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The peak velocity was selected as the velocity close to the peak time for each rainfall event. In case no observed velocity was available at the exact peak time, the nearest value in the rising limb was selected as the peak velocity. This velocity data could also be obtained from the WAMIS (www.wamis.go.kr), as well as from the Korea Annual Hydrological Report. The number of events considered in this study varies greatly by basin from 3 to 22, and the total number of events considered is 162. Table 1 compares the number of rainfall events considered for each basin, including some basic information about the study basins.

Table 1

Basin characteristics and the number of rainfall events considered in this study

#StationArea (km2)Length (km)Shape factorChannel slope (m/m)# of events
Imokjeonggyo 55.9 16.6 0.202 0.0079 
Sachogyo 86.0 19.3 0.231 0.0169 
Jangpyeonggyo 104.8 26.0 0.155 0.0152 
Baekokpogyo 143.9 23.0 0.272 0.0143 
Songgyegyo 157.4 14.5 0.750 0.0101 
Anheunggyo 191.1 31.8 0.189 0.0050 
Songcheongyo 349.5 62.8 0.089 0.0089 
Sunaegyo 392.9 44.2 0.201 0.0086 10 
Najeongyo 452.6 59.1 0.130 0.0081 
10 Okdonggyo 482.6 46.0 0.228 0.0134 
11 Sangbangrimgyo 527.2 51.9 0.196 0.0077 11 
12 Jucheongyo 533.2 71.0 0.106 0.0043 
13 Sincheongyo 599.4 84.1 0.085 0.0041 
14 Pyeongchanggyo 695.7 74.8 0.124 0.0061 11 
15 Panungyo 806.8 90.3 0.099 0.0049 22 
16 Bukssangri 1,615.8 125.7 0.102 0.0038 15 
17 Jeongseonje1gyo 1,688.4 103.5 0.158 0.0051 
18 Palgoegyo 1,764.1 138.2 0.092 0.0044 
19 Geoungyo 2,272.7 167.4 0.081 0.0047 
20 Yeongwoldaegyo 2,440.4 186.5 0.070 0.0034 10 
21 Osari 4,690.0 189.1 0.131 0.0031 11 
#StationArea (km2)Length (km)Shape factorChannel slope (m/m)# of events
Imokjeonggyo 55.9 16.6 0.202 0.0079 
Sachogyo 86.0 19.3 0.231 0.0169 
Jangpyeonggyo 104.8 26.0 0.155 0.0152 
Baekokpogyo 143.9 23.0 0.272 0.0143 
Songgyegyo 157.4 14.5 0.750 0.0101 
Anheunggyo 191.1 31.8 0.189 0.0050 
Songcheongyo 349.5 62.8 0.089 0.0089 
Sunaegyo 392.9 44.2 0.201 0.0086 10 
Najeongyo 452.6 59.1 0.130 0.0081 
10 Okdonggyo 482.6 46.0 0.228 0.0134 
11 Sangbangrimgyo 527.2 51.9 0.196 0.0077 11 
12 Jucheongyo 533.2 71.0 0.106 0.0043 
13 Sincheongyo 599.4 84.1 0.085 0.0041 
14 Pyeongchanggyo 695.7 74.8 0.124 0.0061 11 
15 Panungyo 806.8 90.3 0.099 0.0049 22 
16 Bukssangri 1,615.8 125.7 0.102 0.0038 15 
17 Jeongseonje1gyo 1,688.4 103.5 0.158 0.0051 
18 Palgoegyo 1,764.1 138.2 0.092 0.0044 
19 Geoungyo 2,272.7 167.4 0.081 0.0047 
20 Yeongwoldaegyo 2,440.4 186.5 0.070 0.0034 10 
21 Osari 4,690.0 189.1 0.131 0.0031 11 

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