• BLANEY-CRIDDLE will calculate daily and monthly reference crop evapotranspiration (ETo) and crop evapotranspiration (ETc) by the Blaney-Criddle method.

  • The input data is:   mean [monthly] temperature (oC), the given month, latitude (degrees), hemisphere (North or South), actual insolation time (a fraction between 0.0 and 1.0), minimum relative humidity (%), daytime wind speed at 2-m depth (m/s), and crop type (a choice among thirty common crop types).

  • The output data is:  ETo (cm), monthly ETo (cm), daily ETc (cm), and monthly ETc (cm).

  • To calculate ETc, the crop coefficient kc is set at the midrange value of Table 2-5 in the text "Engineering Hydrology, Principles and Practices."

  • Allowable input data ranges:   Temperature is restricted in the range 0-40 degree Celsius; latitude in the range 0-60o; actual insolation time in the range 0.0-1.0; minimum relative humidity in the range 0-100%; daytime wind speed velocity at 2-m depth in the range 0-10 m/s. Input values outside of these ranges will cause the respective value to reset to the closest limit (Example: entering 12 for daytime wind speed will cause its value to reset to 10).

Click  -here- to view a sample data set.

RUN!

DISCLAIMER: The developer makes no warranties, expressed or implied, concerning the accuracy, completeness, reliability, or suitability of this program for any one particular purpose. It is understood that the user proceeds at his/her own risk.