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다중선형회귀분석 기반 건설장비 이산화탄소 배출량 예측모델 개발
권재민 ( Gwon Jae-min ),이재학 ( Lee Jae-hak ),조민도 ( Jo Min-do ),최영준 ( Choi Young-jun ),한승우 ( Han Seung-woo ) 한국건축시공학회 2019 한국건축시공학회 학술발표대회 논문집 Vol.19 No.2
Environmental problems caused by GHG emitted by various industries are emerging around the world, and accordingly, relevant regulations are being applied by countries around the world. Korea is operating a carbon credit system that trades GHG in industry for money, which is expected to be applied to the construction industry. In addition, construction equipment using fossil fuels accounts for the largest portion of CO<sub>2</sub> emissions in the construction industry, and the importance of CO<sub>2</sub> reduction and prediction is increasing. However, there is a lack of data on the directly measured CO<sub>2</sub> emissions of construction equipment and there is no accurate methodology for measuring methods. Therefore, in this study, independent variables were derived based on the CO<sub>2</sub> emission data. In addition, multiple linear regression is performed for each independent variable to derive a predictive model of carbon dioxide emission by work type of construction equipment. It is expected that the construction process plan based on environmental factors in the construction industry can be established in the future.
새만금 간척지에서 토양특성별 제염 및 재염화특성에 관한 연구
송재도 ( Jae Do Song ),손재권 ( Jae Gwon Son ),최진규 ( Jin Kyu Choi ),장태일 ( Tae Il Jang ),조재영 ( Jae Young Cho ),한평희 ( Pyeong Hee Han ),우혜진 ( Hye Jin Woo ) 한국농공학회 2014 한국농공학회 학술대회초록집 Vol.2014 No.-
새만금 간척사업은 1991년 11월 방조제공사가 착공되었으며, 2006년 4월 방조제 끝물막이 공사로 그 모습이 드러나게 되었다(농어촌공사, 2000). 본 사업을 통해 간척 토지 면적 28,300 ha와 담수호 면적 11,800 ha를 조성하여 전체 개발면적 40,100 ha를 계획하고 있다(농어촌공사, 1998). 새만금 간척지중 농업용지에 대한 내부개발 공사는 새만금 첨단농업시험단지, 농어업회사 부지 등이 포함된 농업용지 5공구를 대상으로 이루어지고 있는 상황이다. 그러나, 간척지 내부개발공사가 완료된 이후 본격적인 영농작업을 실시할 경우 간척지 토양 내 함유된 염분에 대한 종합적인 관리대책이 필요할 것으로 여겨진다. 이에 본 연구에서는 현재 공사가 진행중에 있는 새만금 농업용지5공구지역의 대표적인 토양이라 할 수 있는 미사질양토, 사양토, 양질사토 토양을 대상으로 제염 및 재염화에 대한 라이시미터시험을 실시하였다. 초기 제염시 미사질양토 토양은 지속적인 용수를 공급하였음에도 불구하고 토양침출이 이루어지지 않고 있었으나, 사양토와 양질사토 토양에서는 초기 전기전도도(EC)가 각각 6.9dS/m, 9.3dS/m였다가 초기 제염용수 300mm공급시 토양심도 60cm까지 2dS/m수준으로 제염이 이루어지고 있었다. 또한, 초기 제염이후 무관개, 간단관개, 상시관개 등 관개방식을 달리하여 적용한 결과 무관개시에는 사양토, 미사질양토, 양질사토 순으로 토양염분 상승이 이루어졌고, 간단관개나 상시관개에서는 재염화에 대한 방지효과가 있었다. 따라서, 향후 새만금 간척지에서 작물재배시에는 작물생육특성과 더불어 간척지 토양특성을 감안하여 제염방식이나 관개방식 적용이 필요할 것으로 판단된다.
손재권 ( Son Jae Gwon ),구자웅 ( Cho Jae Young ),최진규 ( Koo Ja Woong ),조재영 ( Choi Jin Kyu ),송재도 ( Song Jae Do ),김영주 ( Kim Young Ju ),황선아 ( Hwang Seon Ah ),이강수 ( Lee Kang Soo ) 한국농공학회 2007 한국농공학회 학술대회초록집 Vol.2007 No.-
The research was conducted to analyzed the sediments of Dongjin watersheds in reclaimed tideland of Saemangeum under consideration of physico-chemical properties in order to suggest for basic data the reasonable management of the highly salinized reclaimed tideland and to secure the way to desalinize. The distribution of soil texture in sediments was mainly sandy loam and loamy sand, as 58.3% of sandy loam, 38.2% of loamy sand, and 3.5% of sand, respectively. The saturation was in the range of 33.4 ~ 58.5% and the average of DJA, DJB, and DJC was 45.6, 41.1, and 40.5%, respectively. And the overall average was 41.9%. The EC was entirely in the range of 17.2 ~ 39.8 dS/m and the average of DJA, DJB, and DJC was 25.7, 30.2 and 33.1 dS/m, respectively. The pH was in the range of 6.40 ~ 8.57 and the average of DJA, DJB, and DJC was 7.05, 7.15 and 7.37, respectively. The CEC of sediment was in the range of 5.25 ~ 11.95 cmol/kg and the average of DJA, DJB, and DJC was 8.33, 7.64 and 7.45 cmol/kg, respectively. The concentration of OM was in the range of 0.14 ~ 6.55% and the average of DJA, DJB, and DJC was 2.21, 0.92 and 1.17%, respectively.
