Hardware 유역의 수문매개변수 보정을 위한 SWAT-CUP 프로그램의 적용성 평가

김상민,Sang Min, Kim 한국농공학회 2017 한국농공학회논문집 Vol.59 No.3

The purpose of this study was to calibrate the hydrologic parameters of SWAT model and analyze the daily runoff for the study watershed using SWAT-CUP. The Hardware watershed is located in Virginia, USA. The watershed area is $356.15km^2$, and the land use accounts for 73.4 % of forest and 23.2 % of pasture. Input data for the SWAT model were obtained from the digital elevation map, landuse map, soil map and others. Water flow data from 1990 to 1994 was used for calibration and from 1997 to 2005 was for validation. The SUFI-2 module of the SWAT-CUP program was used to calibrate the hydrologic parameters. The parameters were calibrated for the highly sensitive parameters presented in previous studies. The P-factor, R-factor, $R^2$, Nash-Sutcliffe efficiency (NS), and average flow were used for the goodness-of-fit measures. The applicability of the model was evaluated by sequentially increasing the number of applied parameters from 4 to 11. In this study, 10-parameter set was accepted for calibration in consideration of goodness-of-fit measures. For the calibration period, P-factor was 0.85, R-factor was 1.76, $R^2$ was 0.51 and NS was 0.49. The model was validated using the adjusted ranges of selected parameters. For the validation period, P-factor was 0.78, R-factor was 1.60, $R^2$ was 0.60 and NS was 0.57.

GIS 기반 농경지 침수모의시스템의 구축 및 적용

김상민,박종민,박승우,Kim , Sang-Min,Park , Chong-Min,Park , Seung-Woo 한국농공학회 2004 한국농공학회논문집 Vol.46 No.5

A GIS-based paddy inundation simulation system which is capable of simulating temporal and spatial inundation processes was established and applied in this paper. The system is composed of HEC-GeoHMS, and HEC-GeoRAS modules which interface the GIS and flood runoff models, and HEC-HMS, and HEC-RAS models which estimate the flood runoff. It was used to simulate storm runoff and inundation for a small rural watershed, the Baran HP#7, which is 10.69 $km^2$ in size. The simulated peak runoff, time to peak, and total direct runoff for eight storms were compared with the observed data. The results showed that the coefficient of determination ($R^2$) for the observed peak runoff was 0.99 and an error, RMSE, 11.862 $m^3$/s for calibration stages. In the model verification, $R^2$ was 0.99 and RMSE 1.296 $m^3$/s. Paddy inundation for each paddy growing stages in study watershed were estimated using verified inundation simulation system when probability rainfall was applied.

하모닉 직교 방식의 초음파 고조파 영상화 기법

김상민,송재희,송태경,Kim, Sang-Min,Song, Jae-Hee,Song, Tai-Kyong 대한의용생체공학회 2009 의공학회지 Vol.30 No.1

A harmonic quadrature demodulation method to extract the second harmonic component from focused ultrasound signals after a single transmit-receive event is proposed. In the proposed method, the focused ultrasound signal is converted into baseband inphase and quadrature components by multiplying with sine and cosine signals both having twice the center frequency of the transmitted signal and filtering the two modulated signals. The quadrature component is then passed through a Hilbert filter to be added to the inphase component, which leaves only the envelope of the second harmonic component. A novel phase estimation technique is employed in the proposed method to avoid the phase mismatch between the focused signal and the two modulating signals. The proposed method is verified through both theoretical analysis and computer simulations. It is shown that compared to the pulse inversion scheme the proposed method provides almost the same results for stationary targets and significantly improved harmonic to fundamental ratio for moving targets.

