Fig. 1 Schematic diagram of the study area and the locations of instruments for measurement of water balance(Choi et al., 2015)
Fig. 3 The representative runoff ratio and EMCs by estimated NIER method
Fig. 4 Unit load of water quality constituents determinated by NIER and r_NIER method and applied rainfall periods(rainfall period 1 : 1981-1990; rainfall period 2 : 1991-2000; rainfall period 3: 2001-2010)
Fig. 2 (a) A comparison of NIER and r_NIER methods for BOD unit load. (b) Difference of BOD unit load (△ unit load = |NIER unit load - r_NIER unit load|) was affected by RMSE (root mean square error) of event mean concentration by rainfall level (EMCy) and (c) that of runoff ratio by rainfall level (Ry) but (d) was not affected by that of rainfall ratio by rainfall level
Table 1 The variation of rainfall and rainfall factor by rainfall application periods
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