새만금 전작·원예단지 예정대상지구 해저퇴적물 중 중금속 분포
손재권 ( Son Jae Gwon ),구자웅 ( Cho Jae Young ),최진규 ( Koo Ja Woong ),조재영 ( Choi Jin Kyu ),송재도 ( Song Jae Do ),김영주 ( Kim Young Ju ),황선아 ( Hwang Seon Ah ),이강수 ( Lee Kang Soo ) 한국농공학회 2007 한국농공학회 학술대회초록집 Vol.2007 No.-
The present study was carried out to investigate the heavy metals concentrations of surfical sediment of in candidates areas of upland-horticultural fields in the Saemangeum reclaimed tideland. The concentrations of heavy metals in surfical sediments were found to be background level except for partially sites. Although the heavy metals concentrations don't meet the warning standard of agricultural land contamination, it was suggested that constant monitoring and interception from external pollutants are need for water-soil-plant system conservation.
손재권 ( Son Jae-gwon ),구자웅 ( Koo Ja-woong ),최진규 ( Choi Jin-kyu ),조재영 ( Cho Jae-young ),송재도 ( Song Jae-do ),김영주 ( Kim Young-ju ) 한국농공학회 2005 한국농공학회 학술대회초록집 Vol.2005 No.-
A aggregate size distribution is an important in successful crop production in reclaimed tidelands. The aggregate size distribution for this study were determined of 0.1mm, 0.5mm, 1.0mm, and 2.0mm by wet sieving method. Agricultural activity, period of reclamation showed significant effects on aggregate size distribution in reclaimed tidelands. The percentage of < 2mm aggregates for SMG, GHD, and SM reclaimed tidelands were ranged 8.9, 36.7, and 38.0%, respectively. The percentage of >0.1mm aggregates for SMG, GHD, and SM reclaimed tidelands were ranged 9.0, 26.0, and 48.9%, respectively.
새만금 전작·원예단지 예정대상지구 해저퇴적물의 물리·화학적 특성
손재권 ( Son Jae Gwon ),구자웅 ( Cho Jae Young ),최진규 ( Koo Ja Woong ),조재영 ( Choi Jin Kyu ),송재도 ( Song Jae Do ),김영주 ( Kim Young Ju ),황선아 ( Hwang Seon Ah ),이강수 ( Lee Kang Soo ) 한국농공학회 2007 한국농공학회 학술대회초록집 Vol.2007 No.-
In this study, it was investigated that the physico-chemical properties of the sentiment from candidates sites of upland-horticultural fields in the Samangeum reclaimed tideland in order to suggest for basic data for the development of reclaimed agricultural land. The soil texture of Gwanghwal, Gyehwa, ManKyung and Okgu tidal flat appeared to be sandy loam, identically. The average of pH in sediment appeared 7.62, 7.42, 7.42 and 7.82, respectively. The average of EC in the above sites appeared 27.11, 41.0, 26.5 and 27.8 dS/m, respectively. The average of CEC appeared 12.79, 8.82, 13.27 and 10.75 cmol/kg, respectively. For the average of exchangeable sodium percentage (ESP), Gyehwa and Okgu seemed to be higher, 73.62% and 61.05%.
손재권 ( Son Jae Gwon ),최진규 ( Choi Jin Kyu ),구자웅 ( Koo Ja Woong ),조재영 ( Cho Jae Young ),송재도 ( Song Jae Do ) 한국농공학회 2002 한국농공학회 학술대회초록집 Vol.2002 No.-
The purpose of this study was to get the change of stream water quality in upper stream of Dong-jin river stream, water samples were taken at samling site during 6 month with from march to August in 2002. The water temperature and pH of stream water were ranged 9.0~29.4℃, 6.48~9.33, respectively. The COD values of stream water was ranged from 0.60 to 19.06. The content of T-N and T-P were 1.88~6.74㎎/L, ND(not detcted)~0.50㎎/L, by the livestock wastes and agricultural activity, respectively. Also, suspended solids of stream water was ranged 0.4㎎/L~322.0㎎/L. The contents of heavy metal Zn, Cu, and Pb were ND~0.070㎎/L, ND~0.012㎎/L, and ND~0.043㎎/L, respectively. Cd was not dected in all the samples.
손재권 ( Son Jae Gwon ),구자웅 ( Koo Ja Woong ),최진규 ( Choi Jin Kyu ),송재도 ( Song Jae Do ) 한국농공학회 1999 한국농공학회 학술대회초록집 Vol.1999 No.-
In order to make the reasonable irrigation plan in the reclaimed paddy fields, the estimation of irrigation water requirements by soil textures and water management methods for the normal growth of crops is very important. This study was carried out to determine leaching water requirements before cultivating crops. For the purpose of this study, the physical and chemical properties of soil samples used in the desalinization experiments were analyzed, and changes of salinity by supplying water and leaching water were investigated in the experimental field with lysimeters.
