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한국물환경학회> 한국물환경학회지> 경안천 유역 수질 및 이행평가 자료를 통한 임의적 오염총량관리제도 시행의 성과 분석

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경안천 유역 수질 및 이행평가 자료를 통한 임의적 오염총량관리제도 시행의 성과 분석

Effects of the Voluntary Scheme of Total Maximum Daily Load based on Water Quality and Annual Evaluation data in the Gyeongan Watershed, South Korea

이범연 ( Lee Bum-Yeon ) , 이창희 ( Lee Chang-hee )
  • : 한국물환경학회
  • : 한국물환경학회지 37권4호
  • : 연속간행물
  • : 2021년 07월
  • : 263-274(12pages)
한국물환경학회지

DOI

10.15681/KSWE.2021.37.4.263


목차

1. Introduction
2. Materials and Methods
3. Results and Discussion
4. Conclusion
Acknowledgement
References

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초록 보기

This study presents the achievements and limitations of the voluntary-based Total Maximum Daily Load (TMDL) through statistical analysis of water quality monitoring data and performance assessments of TMDL plans implemented in the Gyeongan watershed. The results clearly showed that responsible local governments complied the allocated TMDL and the designated water quality goals were successfully achieved in the required period. This was possible because the Ministry of Environment provided innovative incentives, such as, relaxations of the existing tight land-use regulations and full-scale financial aids for constructing and operating public treatment facilities to draw local government voluntary participation. However, a couple of problems which decreased the effectiveness and efficiency of the voluntary TMDL were identified. The different TMDL implementation schedules between upstream (Yongin) and downstream (Gwangju) governments caused delay in water quality improvement and exaggerated TMDL allocation to the local development which made excessive investment in the treatment facilities. Although it is not directly related to the voluntary scheme, technical methods for establishing and assessing the water quality goals should be improved so that the effects of flow conditions on water quality are properly assessed. We expect that results of this case study contribute to developing a more effective voluntary-based scheme for the implementation of the so-called ‘tributary TMDL’ in the future.

UCI(KEPA)

간행물정보

  • : 공학분야  > 환경공학
  • : KCI등재
  • :
  • : 격월
  • : 2289-0971
  • : 2289-098X
  • : 학술지
  • : 연속간행물
  • : 1985-2021
  • : 2379


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1시화호 해수유통량 증대에 따른 통계학적 수질 영향 분석

저자 : 이범연 ( Bum-yeon Lee ) , 이창희 ( Chang-hee Lee )

발행기관 : 한국물환경학회 간행물 : 한국물환경학회지 37권 6호 발행 연도 : 2021 페이지 : pp. 425-432 (8 pages)

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A tidal power plant (TPP) has been in operation since the end of 2011 to improve the water quality of Shihwa Coastal Reservoir (SCR). Tidal mixing rate increased 5.6 times after the TPP operation so that in this study, its effects on water quality was assessed through statistical analysis of long-term water quality monitoring data. It was found that the increased tidal mixing contributed to solving the hypoxia problem in the bottom water by preventing the summer stratification. The analysis also showed that the increased tidal mixing had different effects depending on the relative concentration difference for each water quality substances between the SCR and the outside of SCR. The average concentrations of some substances (chemical oxygen demand, total phosphorus, chlorophyll-a) with higher concentrations than the outside of SCR decreased due to the dilution effect, but the other substances (total nitrogen, dissolved inorganic nitrogen, dissolved inorganic phosphorus) with lower concentrations compared to the outside ones increased on the contrary. Factor analysis also showed a consistent result that the first factor accounting for the water quality was changed from the organic-related substances to the nutrient-related substances after the increased tidal mixing. These results imply that the focus of future water quality management needs shifting from the organic substances to the nutrients, particularly dissolved inorganic nutrients. Considering the effect of inflow seawater on the nutrients, the management area should be extended to cover not only SCR but also a certain area outside of SCR.

