Abstract
This study analyzed the characteristics of daily flow data for eight multipurpose dams in the Korean Peninsula. According to theresults of the peak flow analysis, occurrence frequencies of peak flow in six multipurpose dams tend to increase statistically sig-nificantly. In particular, according to the analysis, Sumjin River’s dam basin shows the tendency of increase in all the four indices(magnitude, timing, frequency, and duration), which implies that it suffers the biggest ecological stress than the other dam basins.According to the results of trend analysis on 7-day low flow, Sumjin River dam shows the tendency of increase in dam inflow whileAndong dam and Chungju dam indicatea statistically significant pattern of decrease. Typology analysis on the upper and lower quar-tiles shows that the increase of the upper quartile only occurs intermittently in July to August and September to October in Soyangdam or Chungju dam. The tendency of decrease in either the upper or lower quartile only occurs in turn from November to Decem-ber, January to March, March to May, and May to July. In addition, Seomjin River dam (May to December, January) and Daecheongdam (January to March, March to July) show the tendency of increase in the lower quartile only.Key words : Multi-purpose dam, Hydrologic variability, Trend, Typology analysis
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