| Correlation Analysis on the Runoff Pollutants from a
Small Plot Unit in an Agricultural Area |
| Meea Kang1†, Byoungwoo Choi1, and Jae-Kwan Lee2 |
1Department of Environmental Engineering, Andong National University, 388, Songchon, Andong, Gyungbuk, 760-749, South Korea
2Nakdong River Environment Research Center, National Institute of Environmental Research, 239-3, Pyongree, Goryoung, Gyungbuk, 717-870, South Korea |
Corresponding Author:
Meea Kang ,Tel: +82-54-820-6267, Fax: +82-54-820-6267, Email: yukimeea@hanmail.net
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Received: September 24, 2010; Accepted: November 5, 2010. |
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| ABSTRACT |
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This study was carried out to investigate the important factors relating to runoff and pollutant loads in a plot unit located in an
agricultural area. Of the precipitation parameters, such as total precipitation, days since last rainfall (ADD, the rainfall was more than
10mm) and average rainfall intensity on runoff, the strongest effect was obtained due to total precipitation, but the rainfall intensity
showed a slightly positive correlation. It was expected that both variables, i.e. total precipitation and rainfall intensity, would lead to the
generation of greater runoff. In contrast, runoff was negatively correlated with ADD, which is understandable because more infiltration
and less runoff would be expected after a long dry period. The TSS load varied greatly, between 75.6 and 5.18 x 104 g, per event. With
the exception of TN, the TSS, BOD, COD and TP loads were affected by runoff. The correlations of these items were proportional to the
runoff volume, with correlation coefficients (r) greater than 0.70, which are suitable for use as NPS model data. The TSS load showed
very good relationships with organics (BOD & COD) and nutrients (TN & TP), with correlation coefficients greater than 0.79. Therefore,
the removal of TSS is a promising factor for protecting water basins. |
| Keywords:
Non-point source | Pollutant load | Runoff | Precipitation |
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