SWAT을 이용한 극한 기후변화 시나리오와 유역간 물이동 변화를 고려한 만경강 유역의 미래 수문 및 수질 평가

우소영,이지완,김용원,김성준 한국수자원학회 2020 한국수자원학회논문집 Vol.53 No.8

본 연구에서는 만경강유역(1,602 km2)을 대상으로 SWAT(Soil and Water Assessment Tool)을 이용하여 미래 극한 기후변화 시나리오와 유역간 물이동 감소에 따른 유역의 수문 수질 변화를 미래기간(S1: 2010~2039, S2: 2040~2069, S3: 2070~2099)로 구분하여 평가하였다. 이를 위해 유역간 물이동량, 유역내 취수량, 점 오염원 등을 고려하여 SWAT 모형을 구축 후 수위 관측소 2지점(대천, 전주), 수질 관측소 2지점(삼례, 김제)에 대하여 유출량과 부하량을 보정(2012~2014년) 및 검증(2016~2018년)하였다. 검보정 결과 유출량의 평균 R2는 0.7, NSE는 0.51이었으며, SS, T-N, T-P의 평균 R2는 0.72, 0.80, 0.72로 분석되었다. 미래 기후변화에 따른 연평균 유출량은 최대 459 mm/yr 증가하였으며, 연평균 SS, T-N, T-P 부하량은 각각 최대 19,548 ton/yr, 68,748 kg/yr, 13,728 kg/yr 증가하였다. 미래 유역간 물 이동량이 감소하였을 때, 봄과 겨울에 유출량이 감소하였으며, 미래 수질 부하량은 강수량의 영향으로 과거 관측 기간보다 증가하였다. 유출량 감소와 부하량 증가로 인한 수질 악화를 개선하기 위해서는 유역간 물이동이 일정 수준으로 지속되어야 할 것으로 판단된다. The purpose of this study is to assess the future hydrological and water quality change of Man-gyeong river basin (1,602 km2) based on future extreme climate change scenarios and reduction of inter-basin water transfer amount using SWAT (Soil and Water Assessment Tool). The SWAT was calibrated (2012~2014) and validated (2016~2018) at 2 water level observation stations (DC, JJ) and 2 water quality observation stations (SR, GJ) considering inter-basin water transfer amount, stream water withdrawal, and point source data. For the streamflow, the coefficient of determination (R2) was 0.70 and the average Nash-Sutcliffe efficiency (NSE) was 0.51 respectively. For the water quality of SS, T-N, and T-P, the R2 was 0.72, 0.80 and 0.72 respectively. The future average streamflow under climate change scenarios increased up to 459 mm/yr, and average SS, T-N and T-P yields also increased up to 19,548 ton/yr, 68,748 kg/yr, and 13,728 kg/yr respectively. When the amount of inter basin water transfer decreased, the streamflow especially decreased in spring and winter periods, and the future water quality yields increased under the influence of precipitation. In order to solve the deterioration of water quality due to decrease in the flow rate and an increase in the load, the amount of inter basin water transfer should be maintained to a certain level.