농업용 저수지에서의 환경용수 방류 능력 평가

김상민,김성재,김용완,박태양,김성민,박기욱,장민원,Kim, Sang-Min,Kim, Sung-Jae,Kim, Yong-Wan,Park, Tae-Yang,Kim, Sung-Min,Park, Ki-Wook,Jang, Min-Won 한국농공학회 2011 한국농공학회논문집 Vol.53 No.6

The purpose of this study was to establish the methodology for providing the environmental flows from irrigation reservoir. Reservoir water budget for study area was analyzed to simulate the water supply scenarios for environmental flows. Bonghyun and Hi reservoirs area, located in Gyeongnam, Gosung-gun, Hi-myeon, were selected for study watersheds and streams for this study. Reservoir operation was simulated to determine the envionmental flows supply amount from March to October with the constraint that environmental flow supply was restrained when the storage of reservoir were below the half or one-third of effective storage. The simulated results indicated that the supply of environmental flows with the amount of 200 ton/day and 600 ton/day resulted in up to 15 mm and 29 mm of runoff depth increase in the downstream, respectively. The effect of environmental flows supply from existing irrigation reservoir was not significant because the irrigation reservoir was not designed to supply the environmental flows. It is necessary to remodel the irrigation reservoir and develop the reservoir operation technique, to meet the need for the environmental flows.

시뮬레이션 기법을 적용한 군용 항공기 소요 산정 모형

김상민,이문걸,Kim, Sang-Min,Lee, Moon-Gul 한국시뮬레이션학회 2014 한국시뮬레이션학회 논문지 Vol.23 No.4

군에서 향후 미래 위협에 대비한 군용 항공기의 적정 소요를 분석하는 일은 중요하다. 이전의 연구들은 작전 임무수행 측면과 전력지수의 비교를 통하여 적정 소요를 분석하였다. 이 방법들은 단편적인 항공기의 전투-효과 지수와 수량 측면에서의 비교만을 실시하였다. 그러나 본 연구에서는 시스템 다이내믹스를 통한 군용 항공기의 실제 운용 시나리오에 기반한 시뮬레이션 분석을 실시한다. 군용 항공기 운용 개념의 특성을 반영하여 하부 주요 시스템의 고장률과 수리율, 전 평시 차별적으로 발생하는 피격률을 통해 적정 소요량을 산출한다. It is very important to evaluate proper acquisition of military aircraft against future threats in our military defense field. In previous studies, the evaluation has been determined in terms of tasking order or weapon power index. These methods compare the combat-effectiveness index and the number of aircraft. However, this study provides simulation analysis of proper quantity decision based on actual operational senarios of military aircraft using System Dynamics. The method reflects the properties of military aircraft operation concepts and considers the rate of failure of main systems on subsystems, as well as repair and crash rates caused by differentials in peacetime and wartime frame.

소아 골절의 한약 치료에 대한 최신 중의학 임상 연구 동향 -대조군 연구 논문을 중심으로-

김상민,이진용,이선행,Kim, Sang Min,Lee, Jin Yong,Lee, Sun Haeng 대한한방소아과학회 2018 대한한방소아과학회지 Vol.32 No.1

Objectives The purpose of this study is to analyze the clinical research literature of TCM (traditional Chinese medicine) which is applicable to pediatric fracture and to broaden the field about clinical application of Korean medicine treatment for pediatric fracture. Methods We searched randomized controlled trials about TCM treatment of pediatric fracture from the CNKI (China National Knowledge Infrastructure) January 2013 to December 2017. We searched the literature and analyzed the treatment methods and the results. Results 31 papers were selected from 63 studies. In most studies, the total effective rate of the treatment group was significantly higher than that of the control group, and the bone healing time of the treatment group was significantly lower than that of the control group. Methods of herb treatment include internal medicine (IM), fumigation (FG) and external application (EA). The most commonly used herb medicine were Angelicae Gigantis Radix (當歸), Carthami Flos (紅花), Drynaria Fortunei (骨碎補), Paeonia Lactiflora Pallas (芍藥), Persicae Semen (桃仁), Lycopodii Herba (伸筋草), Ligusticum Chuanxiong Hort (川芎), Olibanum (乳香), Salviae Miltiorrhizae Radix (丹蔘), and Panax Noto Ginseng (三七). Conclusions The use of herb medicine in pediatric fractures has resulted in faster and more effective restoration of fracture union than the Western medical therapy alone. Based on the results of this study, it is possible to widen the scope of Korean medicine if additional clinical studies on pediatric fracture were conducted.

