Depletion usually results in deterioration of the IPR ([[:file:fundamentals-of-fluid-flow_fig6.png|Figure 6]]). These changes can be predicted quantitatively by calculating the changes of the characteristic constants: ''j'', ''c'', ''q''<sub>ax</sub> ''A'', and ''B''. The exponent ''n'' does not change with depletion. If subscript ''p'' denotes the present depletion state and subscript ''f'' a future state, the present and future characteristic factors are related as follows: | Depletion usually results in deterioration of the IPR ([[:file:fundamentals-of-fluid-flow_fig6.png|Figure 6]]). These changes can be predicted quantitatively by calculating the changes of the characteristic constants: ''j'', ''c'', ''q''<sub>ax</sub> ''A'', and ''B''. The exponent ''n'' does not change with depletion. If subscript ''p'' denotes the present depletion state and subscript ''f'' a future state, the present and future characteristic factors are related as follows: |