Estimating evapotranspiration using an inexpensive pan

DOI

Bibliographic Information

Other Title
  • 簡易蒸発皿で蒸発散量を予測
Published
2017-10-31
DOI
  • 10.11275/turfgrass.46.1_51
Publisher
Japanese Society of Turfgrass Science

Search this article

Description

<p>An inexpensive pan was used to estimate ASCE evapotranspiration (ETO). Daily water evaporation from a pan (EPan) and ETO were measured during spring and summer. The spring and summer data were analyzed separately and together. The correlations of EPan and ETO were higher than 0.63, and the intercept from the combined data was −0.54 mm, which is very small considering the turfgrass irrigation. Because of the small value, we ignored the intersection in order to simplify the estimating equation, giving a pan factor (Kp) of 0.89. Considering this, the equations for estimating evapotranspiration using an inexpensive pan were ETC=0.53×EPan for warm-season turfgrass, and ETC=0.71×EPan for cool season turfgrass. If a water balance checkbook is to be created using only a pan, rainfall measurements (Rain) are also necessary. A very high correlation of 0.99 existed between the precipitated volume and the water level in the pan. The equation for estimating rainfall was Rain=0.94×pan water level+0.96. Using this method, it would be possible to estimate the water budget with only an inexpensive pan.</p>

Journal

Details 詳細情報について

  • CRID
    1390006585527957504
  • DOI
    10.11275/turfgrass.46.1_51
  • ISSN
    18844022
    02858800
  • Text Lang
    ja
  • Data Source
    • JaLC
  • Abstract License Flag
    Disallowed

Report a problem

Back to top