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권성일,김진수,박종화,오광영,송철민,Kwon, Sung-Ill,Kim, Jin-Soo,Park, Jong-Hwa,Oh, Kwang-Young,Song, Chul-Min 한국농공학회 2008 한국농공학회논문집 Vol.50 No.2
We investigated characteristics of temperature variation in urban and suburban areas(e.g., paddy field, upland, park, residential area) and urban heat island(UHI) during winter(December 2005 to February 2006). The daily maximum air temperature was not significantly different between suburban and urban areas, whereas the daily minimum air temperatures were significantly lower in the suburban areas than that in the residential area. The wind speed in the urban park(0.3 m/s) was much lower than that in the paddy fields(2.3 m/s), likely due to an urban canopy layer formed by high buildings. The UHI intensity was represented by differences in daily minimum temperatures between urban residential and paddy field areas. The UHI intensity($4.1^{\circ}C$) in winter was larger than that($2.6^{\circ}C$) in summer. This may be because a stable boundary layer develops in the winter, and thereby this inhibits diffusion of heat from surface.
권성일 ( Kwon Sung Ill ),김진수 ( Kim Jin Soo ),박종화 ( Park Jong Hwa ),오광영 ( Oh Kwang Young ),송철민 ( Song Chul Min ) 한국농공학회 2006 한국농공학회 학술대회초록집 Vol.2006 No.-
The characteristics of heat balance and micrometeorological factors in the different land use (paddy field, upland, park and residential) in urban and suburban Cheongju were compared experimentally during the winter. The mean monthly temperature was found to be the lowest above the upland while above the residential it was the highest. The difference was about 3℃. The paddy field and the upland were large a diurnal temperature range. The characteristic of heat balance above the paddy field and upland was that the division of sensible heat was high during the daytime.
2005년과 2006년 여름철 논의 기온저감효과에 대한 관측
권성일 ( Kwon Sung Ill ),김진수 ( Kim Jin Soo ),박종화 ( Park Jong Hwa ),오광영 ( Oh Kwang Young ),송철민 ( Song Chul Min ),지앙지에 ( Jiang Jie ) 한국농공학회 2007 한국농공학회 학술대회초록집 Vol.2007 No.-
The characteristics of temperature variations under different land covers (paddy field, upland, urban park, and urban residential area) was investigated during two summers (2005 and 2006). The mean temperature generally increased with the distance from edge of paddy fields, being 1.5℃ higher at a 170 m site from paddy fields than at a paddy field area at 22 h. The mean daily temperatures in the study period followed the order of paddy field (25.7℃) < upland (25.9℃) < park (26.4℃) < residential area (26.9℃). The paddy field area has shown remarkable cooling effects compared to the residential area during hot season: Mean duration of temperature below 25℃ in the paddy field area was longer 7.2 hrs than in the residential area; The time to fall to below 25℃ in the paddy field area was sooner 3.7 hr than in the residential area; Mean daily minimum temperature in the paddy field area was much lower 2.7℃ than in the residential area. More research is needed to better clarify the mechanism of cooling effect of a paddy field area by investigating heat balance of a paddy field.
농촌유역의 소하천에서의 지표수와 지하수의 오염물질 농도 비교
송철민 ( Song Chul Min ),김진수 ( Kim Jin Soo ),오광영 ( Oh Kwang Young ),권성일 ( Kwon Sung Ill ) 한국농공학회 2006 한국농공학회 학술대회초록집 Vol.2006 No.-
Pollutants were investigated for surface water, bottom sediment and groundwater in a rural watershed from April to August of 2006. The concentrations of TN and NO<sub>3</sub>-N in ground water were higher than in surface water due to fertilization on cabbage upland neighboring a river. But the concentrations TP and PO<sub>4</sub>-P in groundwater were lower than in surface water. The concentrations of TP and PO<sub>4</sub>-P in surface water was lower than those in bottom sediment. But, TP concentration in the bottom sediment was highest in early June.
오광영 ( Oh Kwang Young ),김진수 ( Kim Jin Soo ),송창섭 ( Song Chang Sub ),권성일 ( Kwon Sung Ill ),송철민 ( Song Chul Min ) 한국농공학회 2006 한국농공학회 학술대회초록집 Vol.2006 No.-
The items of water quality such as water temperature, pH, DO, EC, Cd, As, CN, Hg, Organic phosphates, Pb, Cr<sup>+6</sup>, PCB, ABS, COD, SS, TP and TN were investigated for agricultural reservoirs in Chungbuk. Province. The 35% of study reservoirs was lower than agricultural water quality criteria for pH, 82% for COD, 77% for SS, 19% for TN, and 81% for TP. The other items were met water quality criteria.