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Introduction HOME > FLOOD CONTROL

  • To reduce flood damages, water is retained in the reservoirs and the water level of the rivers are lowered during heavy rainfall season, while in low rainfall season, water in these reservoirs is released to maintain water-plentiful, affluent river.

HYDROGRAPH OF FLOOD CONTROL image
Multi-purpose Dams in Han River Basin
Dam Gross Reservoir
Storage(million ㎥)		 Flood Control
Storage (million ㎥)		 Water level (El.m)
Flood Level Flood Water Levelin Flood Season
Soyanggang 2,900 770 198.0 185.5
Chungju 2,750 616 145.0 138.0
Hwacheon 1,018 213 181.0 175.0
Hwengseung 87 10 180.0 175.0
Sum 6,755 1,609
Success Story
Dam ㎥
Flood Event 		Soyanggang Dam Chungju Dam
Max.
Inflow Rate(㎥/s)		 Outflow Rate
(㎥/s)		 Control
Ratio(%)		 Max.
Inflow Rate(㎥/s)		 Outflow Rate
(㎥/s)		 Control
Ratio(%)
Sept. 11, 1990 10, 650
11th 15:00		 5,675
12th 2:00		 47 22,164
12th 1:00		 14,000
12th 12:00		 37
Aug. 25, 1995 5,624
24th 16:00		 3,532
25th 20:00		 37 10,800
25th 16:00		 8,526
26th 10:00		 21
The higher control ratio means the more successful flood control.