Then not only the problem of queer dot at the well bore is avoided, but also the radius of influence domain (R) of the depression cone is convenient to deduce.

The result shows that with the same AS pressure and airflow rate, the greater the AS well depth, the greater the radius of influence(ROI), but the air distribution concen.

The misunderstood "Dupuit stable well flow model" ("model of radius of influence") is the main "theoretical" basis of the unreasonable selection of exploited horizon of groundwater.