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2중수 재이용을 위한 오존 고도산화 및 세라믹 분리막 일체형 공정의 최적화 연구

저자 : 이종훈 ( Jonghun Lee ) , 노호정 ( Hojung Rho ) , 박광덕 ( Kwang Duck Park ) , 우윤철 ( Yun Chul Woo )

발행기관 : 한국물환경학회 간행물 : 한국물환경학회지 37권 6호 발행 연도 : 2021 페이지 : pp. 433-441 (9 pages)

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The aim of this study was to optimize the ozonation and ceramic membrane integrated process for greywater reclamation. The integrated process is a repeated sequential process of filtration and backwash with the same ceramic membrane. Also, this study used ozone and oxygen gas for the backwashing process to compare backwashing efficiency. The study results revealed that the optimum filtration and backwash time for the process was 10 minutes each when comparing the filtrate flow and membrane recovery rate. The integrated process was operated at three different operating conditions with i) 10 minutes for filtration and 10 minutes for ozonation, ii) 10 minutes for filtration and 10 minute for oxygen aeration, and iii) continuous filtration without any aeration for synthetic greywater. The integrated process with ozone backwashing could produce 0.55 L/min of filtrate with an average of 18.42% permeability recovery, while the oxygen backwashing produced 0.47 L/min and 6.26%, respectively. And without any backwashing, the integrated process could produce 0.29 L/min. This shows that the ozone backwash process is capable of periodically recovering from membrane fouling. The resistance of the fouled membrane was approximately 34.4% for the process with ozone backwashing, whereas the resistance was restored by 10.8% for the process with oxygen backwashing. Despite the periodical ozone backwashing and chemical cleaning, irreversible fouling gradually increased approximately 3 to 4%. Approximately 97.6% and 15% turbidity and TOC were removed by ceramic membrane filtration, respectively. Therefore, the integrated process with ozonation and ceramic membrane filtration is a potential greywater treatment process.

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3해수담수화 농축수 처리를 위한 한국 해수 특성 및 결정화 연구

저자 : 정상현 ( Sanghyun Jeong ) , David von Eiff , 변시영 ( Siyoung Byun ) , 이지은 ( Jieun Lee ) , Alicia Kyoungjin An

발행기관 : 한국물환경학회 간행물 : 한국물환경학회지 37권 6호 발행 연도 : 2021 페이지 : pp. 442-448 (7 pages)

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Seawater desalination is a technology through which salt and other constituents are removed from seawater to produce fresh water. While a significant amount of fresh water is produced, the desalination process is limited by the generation of concentrated brine with a higher salinity than seawater; this imposes environmental and economic problems. In this study, characteristics of seawater from three different locations in South Korea were analyzed to evaluate the feasibility of crystallization to seawater desalination. Organic and inorganic substances participating in crystal formation during concentration were identified. Then, prediction and economic feasibility analysis were conducted on the actual water flux and obtainable salt resources (i.e. Na2SO4) using membrane distillation and energy-saving crystallizer based on multi-stage flash (MSF-Cr). The seawater showed a rather low salinity (29.9~34.4 g/L) and different composition ratios depending on the location. At high concentrations, it was possible to observe the participation of dissolved organic matter and various ionic substances in crystalization. When crystallized, materials capable of forming various crystals are expected. However, it seems that different salt concentrations should be considered for each location. When the model developed using the Aspen Plus modular was applied in Korean seawater conditions, relatively high economic feasibility was confirmed in the MSF-Cr. The results of this study will help solve the environmental and economic problems of concentrated brine from seawater desalination.

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4미세조류 활성도 평가를 위한 Photosynthesis and Respiration (P&R) Analyzer 분석조건 최적화

저자 : 허재희 ( Jae-Hee Huh ) , 심태석 ( Tae-suk Sim ) , 황선진 ( Sun-jin Hwang )

발행기관 : 한국물환경학회 간행물 : 한국물환경학회지 37권 6호 발행 연도 : 2021 페이지 : pp. 449-457 (9 pages)

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Photosynthesis and respiration rate of microalgae are important factors during advanced wastewater treatment research using microalgae, There are several equipments and measurement methods for measuring photosynthesis and respiration, with different challenges that occur during pretreatment and stabilization of the analysis process. Therefore, in this study, for accurate Photosynthesis and Respiration (P&R) analyzer measurement, the analysis process was divided into pre-processing, DO stabilization, and analysis stages and each was optimized to enable accurate evaluation. For this purpose, the effect of DO saturation of the sample on P&R analysis, DO stabilization according to the degassing flow rate, and photoinhibition of the OD level on photosynthesis was investigated. Based on our study results, when DO was supersaturated, photosynthetic efficiency decreased due to photorespiration, making it inappropriate as a P&R sample. In addition, 0.5 L-N2/min level was the optimal nitrogen degassing flow rate for DO desaturation. The inhibition of photosynthetic efficiency by self-shading caused by the increase in OD was observed from OD 2.0, and it was found that P&R analysis is preferably performed on samples with OD less than 2.0. In addition, based on the above three optimization results , an optimized P&R Analyzer instruction for accurate P&R analysis was also presented.

