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Loading Characteristics of Non-Point Source Pollutants by Rainfall - Case Study with Cherry Tree Plot -  

Kang, Mee-A (Department of Environmental Engineering, Andong National University)
Choi, Byoung-Woo (Department of Environmental Engineering, Andong National University)
Yu, Jae-Jeong (Nakdong River Water Quality Research Center, National Institute of Environmental Research)
Publication Information
The Journal of Engineering Geology / v.20, no.4, 2010 , pp. 401-407 More about this Journal
Abstract
This study was carried out to produce the characteristics of pollutant loads caused by a cherry tree plot as a nonpoint sources(NPS) unit in agricultural areas. The relationship between rainfall and runoff didn't show a good coefficient with 0.5. Despite precipitation amount was less than 20 mm, runoff occurred with $0.5\;m^3$ because of high rainfall intensity of 8.8 mm/hr. In contrast, runoff was not occurred when precipitation amount was 47.4 mm in one case. In that case the primal effect on runoff was not precipitation amount. Correlation between load of pollutants such as BOD, COD, TN and TP and runoff' volumes showed significantly positive values which were more than r = 0.92 for all pollutants except SS(r = 0.71). SS could be a proper factor for estimating pollutant loads of BOD, COD, TN and TP because of a high correlation more than r = 0.73 between SS load and pollutant loads of BOD, COD, TN and TP. Both Organics and nutrient pollutants could be reduced if we control SS in runoff. The highest concentration of TN was detected in the event which was affected by fertilization activities directly. Therefore fertilization must be considered as a function of impact parameters on TN load in agricultural areas.
Keywords
NPS (Non-point source); runoff; load; nitrate; nitrogen compounds;
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Times Cited By KSCI : 4  (Citation Analysis)
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