lysimeter

/laɪˈsɪmɪtər/
noun
  1. A device used to measure the amount of water that moves through soil, including rainfall, evaporation, and drainage.
    • The farmer installed a lysimeter in the field to track how much water the crops were using.
    • The lysimeter data showed that the sandy soil drained much faster than the clay soil.
    • Scientists use a lysimeter to study how different soils absorb and release water.