KCI등재

5장마시기에 따른 농업용 저수지 내 용존 유기물 분광특성과 분자량 변화

저자 : 정가영 ( Ka-Young Jung ) , 이윤경 ( Yun Kyung Lee ) , 유하영 ( HaYoung Yoo ) , 남귀숙 ( Gui-sook Nam ) , 허진 ( Jin Hur )

발행기관 : 한국물환경학회 간행물 : 한국물환경학회지 37권 6호 발행 연도 : 2021 페이지 : pp. 458-468 (11 pages)

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In this study, we investigated the variations of dissolved organic matter (DOM) in an agricultural reservoir during the monsoon period (June to October, 2020) with respect to the organic carbon concentration (DOC), molecular weight distribution, and optical properties. The monsoon period was divided into three phases - beginning storm (BS), during storm (DS), and after storm (AS). Our results showed significant differences in the concentrations and characteristics of DOM during the summer monsoon. The DOC concentrations were decreased after the monsoon, probably due to a dilution effect. In contrast, increasing trends were observed in the specific UV absorbance (SUVA), and relative abundances of humic-like fluorescence and larger-sized compounds. These observations implied that the large-sized and humic-like organic components with terrestrial origins strongly affected the reservoir DOM after the summer monsoon. Meanwhile, biopolymer size fraction, which is associated with algal activity, became more abundant after the monsoon. These results suggest that DOM with autochthonous sources became dominant as a result of the inflow of nutrients into the reservoir after the storm. Spatial changes in DOM within the reservoir were not pronounced as much as the temporal variations. All taken, it can be concluded that the summer monsoon simply led to the decrease of DOM concentrations while the sources and the quality of DOM underwent substantial changes, which may enrich refractory organic matter in the reservoir. This study reveals the importance of in-depth DOM quality monitoring before and after summer monsoon for effective water quality management in agricultural reservoirs.

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6SWAT 모형을 활용한 유황별 비점오염 저감 효율 분석 - 달천 유역을 대상으로 -

저자 : 김수홍 ( Soohong Kim ) , 홍지영 ( Jiyeong Hong ) , 박운지 ( Woonji Park ) , 김종건 ( Jonggun Kim ) , 임경재 ( Kyoungjae Lim )

발행기관 : 한국물환경학회 간행물 : 한국물환경학회지 37권 6호 발행 연도 : 2021 페이지 : pp. 469-482 (14 pages)

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The recent climate change and urbanization have seen an increase in runoff and pollutant loads, and consequently significant negative water pollution. The characteristics of the pollutant loads vary among the different flow regime depending on their source and transport mechanism, However, pollutant load reduction based on flow regime perspectives has not been investigated thoroughly. Therefore, it is necessary to analyze the effects of concentration on pollutant load characteristics and reductions from each flow regime to develop efficient pollution management. As non-point pollutants continuously increase due to the increase in impervious area, efficient management is necessary. Therefore, in this study, 1) the characteristics of pollutant sources were analyzed at the Dalcheon Basin, 2) reduction of nonpoint pollution, and 3) reduction efficiency for flow regimes were analyzed. By analyzing the characteristics of the Dalcheon Basin, a reduction efficiency scenario for each pollutant source was constructed. The efficiency analysis showed 0.06% to 5.62% for the living scenario, 0.09 to 24.62% for the livestock scenario, 0.17% to 12.81% for the industry scenario, 9.45% to 38.45% for the land scenario, and 9.8% to 39.2% for the composite scenario. Therefore, various pollution reduction scenarios, taking into account the characteristics of pollutants and flow regime characteristics, can contribute to the development of efficient measurements to improve water quality at various flow regime perspectives in the Dalcheon Basin.