손재권 ( Son Jae Gwon ),박종민 ( Park Jong Min ),최진규 ( Choe Jin Gyu ),송재도 ( Song Jae Do ) 한국농촌계획학회 2003 농촌계획 Vol.9 No.2
It is the purpose of this study to investigate the change of stream water quality in upper stream of Dongjin river, and to give the basic information for the conservation of water quality. Water samples were taken periodically at 9 sampling sited during 8 months from March to October in 2002. 1. The water temperature and pH stream water were ranged 9.0~29.4℃, 6.48~9.33, respectively. The COD values of stream water was ranged from 0.60 to 19.06. The contents of T-N and T-P mainly affected by the livestock wastes, and agricultural activity were 1.88~6.74 mg/L, ND(not detcted)~0.50 mg/L, respectively. 2. The SS, DO and BOD values of stream water were ranged 0.4mg/L~274.0mg/L, 0.5~6.0 mg/L, and 7.3~13.7mg/L respectively. 3. The cation is one of the important components in analysis of stream water qauality. The contents of analysis, Ca^(++), Mg^(++),Na^(++), and K^(+) were ranged 1.96~11.08mg/L, 1.21~6.16 mg/L, 3.38~18.44 mg/L, 1.12~7.96 mg/L, respectively. SAR was ranged 0.31~1.63 below 2.0. The contents of cation showed in the order Na ^(++), >Ca^(++), >K^(+) > Mg^(+). 4. The contents of heavy metal Zn, Cu, and Pb were ND~0.071 mg/L, ND~0.012 mg/L, and ND~0.043 mg/L, respectively. Cd was not detected in all samples. 5. As a result of these researches showed water quality in upper stream watershed of Dongjin river more affected by livestock wastes and living sewage than agricultural activity.
우리나라 서남해안 간척지 및 간석지 토양중 중금속 오염물질의 형태별 함량 분포
조재영 ( Cho Jae-young ),손재권 ( Son Jae-gwon ),최진규 ( Choi Jin-kyu ),송재도 ( Song Jae-do ),정병엽 ( Chung Byung-yeoup ) 한국농공학회 2004 한국농공학회 학술대회초록집 Vol.2004 No.-
우리나라 서남해안 간척지 및 간석지 토양중에 분포하는 중금속 오염물질의 화학적 형태별 함량을 조사하기 위하여 서남해안 4개 지역에 걸쳐 대표성이 있다고 판단되는 10개 지구에서 총102점의 토양시료를 채취하여 토양중 중금속의 화학적 형태별 함량을 분석한 결과는 다음과 같다. 1. 토양중 조사대상 중금속 오염물질의 전체 양은 Cu의 경우 7.7-54.1 mg/kg의 범위로 평균26.5 mg/kg, Cr은 27.9-80.8 mg/kg (537 mg/kg), Pb은 45.8-133.7 mg/kg (74.0 mg/kg), Cd은 0.2-1.8 mg/kg(0.8 mg/kg), 그리고 Zn은 40.7-174.4 mg/kg (93.4 mg/kg)을 나타내었다. 2. 우리나라 서남해안 간척지 및 간석지 토양중 중금속 오염물질의 화학적 형태별 분포를 조사한 결과, Water soluble과 치환태 (1M KCl-extracted) 중금속 형태는 조사대상 중금속 오염물질에서 미량 검출되었고 거의 대부분이 잔류태 (residual) 및 유기물과 결합된 형태 (organically bound)로 나타났다. The chemical fractionation of heavy metals was investigated in reclaimed tidelands and tidelands of southwest coastal area of Korea. The ranking of different fractions of heavy metals in reclaimed tideland soil samples was as follows: Cu : 0.1M NaOH-extracted > 0.1 M Na<sub>2</sub>P<sub>2</sub>O<sub>7</sub>-extracted > residual > 1M KCl-extracted = water soluble fraction. Cr : residual > 0.1M NaOH-extracted > 0.1 M Na<sub>2</sub>P<sub>2</sub>O<sub>7</sub>-extracted > water soluble > 1M KCl-extracted. Pb : 0.1M NaOH-extracted > residual > 0.1 M Na<sub>2</sub>p<sub>2</sub>O<sub>7</sub>-extracted > water soluble > 1M KCI- extractcd. Cd : residual > 0.1M NaOH-extracted > 0.1 M Na<sub>2</sub>P<sub>2</sub>O<sub>7</sub>-extracted > water soluble = 1M KCl-extracted. Zn : 0.1 M NaOH-extracted > residual > 0.1 M Na<sub>2</sub>P<sub>2</sub>O<sub>7</sub>-extracted > water soluble > 1M KCl-extracted. The content of residual Zn in reclaimed tidelands and tidelands showed positive correlation with organic matter content but organically bound Zn showed negative correlations with CEC. The content of residual Cd and exchangeable Cd showed highly positive correlation with organic matter content but residual-, organically bound-, and exchangeable Cd showed negative correlations with CEC. Water soluble Pb showed positive correlation with CEC but organically bound Pb showed negative correlation with CEC.