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This study evaluated the pattern of groundwater fluctuation in cyrstalline rock using time series and factor analyses. Fromthe results, groundwater level for the 18 wells was classified into 4 types reflecting the hydrogeological properties andrainfall event. Type 1 (DB1-5, DB1-6, DB2-2, KB-10, KB-13) was significantly influenced by groundwater flow throughwater-conducting features, whereas type 2 (DB1-3, DB1-7, KB-1~KB-3, KB-7, KB-11, KB-14, KB-15) was affected byminor fracture network as well as rainfall event. Type 3 (DB1-1, DB1-2) was mainly influenced by surface infiltration ofrainfall event. Type 4 (DB1-8, KB-9) was reflected by the irregular variation of groundwater level caused by anisotropyand heterogeneity of crystalline rock. Key words :Groundwater level, Time series analysis, Factor analysis, Rainfall, Water-conducting features 1.                  (Domenico and Schwartz,1990).              (Meiri, 1985; Barton et al., 1995;Leckenby et al., 2005; Ko et al., 2010). ,     ,             ,        (Kim et al.,2005; Lee et al., 2009a; Lee et al., 2010; Ji andKoh, 2010).           , LPG, LNG        1990    (SKB, 1998; Kimand Jeong, 2002; Park et al., 2008; Moon et al.,2010; Lee et al., 2013). ,                    (Larocque etal., 1998; Lee et al., 2004; Panagopoulos and Lambrakis,2006; Choi and Lee, 2010; Choi et al., 2011; Kimet al., 2012).             ,

Evaluation of Goundwater Flow Pattern at the Site of Crystalline Rock using Time Series and Factor Analyses