Further Discussion on the Influence Radius of a Pumping Well: A Parameter with Little Scientific and Practical Significance That Can Easily Be Misleading

To facilitate understanding and calculation, hydrogeologists have introduced the influence radius. This parameter is now widely used, not only in theoretical calculation reasoning of well flow mechanics, but also guiding production practice, it has become an essential hydrogeology. However, reasonableness this always been disputed. paper discusses nature radius problems its practical application based on mathematical analogy starting from Dupuit formula Thiem formula. It found that essentially distance time–distance problem physics; therefore, a function time velocity influenced by hydrogeological conditions pumping conditions. Additionally, variable different parameters reflecting natural properties aquifers such as porosity, specific yield, hydraulic conductivity. Furthermore, parameterized violates continuity principle fluids. In reality, there are no infinite horizontal aquifers, most replenished external sources, which very theory. The stable or seemingly groundwater level observed practice simply coincidence occurs under various factors, cannot be considered to explain rationality applying calculations. Therefore, used evaluate sustainable water supply capacity nor can guide design pollution remediation projects, division source protection areas, scheme riverbank filtration wells. Various ecological environmental caused exploitation related misleading information Generally, does scientific significance, easily misleading, particularly for non-professionals. should development resources, let alone models. From perspective regional overall planning, evaluation utilization resources investigated systematic manner.