• evapotranspiration
  • Discharge of water from the earth's surface to the atmosphere by evaporation from lakes, streams and soil surfaces and by transpiration from plants. Also known as fly-off.
Abstract from DBPedia
    Evapotranspiration (ET) is a term used to refer to the combined processes by which water moves from the earth’s surface into the atmosphere. It covers both water evaporation (movement of water to the air directly from soil, canopies, and water bodies) and transpiration (movement of water from the soil, through roots and bodies of vegetation, on leaves and then into the air). Evapotranspiration is an important part of the local water cycle and climate, as well as measurement of it plays a key role in agricultural irrigation and water resource management.

    蒸発散(じょうはっさん, evapotranspiration)とは、蒸発(evaporation)と蒸散(transpiration)を合わせたもの。地球上の水循環の中の1つ。 植物表面からの蒸散は植物学・生物学的な意味合いが大きい一方、蒸発は水文学的な意味が大きい。ただ、蒸発だけでは水文学上の水収支を正確に表すことができないため、両者を足した蒸発散が、地表面から大気へ放出される水として定義されている。計算上、蒸発量と蒸散量を区別して算出するよりもまとめて算出した方が良い場合もあるため、蒸発散量を用いることも多い。

    (Source: http://dbpedia.org/resource/Evapotranspiration)