Calculation method for underground water critical depth on condition of phreatic evaporation

Calculation method for underground water critical depth on condition of phreatic evaporation

  • CN 105,005,687 A
  • Filed: 07/02/2015
  • Published: 10/28/2015
  • Est. Priority Date: 07/02/2015
  • Status: Active Grant
First Claim
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1. the computing method of critical depth of groundwater under an evaporation from phreatic water condition, it is characterized in that:

  • these computing method, based on the computing method of the one dimension homogeneous soil steady state evaporation model of Mualem-Van Genuchten characteristic curve of soil moisture equation and Gardner, comprise the following steps;

    Step 1, the area determining survey region and calculation interval;

    Step 2, determine the parameter of the Mualem-Van Genuchten characteristic curve of soil moisture equation of survey region;

    With the Mualem-Van Genuchten characteristic curve of soil moisture equation of parameter l such as formula (1) and (2),K(h)=

    K sΘ

    l[1-(1-Θ

    1/m) m] 2. (1)

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