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The Correlation between the Precipitation considering Critical Infiltration and Groundwater Level in Ssangchun Watershed  

Yang Jeong-Seok (Dept. of Civil Engineering Inje University)
Lim Chang-Hwa (Dept. of Civil Engineering Inje University)
Park Jae-Hyeon (Dept. of Civil Engineering Inje University)
Park Chang-Kun (Dept. of Civil Engineering, Kwandong University)
Jeong Gyo-Cheol (Dept. of Earth and Environmental Sciences, Andong National University)
Publication Information
The Journal of Engineering Geology / v.15, no.3, 2005 , pp. 303-307 More about this Journal
Abstract
Severe drawdown of Groundwater level(CWL) is observed from the analysis of the relationship between precipitation and CWL data during dry seasons in Ssangchun watershed. For Ssangchun watershed, the correlation was the strongest when we apply 70 day Moving Average(MA) for Groundwater dam Operation Index(COI) calculation. To determine the critical infiltration, which is the spatially averaged maximum daily infiltration, a certain value is fixed as the maximum infiltration and precipitation data is modified. COI is recalculated after the data modification and the correlation between COI and GWL is checked. The critical infiltration is determined when the best correlation is obtained after we repeat the above procedure with different fixed values. The critical infiltration is 40m for Ssangchun watershed. The correlation between CWL and COI is higher when we consider critical infiltration than we neglected it.
Keywords
Groundwater dam; Moving average of precipitation; COI; Critical infiltrauon;
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  • Reference
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