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환경부 8일 유량,수질 자료를 이용한 SS오염부하량 산정의 한계점 분석
김태구 ( Taegoo Kim ),유종원 ( Jongwon Yoo ),조형익 ( Hyung Ik Cho ),한정호 ( Jeongho Han ),이동준 ( Dong Jun Lee ),정영훈 ( Younghun Jung ),양재의 ( Jae E Yang ),임경재 ( Kyoung Jae Lim ) 한국물환경학회(구 한국수질보전학회) 2016 한국물환경학회지 Vol.32 No.2
In recent years, there has been demand for precise estimations of pollutant loads on nationwide scale for the development of appropriate site specific (watershed specific) policies to reduce the negative impact of pollutant loads. River flow data and water quality data that were previously collected by various research institutes and universities for specific research purposes for a limited period was utilized in this study. However, only TMDL 8-day interval flow and water quality data were available in national scale. Three watersheds were selected and pollutant loads were calculated by two methods i.e., Numeric Integration (NI) method and Soil and Water Assessment Tool (SWAT). Subsequently, the results were compared to determine the appropriate method for monitoring nonpoint source networks nationwide. The SWAT model was calibrated and its estimated daily flow data were used in the NI method with estimated sediment data for 8-day monitoring data for three watersheds. The results indicated that the quantity of pollutant loads estimated with the NI and SWAT are different to some degrees especially during the summer season for all the three study watersheds. Thus, more frequent sampling of water quality is needed for nonpoint source pollutant estimation.
기능화된 다중벽 탄소나노튜브 복합재료의 제조 및 물성 평가에 대한 연구
박주혁(Joohyuk Park),김태구(Taegoo Kim) 대한기계학회 2004 대한기계학회 춘추학술대회 Vol.2004 No.4
Chemically modified multiwalled carbon nanotubes with acids were incorporated into a epoxy matrix by in situ polymerization process, to improve the transfer of mechanical load through chemical bonds, which were demonstrated by infrared spectroscopy. And the mechanical properties of epoxy/carbon nanotube composites were measured to investigate the role of carbon nanotubes. The epoxy/carbon nanotube composites shows higher tensile strength and wear resistance than existing epoxy, with 1 or 2 wt. % addition of functionalized carbon nanotubes. The tensile strength with 7 wt. % carbon nanotibes is increased by a 28% and the wear resistance in exceptionally increased by an outstanding 100 times.