IRDIMS

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We conduct hydrological survey which consists of various measurements; streamflow involving the IRDIMS (Integrated Real-time DIscharge Measurement System), sediment load, soil moisture, and evapotranspiration throughout the all country.

※ Precipitation and water level are measured by MOLIT and groundwater is measured by K-water.

IRDIMS

IRDIMS (Integrated Real-time DIscharge Measurement System) is the real-time and automated streamflow measurement system which produce continuous streamflow using high-tech instruments and equipments; ultrasonic velocity meter, transmission equipments, management software, and etc. Streamflow and velocity are measured based on the ultrasonic doppler shifts in the acoustic doppler velocity meter (ADVM) or the ultrasonic velocity meters (UVM).
Basic Principle
  • ADVM type ultrasonic sensor ADVM type ultrasonic sensor
  • UVM type T/T (Time/Travel) sensor UVM type T/T (Time/Travel) sensor
  • ADVM type ADVM type
  • UVM type UVM type
  • High flow with tidal & sea dike effect High flow with tidal & sea dike effect
  • High flow with large weir effect High flow with large weir effect
  • Low flow with large weir effect Low flow with large weir effect
  • Low flow with tidal effect Low flow with tidal effect
Measurements
Year Han River Nakdong River Geum River Yeongsan River Total
2007 6 1 1 0 8
2008 6 2 2 1 11
2009 7 3 2 1 13
2010 7 4 2 3 16
2011 10 18 3 7 38
2012 12 21 6 7 46
2013 12 22 7 8 49
2014 15 22 7 8 49
2015 16 22 7 10 55
2016 17 23 8 11 59
Recent History of IRDIMS
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