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7쌀겨 바이오차와 분말 활성탄을 이용한 메틸렌 블루와 휴믹산 제거 효율 비교

저자 : 이주원 ( Lee Juwon ) , 정은주 ( Jeong Eunju ) , 이정민 ( Lee Jungmin ) , 이용구 ( Lee Yong-Gu ) , 전강민 ( Chon Kangmin )

발행기관 : 한국물환경학회 간행물 : 한국물환경학회지 37권 6호 발행 연도 : 2021 페이지 : pp. 483-492 (10 pages)

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This study evaluated the removal efficiencies of methylene blue (MB) and humic acids (HA) using a rice husk (RH) biochar and powdered activated carbon (PAC). The pseudo-second-order model better presented the adsorption of MB and HA onto a RH biochar than the pseudo-first-order model. Furthermore, better description of the adsorption behavior of MB and HA by the Langmuir isotherm model (R2 of the RH biochar: MB = 0.986 and HA = 0.984; R2 of PAC: MB = 0.997 and HA = 0.989) than the Freundlich isotherm model (R2 of the RH biochar: MB = 0.955 and HA = 0.965; R2 of PAC: MB = 0.982 and HA = 0.973) supports the assumption that monolayer adsorption played key roles in the removal of MB and HA using the RH biochar and PAC. Batch experiments were performed on the effects of dosage, temperature, and pH. For all experiments, PAC showed higher efficiencies than RH biochar and MB adsorption efficiencies were higher than those of HA. Adsorption efficiencies increased with increasing amounts of adsorbents and temperature. As the pH increased, adsorption efficiencies of MB were increased while adsorption efficiencies of HA were decreased.

KCI등재

8수상태양광 정책의제설정 연구 - 기술과 제도의 공진화 관점 -

저자 : 이유현 ( Youhyun Lee ) , 김경민 ( Kyoung-min Kim )

발행기관 : 한국물환경학회 간행물 : 한국물환경학회지 37권 6호 발행 연도 : 2021 페이지 : pp. 493-500 (8 pages)

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Floating solar photovoltaic (hereinafter PV) power generation is emerging as a proper alternative to overcome various environmental limitations of existing offshore PV generation. However, more government-led policy design and technical and institutional development are still required. Based on the policy agenda setting theory and technological innovation theory, this study contains the research questions concerning the co-evolution of technology and the floating solar PV policy. This study primarily evaluates the technological and institutional development level of floating solar PV policy through a survey of domestic floating solar PV experts. Secondly, we also analyze the kind of policy agenda that should be set a priori. Analyzing the priorities to be considered, the first environmental enhancement needs to be considered from both the technical and institutional aspects. The second candidate task for the policy agenda is residents' conflict and improvement of regulations. Both candidate tasks need to be actively considered in the policy agenda from the institutional point of view. The third is publicity, profit sharing, follow-up monitoring, and cost. Among them, public relations and profit sharing are tasks that need to be considered in the policy agenda from the institutional point of view. On the other hand, the cost of follow-up monitoring should be considered as a policy agenda in terms of technology, system, and common aspects. Finally, there are technical standards. Likewise, technical standards need to be considered in the policy agenda in terms of both technical and institutional commonality.

KCI등재

9미량 및 신종유해물질의 국내 방류 환경에서의 위해성 평가: 환경부 지정 1순위 80종 대상으로

저자 : 이재엽 ( Lee Jai-yeop ) , 박새롬 ( Park Saerom ) , 김일호 ( Kim Ilho )

발행기관 : 한국물환경학회 간행물 : 한국물환경학회지 37권 6호 발행 연도 : 2021 페이지 : pp. 501-509 (9 pages)

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In 2018, total 263 micro and emerging contaminants were selected as target substances by the Ministry of Environment, and 80 of them were first-class substance including endocrine disruptors, residual Pharmaceuticals and Personal Care Products (PPCPs), residual organic pollutants, pesticides and heavy metals. In this study, in order to evaluate the Hazard Quotient (HQ) of the 80 types in the domestic water environment the concentration of discharged effluent and nearby water environment reported by Korean institutes since 2010 was investigated. There were 45 substances reported to be detected, and Measurement Environment Concentration (MEC) were obtained by collectively converting them into water environment concentration. For biotoxicity, half maximal Effective Dose (EC50) to Daphnia magna, a water fleas species widely adopted in Material Safety Data Sheet (MSDS) was applied. As for the biotoxicity level, the Predicted No-Effect Concentration (PNEC) was obtained by applying the Assessment Factor (AF) and the HQ was derived by dividing it from the MEC. As a result of calculating the HQ, more than 1 substances were Cabamazepine, Mefenamic acid, Acetaminophen, Ibuprofen, Nonylphenol, Nickel, Erythromycin, Acetylslic acid, etc. Meanwhile, perfluorinated compounds were identified as hazardous substances in the water environment, with 5 out of 14 species included in the 20 ranks of first-class substance.