하천유지유량 추가 댐방류에 따른 한강유역의 수질 및 수생태계 건강성 변화 평가

우소영,김성준,황순진,정충길 한국수자원학회 2019 한국수자원학회논문집 Vol.52 No.S-2

본 연구에서는 SWAT (Soil and Water Assessment Tool)을 이용하여 한강유역 (34,148 km2)내 다목적 댐(소양강댐, 횡성댐, 충주댐)의 하천유지유량 추가 방류 모의를 통한 유역의 수질 및 수생태계 건강성 변화를 평가하였다. 추가 방류기간은 수생태계 건강성 조사가 수행되는 봄(4-6월), 가을(8-10월)로 산정하였으며, 방류량은 댐의 기존 방류량에 비례하며 총 방류량이 댐별 고시된 하천유지유량을 초과하지 않도록 산정하였다. 하천유지유량 방류에 따른 수질(T-N, NH4, NO3-N, T-P, PO4-P) 농도는 봄철에 감소하지만 가을철에는 오히려 증가하는 것으로 모의되었다. 변화한 수질농도 데이터를 기존에 구축한 Random Forest 알고리즘에 적용하여 수생태계 건강성을 평가하였을 때, 유역의 하류에서 모든 수생태계 건강성 지수(FAI, TDI, BMI) 등급이 개선되는 것으로 분석되었다. 가을보다 봄에 하천유지유량 방류에 따른 수생태계 개선의 효과가 큰 것으로 나타났다. The purpose of this study is to evaluate changes in water quality and aquatic ecosystem health by additional dam release of stream maintenance flow from multipurpose dams in Han river basin (34,148 km2) using SWAT (Soil and Water Assessment Tool). The period of additional release was spring (April to June) and autumn (August to October) to evaluate the changes with the data of aquatic ecosystem health survey. The amount of additional release was set proportional to the present dam release, and the maximum release amount was controlled not to exceed the officially notified stream maintenance flow from dam. The 10 percent to 50 percent additional releases showed that the stream water quality (T-N, NH4, T-P, and PO4-P) concentrations except NO3-N decreased in spring while increased in autumn period. Using the stream water quality results and applying with Random Forest algorithm, the grade of aquatic ecosystem health index (FAI, TDI, and BMI) was improved for both periods especially in the downstream of basin. This study showed that the additional release of stream maintenance flow was more effective in spring than autumn period for the improvement of water quality and aquatic ecosystem.

포스타 : 일반 부인과학 ; 자궁내막증과 자궁선근종 조직의 월경주기에 따른 세포고사(apoptosis) 발현의 비교

우소영,이지영,문종수,서수형,박양서 대한산부인과학회 1999 대한산부인과학회 학술대회 Vol.84 No.-

Natural Occurrence of Aflatoxigenic Aspergillus Species and Aflatoxins in Traditional Korean Fermentation Starters, Meju and Nuruk

우소영,이상유,Fei Tian,정아영,유차니,Seungyoon Kang,전향숙 한국식품위생안전성학회 2020 한국식품위생안전성학회지 Vol.35 No.5

Meju and nuruk (respectively soybean and malt) are traditional Korean fermentation starters that are vulnerable to contamination by harmful microorganisms such as aflatoxigenic fungi and their associated aflatoxins (AFs). In this study, Aspergillus spp. were isolated and identified from a total of 57 meju and 18 nuruk samples collected from Korean markets. Their potential aflatoxigenicity was investigated by examining the presence of three aflatoxin biosynthetic genes (aflO, aflP, and aflR) using multiplex polymerase chain reaction (mPCR) assays. Thereafter, aflatoxin production of isolates and the natural occurrence of AFs in meju and nuruk samples were analyzed by high-performance liquid chromatography (HPLC). A total of 177 Aspergillus isolates were identified and 130 isolates were obtained from meju samples. Of these, 25 isolates (19.2%) contained all three aflatoxin biosynthetic genes, and five (20%) of these isolates produced aflatoxins. Forty-seven of the Aspergillus isolates were obtained from nuruk samples, five of which (10.6%) expressed all three AF biosynthetic genes; however, none of these strains produced AFs. HPLC analysis showed that 88% (51/58) of the meju samples and 39% (7/18) of nuruk samples were not contaminated with AFs (below limit of detection). Among the isolates isolated from meju and nuruk, there were aflatoxigenic strains containing all three aflatoxin biosynthetic genes or producing aflatoxin in medium, but the frequency of aflatoxin contamination was low in the meju and nuruk samples.

