Sediment Load

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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.

Sediment load

Sediment load is measured by the five steps for river management
Procedure

Concentrations of suspended sediment load sample are analyzed by evaporation method or filtration method. For high concentration of sample, evaporation method is appropriate;
for the other case, filtration method is more appropriate.

  • Sample Analysis Methods
  • Sample Analysis Methods
  • Sample Analysis Methods

Sample analysis of suspended sediment load (filtration method)

Particle sizes of suspended sediment load sample are analyzed by various methods; bottom withdrawal tube method, or laser diffraction method.

  • Sample Analysis MethodsBW tube method
  • Sample Analysis MethodsLaser diffraction method

Grain sizes of bed materials are analyzed by sieve analysis method.

Sample Analysis Methods
  • Instruments & Equipments Suspended sediment load sampler
    • Instruments & Equipments BMH-53
    • Instruments & Equipments BMH-60
    • Instruments & Equipments BMH-80
    • Instruments & Equipments BMH-54
    • Dredge sampler Dredge sampler
    • Bed material sampler Bed material sampler
  • Distribution of particle size of suspended sediment load Distribution of particle size of suspended sediment load
  • Cumulative distribution of particle size of suspended sediment load Cumulative distribution of particle size of suspended sediment load
  • Cumulative distribution of grain size of bed materials Cumulative distribution of grain size of bed materials
  • Q-Qs ratings Q-Qs ratings
Measurements
Year Han River Nakdong River Geum River Yeongsan River Total
2009 2 2 1 2 7
2010 4 8 4 4 20
2011 4 9 3 4 20
2012 3 7 2 3 15
2013 4 7 2 2 15
2014 4 10 2 20 26
2015 4 7 3 3 17
2016 3 7 3 3 16
results
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