Trend Analysis of Water Pollutant at Summer Rainfall Season

Youngshin Lee, Sanghee Shin

Department of Environmental Engineering, Hanseo University, Seosan-Si, Republic of Korea.
Geotechnical Engineering Research Division, Korea Institute of Construction Technology, Goyang-Si, Republic of Korea.

DOI: 10.4236/jep.2014.54026                

Abstract

This study, with Hongdong Reservoir, is intended to evaluate the changes in water quality in the lake before and after rainfall in summer. Various non-point source pollutions are scattered around the reservoir, and to determine the pollution level by pollution source, samples were taken at the same point before rainfall (1st), during rainfall (2nd) and after rainfall (3rd) and concentration was measured. Pollutant concentration curve at the measuring points (HDS1, HDS2, HDS3) appeared to be similar with the hydrological curve. When comparing the concentration immediately before rainfall with event mean concentration (EMC), SS and COD were 4 - 59 times and 1 - 4 times, respectively. However, when it comes to total nitrogen (T-N), concentration arrived at the reservoir stayed the range of 1.3 - 12.0 mg/L in all 3 cases without significant variation, which indicated that total nitrogen load is critical when arriving at the reservoir, irrespective of rainfall, and thus it’s necessary to consider non-point source pollution runoff also in addition to point source pollution when developing the water quality improvement measures in reservoir.

Keywords

Rainfall Event; Reservoir Control; Water Pollution; Nutrients; Non-Point Pollution Source

Conflicts of Interest

The authors declare no conflicts of interest.

References

[1]	Kwon, S.K. (1998) Management Improvement and Perspective on Nonpoint Sources of Water Pollution. Korean Society of Environmental Engineers, 20, 1497-1510.
[2]	Lee, Y.S. and Shin, S.H. (2013) Effective Reservoir Management Methods Using Nutrients Leaching Characteristic Analysis: Case Study of the Hongdong Reservoir. The Journal of Engineering Geology, 23, 95-104. http://dx.doi.org/10.9720/kseg.2013.2.95
[3]	Fulcher, G.A. (1994) Urban Storm Water Quality from a Residential Catchment. The Science of the Total Environment, 146-147, 535-542. http://dx.doi.org/10.1016/0048-9697(94)90279-8
[4]	Pegram, G.C., Quibell, G. and Hinsch, M. (1999) The Nonpoint Source Impacts of Peri-Urban Settlements in South Africa: Implications for Their Management. Water Science Technology, 39, 283-290. http://dx.doi.org/10.1016/S0273-1223(99)00345-5
[5]	Qin, H.P., Khu, S.T. and Yu, X.Y. (2010) Spatial Variations of Storm Runoff Pollution and Their Correlation with Land-Use in a Rapidly Urbanizing Catchment in China. Science of the Total Environment, 408, 4613-4623. http://dx.doi.org/10.1016/j.scitotenv.2010.07.021
[6]	Park, B.H. (2000) Analyse of Water Purification Techniques and Their Applicability in Lakes and Reservoirs Using a Water Quality Model. Seoul National University, Seoul, 152.
[7]	Ministry of Environment (2004) Standard Methods. No. 2004-188 of the Ministry of Environment, 1205.
[8]	National Institute of Environmental Research (2006) Evaluation of Non-Point Sources Loadings (1)-Impervious Land No. 2006-34-816 of National Institute of Environmental Research, 103.