KCI등재

10HS-GC/MS를 이용한 퇴적물 중 휘발성유기화합물 분석 - 외부 및 내부표준방법에서 매질영향 확인 -

저자 : 신명철 ( Myoung-chul Shin ) , 정다솜 ( Da-som Jung ) , 노혜란 ( Hye-ran Noh ) , 유순주 ( Soon-ju Yu ) , 서용찬 ( Yong-chan Seo ) , 이보미 ( Bo-mi Lee )

발행기관 : 한국물환경학회 간행물 : 한국물환경학회지 37권 6호 발행 연도 : 2021 페이지 : pp. 510-519 (10 pages)

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Volatile Organic Compounds (VOCs) in sediments, which can cause human health problems, have been monitored in Korea since 2014. Measured VOC concentrations can be affected by matrix type and the volatility of target substances. In this study, (1) VOCs volatility and the influence of matrix interference were confirmed, and (2) internal standards (IS) method was applied to improve analytical method. For these purposes, method detection limit (MDL), calibration linearity, precision and accuracy of VOCs were compared in various matrices using the IS. Some of VOCs in sediments showed different peak areas and reduced rates compared to water matrix. It was suggested that adsorption properties of sediments hindered the migration to vapor during heat pretreatment in headspace method. A calibration curve was created in clean sand. Recovery rates for the calibration curve method and IS applying method were 64.1~83.1% and 99.1~119.3%, respectively. Relative standard deviations ranged from 11.1% to 21.6% for the calibration curve method and those for IS ranged 4.7% to 13.7%. In case of real sediment, calibration curve and 1,2-Dichlorobenzene-d4 (ODCB) among IS were not suitable. The average recovery rate of Fluorobenzene (FBZ) increased by 56.4% and Relative Standard Deviation (RSD) by 4.7%. However, the recovery rate was increased in the samples with large values of igniting intensity.
This study confirmed that influence of the matrix of VOCs in sediment, and addition of IS materials improved precision and accuracy. Although IS corrects volatilization and adsorption, it is recommended that more than two types of IS should be added rather than single.

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KCI등재

1황구지천 유역의 오염부하 특성 및 지류 영향 평가

저자 : 임수진 ( Su-jin Lim ) , 임병란 ( Byung-Ran Lim ) , 이한샘 ( Han-saem Lee ) , 강주형 ( Joo-hyoung Kang ) , 안태웅 ( Tae-ung Ahn ) , 신현상 ( Hyun-sang Shin )

발행기관 : 한국물환경학회 간행물 : 한국물환경학회지 37권 4호 발행 연도 : 2021 페이지 : pp. 249-262 (14 pages)

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This study investigated the pollution characteristics of the main pollution zone in the Hwangguji watershed and the influence of the tributary on the main stream. The characteristics of the main pollution zone, including, the water quality index (WQI), stream rating, load duration curve (LDC), delivery load density (DLD), and contribution of the tributary to the mainstream, were evaluated by time-series visual heatmap. The WQI of the mainstream of Hwangguji was lowered to the poor (IV) level from the inflow point of Suwon stream (SW) and the LDC excess rate in the T-P was higher than that of BOD5, especially for the wet season, suggesting that management of non-point source with T-P is preferred. The contribution (%) of the tributaries in the upstream section of Hwangguji watershed were BOD5 14.54%, TOC 15.67%, T-N 5.43%, and T-P 6.97%. In particular, the Suwon sewage treatment plant located in the mainstream showed a high contribution of BOD5 (64.40%) and T-P (53.54%), respectively, due to the high discharge rate (6.019 ㎥/sec). Meanwhile, Sammi and Gal stream have a large impact on the mainstream with high DLD and poor WQI. Thus, both streams were considered as pollution hot spots. These results provide useful basic data for preparing more effective water quality improvement and management plans in the watershed.

