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A Study of Comparison of outflow characteristics of pollutants by rainfall event of forest area near Juam lake basin  

Kim, Nam-Joung (Graduate School of Environmental Engineering, Chosun University)
Shin, Dae-Yewn (Graduate School of Environmental Engineering, Chosun University)
Publication Information
Journal of environmental and Sanitary engineering / v.22, no.4, 2007 , pp. 87-104 More about this Journal
Abstract
The objective of this study is to estimate the load of pollutants caused from the forest area among non-point pollutants within the Juam lake. The surveyed forest area was classified into broad-leaved, conifer, mixed and herbage area by forest tree type. Water quality and flux were investigated under rainfall and non-rainfall, respectively. Then, pollutant loading was evaluated by using the values of unit pollutant loading factor of each point and area of forest zone. Water quality analysis results of runoff by forest tree types were as follows. - Annual BOD, $COD_{Mn}\;and\;COD_{Cr}$ concentration of runoff in conifer area was high, and particle and biological recalcitrant compounds were flowed highly. - SS, T-N and T-P concentration was high in runoff from broad-leaved area, and biological degradable compounds was flowed. - Water quality of water from valley was maintained good under non-rainfall and could be utilized as fresh drinking water. Through water quality standard investigation, a countermeasure establishment was necessary to secure a good quality of drinking water - BOD, $COD_{Mn},\;and\;COD_{Cr}$ concentration of Bo-sung river was higher 1.5 times than other 2 streams, and because of high T-N, and T-P concentration in Songgwang stream, the management for this was necessary.
Keywords
Run off; Rain fall event; Juam lake;
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