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최중대,최예환,Choi Joong-Dae,Choi Ye-Hwan 한국관개배수위원회 2002 한국관개배수논문집 Vol.9 No.2
Return flow rate of agricultural irrigation for rice culture was investigated in the North Han river basin, Two small paddy watersheds were chosen and irrigation, drainage, infiltration and evapotranspiration were monitored and estimated during the irriga
최중대,권순국,권기석,Choi, Joong-Dae,Kwun, Soon-Kuk,Kwon, Gi-Seok 한국농공학회 2004 한국농공학회논문집 Vol.46 No.2
NPS pollutant loads from sandy clayey and clayey loam runoff plots were measured. Runoff plots were 2$\times$10 m in size and 8~10% in slope and paddy area was 4,620 $m^2$. Soybean, corn, tobacco and control (natural weed) were cultured. Precipitation during the growing season of June to October, 2002 was 869.5 mm. Runoff and water quality were measured more than 10 times during the measurements depending on the growing stage. Pollutants loads were estimated by using respective concentration and runoff volume. Runoff occurred when daily rainfall exceeded about 30 mm. The largest runoff was observed from the paddy but pollutant loads were larger from upland crops than those from paddy. SS loads from paddy and upland were 1.4 ton/ha/yr and 3.1~4.3 ton/ha/yr, respectively. COD loads 30 kg/ha/yr and 66~90 kg/ha/yr, T-N loads 13 kg/ha/yr and 14~23 kg/ha/yr, T-P loads 1 kg/ha/yr와 4 kg/ha/yr, nitrate nitrogen loads 1 kg/ha/yr and 4~8 kg/ha/yr, and phosphate phosphorus loads 0 kg/ha/yr and 4~6 kg/ha/yr, respectively. It was concluded that NPS pollutant loads from upland crop culture have greater impact on the quality of the receiving water body than those from paddy culture.
최중대,최예환,이찬만,Choi Joong-dae,Choi Ye-hwan,Lee Chan-man 한국관개배수위원회 1997 한국관개배수논문집 Vol.4 No.2
Flow rate and selected water quality of 2 small rural streams located in Kangwon-do, Korea, were monitored and land use of the watersheds was investigated to describe the trend of stream water quality for 2 years. Water qualities were analyzed with respec
북한강 수계 충적평야 지역 토지이용과 지하수 수질간의 관계
최중대,류순호,Choi Joong-dae,Ryu Soon-ho 한국관개배수위원회 2000 한국관개배수논문집 Vol.7 No.2
The effect of land use of an alluvial watershed in the upper North Han river basin on groundwater quality were investigated. Existing 20 farm wells were selected as monitoring wells representing different land uses of residential, arable(paddy and field),
최중대,Choi Joong-dae 한국관개배수위원회 1996 한국관개배수논문집 Vol.3 No.2
Lake Soyang, the largest man-made lake in Korea, has been experiencing water quality degradation because of excessive nutrient loads from the watershed. Objective of this paper is to describe land uses in and TP and TN loading characteristics from the lak