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황룡강 유역의 TOC 부하량 예측을 위한 SWAT-C 모형의 적용 및 평가
김동호(Dongho Kim),이지원(Jlwon Lee),정혜민(Hyemin Jeong),권용성(Yongsung Kwon),이병원(Byeongwon Lee),이상철(Sangchul Lee) 대한환경공학회 2022 대한환경공학회지 Vol.44 No.10
목적 : 본 연구는 국내 유역 수계 내 총유기탄소를 예측하기 위해 최근 개발된 SWAT-C 수질모형의 적용 가능성을 평가하는 것을 목적으로 한다. 방법 : SWAT-C 모형은 황룡강 유역을 대상으로 진행하였다. SWAT-C는 유역 규모에서 탄소 순환을 모의하는 SWAT 모형의 고도화된 버전이다. SWAT-C 모형은 안정화 기간 2년(2010-2011), 보정 6년(2012-2017), 검정 3년(2018-2020) 기간으로 구성된 총 11년(2010-2020)동안 모의하였다. SWAT-C는 월별 유량 및 TOC 부하량에 대해 검보정 되었다. 모델 성능은 NSE(Nash-Sutcliffe Efficiency), KGE(Kling-Gupta Efficiency), PBIAS(Percent bias)를 이용하여 평가하였다. TOC로 보정된 모델에서 예측된 월별 DOC 및 POC 부하량을 분석하여 유출되는 주요 탄소형태를 평가하였다. 결과 및 토의 : 보정 결과는 SWAT-C 모형의 모델성능 (NSE > 0.5, KGE > 0.5, PBIAS =< 25%)으로 유량 및 TOC 부하를 나타낼 수 있음을 보여주었다. 특히, TOC 부하의 계절적 변화는 SWAT-C 모형에 의해 잘 모의되었다. TOC 부하는 강수량이 많은 여름철에 증가하며 그 외 계절은 다소 낮게 예측되었다. 이 계절적 패턴은 여름철에 빈번한 강우 현상으로 인한 것으로 판단된다. 결론 : 본 연구는 SWAT-C 모형이 충분한 예측 정확도로 국내에 적용 가능하다는 것을 입증하였다. 그러므로, SWATC는 국내의 TOC 부하를 모니터링하는 효율적인 도구의 역할을 할 것으로 사료된다. Objectives : This study aims to assess the applicability of the SWAT-C water quality model recently developed to predict in-stream Total Organic Carbon (TOC) in a watershed within South Korea. Methods : The SWAT-C model was tested in the Hwangryong River Watershed. SWAT-C is an advanced version of Soil and Water Assessment Tool (SWAT) to simulate carbon cycling at the watershed scale. The model was simulated for 11 years (2010-2020) consisting of 2-year warm-up (2010-2011), 6-year calibration (2012-2017), and 3-year validation (2018-2020) periods. SWAT-C was calibrated and validated against monthly streamflow and TOC loads. The model performance was evaluated using NSE (Nash-Sutcliffe efficiency), KGE (Kling-Gupta efficiency), and PBIAS (percent bias) Simulated Dissolve Organic Carbon (DOC) and Particulate Organic Carbon (POC) loads were also presented to see the major caron type loaded to the downstream. Results and Discussion : The calibration results showed that SWAT-C could depict streamflow and TOC loads with acceptance model performances (NSE > 0.5, KGE > 0.5 and PBIAS =< 25%). Especially, the seasonal variations of TOC loads were well simulated by SWAT-C. The TOC load was predicted to increase in the summer season with high precipitation and slightly lower in the other seasons. This seasonal pattern is likely caused by frequent heavy rainfall events in summer. Conclusion : This study demonstrated that SWAT-C model is applicable in South Korea with sufficient prediction accuracy. Thus, SWAT-C would serve as an efficient tool to monitor TOC loads in South Korea.
2007 개정 및 2009 개정 교육과정의 분수의 덧셈과 뺄셈에 관한 초등학교 수학과 교과용 도서 분석
염명선 ( Yeom Myeongseon ),윤장호 ( Yoon Jangho ),정혜민 ( Jeong Hyemin ),방정숙 ( Pang Jeongsuk ) 한국교원대학교 초등교육연구소 2017 초등교과교육연구 Vol.27 No.-
This paper analyzed the instructional materials developed under the 2007 revised and 2009 revised curriculum regarding the addition and subtraction of fractions in various aspects. Firstly, we examined the connection between the curriculum and its concomitant textbooks, followed by the appropriateness of learning sequences and topics. We then analyzed in detail the textbooks and workbooks according to the main instructional flow: introduction, activity, and exercise. Regarding the introduction, we analyzed the meanings of fractions and operations in word problems. Regarding the activity, we examined the diversity and appropriateness of visual models, and explored how the algorithms of the addition and subtraction of fractions were drawn from the activity. Finally, regarding the exercise, we analyzed the types of problems in the textbooks and workbooks, and the types of responses required to students. As such, this paper is expected to provide suggestions for the development of textbooks and workbooks of the 2015 revised curriculum.
맹순주 ( Maeng Soonju ),장지홍 ( Jang Jihong ),남주령 ( Nam Juryeong ),박은경 ( Park Eunkyung ),황선영 ( Hwang Sunyoung ),정혜민 ( Jeong Hyemin ) 국군간호사관학교 군건강정책연구소 2021 군진간호연구 Vol.39 No.3
Purpose: This study aimed to analyze tasks and duties of nurse assistants of inpatient and outpatient department in the ROK military hospitals. Methods: Prototype of job analysis was developed based on literature review, and 27 nurse assistants working at military hospitals participated in evaluation of the importance and performance on the prototype. Final product of job analysis was developed through evaluation of the importance and content validity of prototype by experts of 8 military hospital nurse managers. Results: Job of nurse assistants in ROK military hospitals was composed of 7 duties (supporting medical professionals in/outpatient, supporting oriental medicine doctors, supporting RNs, performing household duties, continuing education, and performing military specific tasks), 24 tasks, and 95 task elements. Conclusion: The study conducted the job analysis of nurse assistants in ROK military hospitals. It could be utilized to the standardization of the job description of nurse assistants in military hospitals.