SWAT 및 random forest를 이용한 기후변화에 따른 한강유역의 수생태계 건강성 지수 영향 평가

우소영,정충길,김진욱,김성준 한국수자원학회 2018 한국수자원학회논문집 Vol.51 No.10

The purpose of this study is to evaluate the future climate change impact on stream aquatic ecology health of Han River watershed (34,148 km2) using SWAT (Soil and Water Assessment Tool) and random forest. The 8 years (2008~2015) spring (April to June) Aquatic ecology Health Indices (AHI) such as Trophic Diatom Index (TDI), Benthic Macroinvertebrate Index (BMI) and Fish Assessment Index (FAI) scored (0~100) and graded (A~E) by NIER (National Institute of Environmental Research) were used. The 8 years NIER indices with the water quality (T-N, NH4, NO3, T-P, PO4) showed that the deviation of AHI score is large when the concentration of water quality is low, and AHI score had negative correlation when the concentration is high. By using random forest, one of the Machine Learning techniques for classification analysis, the classification results for the 3 indices grade showed that all of precision, recall, and f1-score were above 0.81. The future SWAT hydrology and water quality results under HadGEM3-RA RCP 4.5 and 8.5 scenarios of Korea Meteorological Administration (KMA) showed that the future nitrogen-related water quality in watershed average increased up to 43.2% by the baseflow increase effect and the phosphorus-related water quality decreased up to 18.9% by the surface runoff decrease effect. The future FAI and BMI showed a little better Index grade while the future TDI showed a little worse index grade. We can infer that the future TDI is more sensitive to nitrogen-related water quality and the future FAI and BMI are responded to phosphorus-related water quality. 본 연구에서는 SWAT 모형과 random forest를 이용하여 미래 기후변화에 따른 한강유역(34,148 km2)의 수생태계 건강성을 평가하였다. 국립환경과학원에서 8년간(2008~2015년) 봄철(4~6월)에 모니터링한 부착돌말류 지수(TDI), 저서형 대형무척추동물지수(BMI), 어류평가지수(FAI)는 0~100점, A~E등급으로 평가되며, 이를 본 연구에서 사용하였다. 수생태 건강성에 영향을 미치는 변수로는 수질(T-N, NH4, NO3, T-P, PO4)과 수온을 선정하였으며, 수질 오염도가 낮은 경우에는 수생태계 건강성 점수가 광범위하게 분포되지만 수질 오염도가 높은 경우 수생태계 건강성 점수가 낮아지는 역상관관계를 확인하였다. 기계학습의 분류 분석 기법 중 하나인 random forest 모델을 이용한 세 개의 수생태 건강성 지수 등급 분류 결과 정밀도, 재현율, f1-score 모두 0.81 이상의 예측 정확도를 나타내었다. 기상청의 HadGEM3-RA RCP 4.5와 8.5 시나리오를 적용한 미래 SWAT 수문, 수질 결과 기저유출의 증가로 인해 질소 계열 수질 농도는 기준년도 대비 최대 43.2% 증가하였고, 지표유출 감소로 인해 인 계열 수질 오염도는 최대 18.9% 감소하는 것으로 분석되었다. 미래 FAI, BMI의 등급은 개선되는 경향을 보이지만 TDI는 등급이 악화되는 것으로 나타났다. 이를 통해 TDI는 질소 계열 수질에 민감하고 FAI, BMI는 인 계열 수질에 더 민감하다고 판단하였다.

Simple chromatographic determination of aflatoxins in Korean fermented soybean products doenjang, ganjang, and gochujang, with comparison of derivatization methods

우소영,옥현애,이상유,정아영,정태균,전향숙 한국식품과학회 2022 Food Science and Biotechnology Vol.31 No.4

Korean fermented soybean products doenjang, ganjang, and gochujang are vulnerable to contamination with aflatoxigenic fungi in the open fermentation envi- ronment. Therefore, simple and effective methods to determine aflatoxins (AFs) in these complex food matrices are needed. High-performance liquid chromatography with fluorescence detection using two derivatization methods for AF determination in three fermented soybean products was optimized and validated. Pre-column derivatization (preCD) of the AF extracts was performed using trifluo- roacetic acid, and post-column derivatization (PCD) was performed in a photochemical reactor for enhanced detection. Both derivatization methods resulted in accept- able performances for linearity (R2 [ 0.999), recovery (71–118%), and precision (\ 10.6%) values. Recovery and precision with preCD and PCD were similar, but the limit of detection was superior with PCD. When these analytical methods were applied to commercially available fermentedsoybean products, the AF levels of all commercial products were ranged from not detected to 6.06 lg/kg.

