|
KMID : 1024520120210010031
|
|
Journal of the Environmental Sciences
2012 Volume.21 No. 1 p.31 ~ p.39
|
|
|
Estimation of Pollutant Load Delivery Ratio for Flow Duration Using L-Q Equation from the Oenam-cheon watershed in Juam Lake
|
|
Choi Dong-Ho
Jung Jae-Woon
Lee, Kyoung-Sook
Choi Yu-Jin
Yoon Kwang-Sik
Cho So-Hyun
Park Ha-Na
Lim Byung-Jin
Chang Nam-Ik
|
|
|
Abstract
|
|
|
|
he objective of this study is to provide pollutant loads delivery ratio for flow duration in Oenam-cheon watershed, which is upstream watershed of Juam Lake. To calculate the delivery ratio by flow duration, rating curves and discharge-loads curves using measured data were established, then Flow Duration Curve(FDC) and pollutant loads delivery ratio curves were constructed. The results show that the delivery ratios for BOD 5 for abundant flow(Q 95 ), ordinary flow(Q 185 ), low flow(Q 275 ), and drought flow(Q 355 ) were 23.9, 12.7, 7.1, and 2.9%, respectively. The delivery ratios of same flow regime for T-N were 58.4, 31.2, 17.2 and 7.1%, respectively. While, the delivery ratios T-P were 17.3, 7.5, 3.4, and 1.1% respectively. In general, delivery ratio of high flow condition showed higher value due to the influence of nonpoint source pollution. Based on the study results, generalized equations were developed for delivery ratio and discharge per unit area, which could be used for ungaged watershed with similar pollution sources.
|
|
|
KEYWORD
|
|
|
BOD 5 , Delivery ratio, Flow duration, Pollutant load, T-N, T-P
|
|
|
FullTexts / Linksout information
|
|
|
|
|
|
Listed journal information
|
|
|
|