Numerical study of various processes leads to the need clarification (extensions) limits applicability computational constructs and modeling tools. For dynamical systems, this question may be related with a generalization concept derivative, which keeps used constructions relevant. In article we introduce weak local differentiability in space Lebesgue integrable functions consider consistency s...

introduction groundwater resources in arid-semiarid zones universally suffer from problems of over-abstraction and declining water tables. in addition to the issues related to quantity, degradation of groundwater quality now assumes major importance in the arid and semiarid regions. in such areas, natural factors such as the low precipitation, combined with high evapotranspiration, result in hi...