국립공원내 홍수피해 저감을 위한 미계측 산림지역의 설계홍수량 추정

김상민,임상준,이상호,김형호,마호섭,정원옥,Kim, Sang-Min,Im, Sang-Jun,Lee, Sang-Ho,Kim, Hyung-Ho,Ma, Ho-Seop,Jeong, Won-Ok 한국농공학회 2009 한국농공학회논문집 Vol.51 No.5

The purpose of this study is to estimate the design flood runoff for ungaged forest watershed to reduce the flood damage in national park. Daewonsa watershed in Jirisan National Park was selected as study watershed, of which characteristic factors were obtained from GIS data. Flood runoff was simulated using SCS unit hydrograph module in HEC-HMS model. SCS Curve Number (CN) was calculated from forest type area weighted average method. Huff's time distribution of second-quartile storm of the Sancheong weather station, which is nearest from study watershed, was used for design flood runoff estimation. Critical storm duration for the study watershed was 3 hrs. Based on the critical duration, the peak runoff for each sub-watershed were simulated. It is recommended to monitor the long-term flow data for major stream stations in National Park for a better reliable peak runoff simulation results.

오염총량관리를 위한 남강댐유역 BOD 자료의 공간특성 분석

김상민,김성민,박태양,Kim, Sang-Min,Kim, Sung-Min,Park, Tae-Yang 한국농공학회 2010 한국농공학회논문집 Vol.52 No.3

The purpose of this study is to analyze the spatial characteristics of Namgang-Dam watershed for a Total Maximum Daily Loads (TMDL). Three TMDL target sites, Gyeonghogang1, 2, Namgang-Dam2, are located within Namgang-Dam watershed. Under the current criterion for TMDLs, 3-year arithmetic mean BOD concentration of the target sites should not exceed the target concentration for 2 consecutive years. Two and three times of violation were observed for Gyenghogang2 and Namgang-Dam2 sites while no violation was found for Gyeonghogang1 site. However, no violation was found since 1999 for all three sites. Correlation between each 12 stations within the watershed were analyzed and cluster analysis was conducted to figure out the spatial characteristics of the watershed. Correlation coefficient between Gyonghogang1 and 2 was high (0.758) while the coefficients between lake station (Namgang-Dam2) and stream stations (Gyonghogang1 and 2) were very low. Dendrogram indicated that all of three Namgang-Dam stations were very close and Gyenghogang1, 2 stations were also close.

F. Gerald Ham Selecting and Appraising Archivies and Manuscripts (Chicago : The Society of American Archivists, 1993)

김상민,Kim, Sang-Min 한국기록학회 2002 기록학연구 Vol.0 No.5

HSPEXP 모형평가지표 이용한 HSPF 모형의 수문매개변수 보정

김상민,성충현,박승우,Kim, Sang-Min,Seong, Choung-Hyun,Park, Seung-Woo 한국농공학회 2009 한국농공학회논문집 Vol.51 No.4

The purpose of this study was to test the applicability of the HSPEXP model performance criteria for calibrating hydrologic parameters of HSPF. Baran watershed, located at Whasung city, was selected as a study watershed in this study. Input data for the HSPF model were obtained from the digital elevation map, landuse map, soil map and others. Water flow data from 1996 to 2000 was used for calibration and from 2002 to 2007 was for validation. Using the HSPEXP decision-support software, hydrology parameters were adjusted based on total volume, then low flows, storm flows, and finally seasonal flows. Suggested criteria for each model performance variables were referenced from the previous research. For the calibration period, all the HSPEXP model performance criteria were satisfied while two criteria were slightly violated for the validation period.