도시화 및 기후변화에 의한 안성천 유역의 지하수 함양량 변화 분석

우소영,김원진,장선우,최시중,김철겸 대한토목학회 2024 대한토목학회논문집 Vol.44 No.4

본 연구는 서해안에 인접한 안성천 유역(1,647 km2)을 대상으로 수문모델 SWAT을 이용하여 도시화 및 미래 기후변화에 의한 지하수 함양량의 변화를 분석하였다. 도시화 시나리오는 도시 밀도의 증가와 도시의 확장을 이용하여 구축하였으며, 그 결과 도시화로 인해 지하수 함양량 및함양률이 각각 19.9 mm, 1.77 % 감소하는 것으로 분석되었다. 미래 기후변화 시나리오는 극한 강우 및 극한 가뭄을 대표하는 두 개의 모델을 이용하여 모의하였으며, 극한 가뭄 모델에서는 평균 함양률이 21.6 %를 유지하기 어려울 것으로 분석되었다. 도시화와 극한 가뭄이 동시에 발생하는 복합시나리오의 결과, 도시지역의 봄철 지하수 함양량이 가장 큰 영향을 받을 것으로 전망되었다. This study analyzed changes in groundwater recharge due to urbanization and future climate change using the SWAT hydrological modelin the Anseong river basin (1,647 km2) adjacent to the west sea of Korea. The urbanization scenario was constructed based on increasingurban density and expansion, resulting in a decrease in groundwater recharge and recharge rate by 19.9 mm and 1.77 %, respectively. Future climate change scenarios were simulated using two models representing extreme rainfall and drought, with the drought modelindicating that maintaining an average recharge rate of 21.6 % would be challenging. Results from the combined scenario of urbanizationand extreme drought suggest that groundwater recharge during the spring season in urban areas would be most significantly affected.

SWAT-WET을 이용한 안동호의 수질 및 수생태계 모델 구축

우소영,김용원,김원진,김세훈,김성준,Woo, Soyoung,Kim, Yongwon,Kim, Wonjin,Kim, Sehoon,Kim, Seongjoon 한국수자원학회 2021 한국수자원학회논문집 Vol.54 No.9

The objective of this study is to develop the water quality and aquatic ecosystem model for Andong lake using SWAT-WET (Soil and Water Assessment Tool-Water Ecosystem Tool) and to evaluate the applicability of WET. To quantify the pollutants load flowing into Andong lake, a watershed model of SWAT was constructed for Andong Dam basin (1,584 km²). The calibration results for Dam inflow and water quality loads (SS, T-N, T-P) were analyzed that average R² was more than 0.76, 0.69, 0.84, and 0.60 respectively. The calibrated SWAT results of streamflow and nutrients concentration was used into WET input data. WET was calibrated and validated for water temperature, dissolved oxygen, and water quality concentration (T-N, T-P) of Andong lake. The WET calibrated results was analyzed that PBIAS was +19%, -13%, +4%, and +26.5% respectively and showed that it was simulated to a significant level compared with the observation data. The observed dry weight (gDW/m²) of zoobenthos was less than 0.5, but the average value of simulation was analyzed to be 0.8, which is because the WET model considers zoobenthos with a broader concept. Although accurate calibration is difficult due to the lack of observed data, SWAT-WET can analyze the effects of environmental change in the upstream watershed on the lake based on long-term simulation based on watershed model. Therefore, the results of this study can be used as basic data for managing the aquatic environment of Andong lake.

해안구조물을 이용한 지진해일 침수면적 저감 연구

우소영(Woo, So-Young),이상영(Lee, Sang-Young),조용식(Cho, Yong-Sik) 한국방재학회 2017 한국방재학회 학술발표대회논문집 Vol.2017 No.-

거주 후 평가(POE) 내용의 건축물 정보 연계 방안 연구 - 대구지역 근린 생활시설 대상 내용을 중심으로 -

우소영(Woo, So-Young),강신영(Kang, Sin-Yeong),박근택(Park, Geun-Tack),손유진(Son, Yu-Jin),유상아(Yu, Sang-Ah),전희진(Jeon, Hee-Jin) 대한건축학회 2022 대한건축학회 학술발표대회 논문집 Vol.42 No.1

This study seeks out the way of linking questionnaire responses of POE with building related data. Specifically, considering ether approach and convenience of gathering, the basic study was conducted to drive quantitative index and specific range based on importance degree and satisfaction of users or visitors to neighboring living facilities in Daegu. Consequently, the indexes of height of a building, ceiling height, standard and ratio of public space, opening rate in elevation, and opening and closing method were drawn out, and POE in progress was reflected and the ground was raid out to draw out additional indexes and moderate range.