KCI등재

2경안천 유역 수질 및 이행평가 자료를 통한 임의적 오염총량관리제도 시행의 성과 분석

저자 : 이범연 ( Lee Bum-Yeon ) , 이창희 ( Lee Chang-hee )

발행기관 : 한국물환경학회 간행물 : 한국물환경학회지 37권 4호 발행 연도 : 2021 페이지 : pp. 263-274 (12 pages)

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This study presents the achievements and limitations of the voluntary-based Total Maximum Daily Load (TMDL) through statistical analysis of water quality monitoring data and performance assessments of TMDL plans implemented in the Gyeongan watershed. The results clearly showed that responsible local governments complied the allocated TMDL and the designated water quality goals were successfully achieved in the required period. This was possible because the Ministry of Environment provided innovative incentives, such as, relaxations of the existing tight land-use regulations and full-scale financial aids for constructing and operating public treatment facilities to draw local government voluntary participation. However, a couple of problems which decreased the effectiveness and efficiency of the voluntary TMDL were identified. The different TMDL implementation schedules between upstream (Yongin) and downstream (Gwangju) governments caused delay in water quality improvement and exaggerated TMDL allocation to the local development which made excessive investment in the treatment facilities. Although it is not directly related to the voluntary scheme, technical methods for establishing and assessing the water quality goals should be improved so that the effects of flow conditions on water quality are properly assessed. We expect that results of this case study contribute to developing a more effective voluntary-based scheme for the implementation of the so-called 'tributary TMDL' in the future.

KCI등재

3딥러닝 사물 인식 알고리즘(YOLOv3)을 이용한 미세조류 인식 연구

저자 : 박정수 ( Jungsu Park ) , 백지원 ( Jiwon Baek ) , 유광태 ( Kwangtae You ) , 남승원 ( Seung Won Nam ) , 김종락 ( Jongrack Kim )

발행기관 : 한국물환경학회 간행물 : 한국물환경학회지 37권 4호 발행 연도 : 2021 페이지 : pp. 275-285 (11 pages)

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Algal bloom is an important issue in maintaining the safety of the drinking water supply system. Fast detection and classification of algae images are essential for the management of algal blooms. Conventional visual identification using a microscope is a labor-intensive and time-consuming method that often requires several hours to several days in order to obtain analysis results from field water samples. In recent decades, various deep learning algorithms have been developed and widely used in object detection studies. YOLO is a state-of-the-art deep learning algorithm. In this study the third version of the YOLO algorithm, namely, YOLOv3, was used to develop an algae image detection model. YOLOv3 is one of the most representative one-stage object detection algorithms with faster inference time, which is an important benefit of YOLO. A total of 1,114 algae images for 30 genera collected by microscope were used to develop the YOLOv3 algae image detection model. The algae images were divided into four groups with five, 10, 20, and 30 genera for training and testing the model. The mean average precision (mAP) was 81, 70, 52, and 41 for data sets with five, 10, 20, and 30 genera, respectively. The precision was higher than 0.8 for all four image groups. These results show the practical applicability of the deep learning algorithm, YOLOv3, for algae image detection.

KCI등재

4고속도로 노면퇴적물의 특성 및 도로청소에 의한 입도별 제거효율 분석

저자 : 강희만 ( Heeman Kang ) , 김황희 ( Hwang Hee Kim ) , 전지홍 ( Ji-hong Jeon )

발행기관 : 한국물환경학회 간행물 : 한국물환경학회지 37권 4호 발행 연도 : 2021 페이지 : pp. 286-295 (10 pages)

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The removal efficiency of road-deposited sediment (SDR) by road sweeping was analyzed by performing particle size analysis before and after road sweeping at four highways during May to December 2019. The SDR accounted for the largest proportion in the range of 250 to 850 ㎛ and the degree of its proportion had an effect on the particle size distribution curve. The particle size distribution of the collected sediments showed a similar distribution at all sites. Below 75 ㎛, the removal efficiency of SDR showed a constant value around 40%, but above 75 ㎛, it increased as the particle size increased. The removal efficiency was 82-90% (average 86%) for gravel, 66-93% (average 79%) for coarse sand, 35-92% (average 64%) for fine sand, 29-69% (average 44%) for very fine sand, 19-58% (average 40%) for silt loading, 10-59% (average 40%) for TSP, 13-57% (average 40%) for PM10, and 15-61% (average 38%) for PM2.5. SDR removal efficiency showed an average of 69% for the four highways. It was found that if the amount of SDR was less than 100 g/m2, it was affected by the road surface condition and had a large regional deviation. As such, the amount of SDR and the removal efficiency increased. The fine particles, which have relatively low removal efficiency, contained a large amount of pollutants, which is an important factor in water and air pollution. Therefore, various measures to improve the removal efficiency of fine particles in SDR by road sweeping are needed.

