설문을 실시하였다. 수집한 자료는 SPSS 23.0과 AMOS 23.0 프로그램을 통해 기술통계분석 및 Pearson 상관분석, 구조방정식 모형 검증을 통해 분석되었으며, 부트스트래핑(Bootstrapping) 방법을 사용하여 간접효과의 유의성을 검증하였다. 본 연구의 결과를 요약하면 다음과 같다. 첫째, 상관분석 결과 자기자비, 부정정서, 부정 긴급성, 폭식행동 간 유의한 상관이 나타났다. 둘째, 자기자비와 폭식행동의 관계에서 부정정서와 부정 긴급성의 순차적 매개효과가 나타났다. 이는 대학생의 자기자비증진이 부정정서와 부정 긴급성을 순차적으로 감소시킴으로써 폭식행동을 감소시킬 수 있음을 의미한다. 마지막으로 이러한 결과를 토대로 폭식행동의 치료에 있어 자기자비의 실제적 활용방안에 대해 제안하였다. The purpose of this study is to examine the relationship between self-compassion and binge eating and to examine the mediating effects of negative affect and negative urgency. To validify this hypothesis, 441 college and graduate students were measured self-compassion, negative affect, negative urgency, and binge eating. For the collected data, SPSS(23.0) and AMOS(23.0) were used for descriptive statistics, correlation analysis, and analyzing the structural equation model. The results of this study are summarized as follows. First, the correlation analysis showed significant correlations among self-compassion, negative affect, negative urgency, and binge eating. Second, in the relationship between self-compassion and binge eating, negative affect and negative urgency showed serial mediating effects. This means that for college and graduate students, the promotion of self-compassion can reduce binge eating behavior by sequentially reducing negative emotions and negative urgency. Finally based on these results, practical applications of self-compassion in the treatment of binge eating behavior were proposed.