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Present condition

Precipitation

  • Annual average precipitation : 1274.85mm (2007 ~ 2016)
  • 68 % of annual precipitation occurs during summer season from June to September
  • Varies considerably with time and space
    • Yearly rainfall appears in large deviations from the lowest of 754 mm(in 1939) to the highest of 1,756 mm (in 2003)
  • Water use
    • Total amount of water resources : 132.3 billion ㎥
    • Annual water use : 37.2 billion ㎥
    Water resource of Korea Annual Rainfall in Korea

    Ministry of Land, Infrastructure, and Transport 「Water Vision 2020」

Groundwater Use

  • Groundwater use in 2016 : about 4.1billion ㎥/year
  • Number of wells in 2016 : about 1,656 thousand

    Groundwater use of Korea

Aquifer characteristics

Hydrogedogical Map of Korea

Unconsolidated aquifer
  • Widely distributed near main rivers
  • Distribution area : 27% of Korea (27,390 ㎢)
  • Thickness : 2~30 m(mostly 10~15 m)
  • Well yield : 30~800 ㎥/day (5.5~150 gpm)
Bedrock aquifer
  • Hydraulic properties are primarily controlled by
    • the secondary interstices such as
    • fractures and faults because most rocks
    • consist of crystalline rocks.
  • Well yield : 10 to 5,000 ㎥/day (2~910 gpm)