KCI등재

5부산지역 도시하천 표층 퇴적물 오염도 평가에 관한 연구

저자 : 곽진숙 ( Jin-suk Kwag ) , 손정원 ( Jung-won Son ) , 김주인 ( Chu-In Kim ) , 송복주 ( Bok-Joo Song )

발행기관 : 한국물환경학회 간행물 : 한국물환경학회지 37권 4호 발행 연도 : 2021 페이지 : pp. 296-305 (10 pages)

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This work investigated heavy metal pollution in surface sediments of rivers in Busan, Korea. Surface sediments were analyzed in order to conduct contamination assessment of organic matter, nutrients, and heavy metal concentrations. Contamination assessment of heavy metals was conducted using geoaccumulation index (Igeo), pollution load index (PLI), and potential ecological risk index (RI). Accumulation of organic matter and nutrients were affected by water discharged from sewage treatment plant. The concentrations of organic matter and nutrients were found to be greater in points which were close to the sewage treatment plant more than points furthest. The concentrations of Pb, Zn, Cu, Cd, Hg, As, Cr, and Ni were found to be greater in surface sediment more than in the background. The mean concentrations of heavy metals were in the order of Zn (323.5 mg/kg) > Cu (70.5 mg/kg) > Pb (39.8 mg/kg) > Cr (33.4 mg/kg) > Ni (13.5 mg/kg) > As (9.4 mg/kg) > Cd (0.84 mg/kg) > Hg (0.092 mg/kg). The result of geoaccumulation indices indicated that Hg > Cr > Cu > Ni > Zn > As > Pb > Cd were found in order of severe contamination by heavy metals. From PLI and RI analysis, it was evident that the Suyeonggang 2 was the most contaminated river.

KCI등재

6가축분뇨 퇴비·액비의 비료성분 및 중금속 함량에 관한 연구

저자 : 안태웅 ( Ahn Taeung ) , 김동민 ( Kim Dongmin ) , 이흥수 ( Lee Heungsoo ) , 신현상 ( Shin Hyunsang ) , 정유진 ( Chung Eugene )

발행기관 : 한국물환경학회 간행물 : 한국물환경학회지 37권 4호 발행 연도 : 2021 페이지 : pp. 306-314 (9 pages)

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The application of organic fertilizer could be accompanied by potential hazards to soil and humans due to trace metals. Livestock manure compost·liquefied fertilizer is a well-established approach for the stabilization of nutrients and the reduction of pathogens and odors in manures, which can be evaluated as compost·liquefied. In this study, the livestock manure compost·liquefied fertilizers produced at 333 liquid manure public resource centers and liquid fertilizer distribution centers were collected from May to December 2019. The nutrient content (nitrogen, phosphorus, and potassium), physicochemical properties, and heavy metal content were investigated. The livestock manure compost·liquefied fertilizer was measured using a mechanical maturity measurement device. The organic matter, arsenic, cadmium, mercury, lead, chromium, copper, nickel, zinc, E. coli (O157:H7), Salmonella, etc. of the livestock manure compost·liquefied fertilizers were analyzed. The average heavy metal content in the livestock manure compost·liquefied fertilizer was as follows: Cr 2.9 mg/kg (0.2~8.7 mg/kg), Cu 20.4 mg/kg (1.6~74.1 mg/kg), Ni 1.3 mg/kg (0.4~4.2 mg/kg), and Zn 79.8 mg/kg (3.0~340.7 mg/kg). Although large-scale organic fertilizer plants and resources recycling centers produce good organic (liquid) fertilizers with proper components, it is necessary to standardize livestock manure compost·liquefied fertilizer in order to facilitate efforts to turn livestock manure into useful resources.

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