An Investigation of Fractional One-Dimensional Groundwater Recharge by Spreading Using an Efficient Analytical Technique

In the present work, the q-homotopy analysis transform method (q-HATM) was used to gen-erate an analytical solution for the moisture content distribution in a one-dimensional vertical ground-water recharge problem. Three scenarios for the Brooks–Corey model are studied based on linear and nonlinear diffusivity and conductivity functions. The governing nonlinear fractional partial differential equations are solved effectively by the combination of a hybrid analytical technique, which is the combination of the q-homotopy analysis method and the Laplace transform method. Figures and tables are used to discuss the outcomes for fractional values of the time derivative. Mathematica software is used to plot the figures. The examples used in this paper demonstrate the accuracy and competence of the considered algorithm. The acquired results demonstrate the efficiency and reliability of the pro-jected scheme and are also suitable to carry out the highly nonlinear complex problems in a real-world scenario. © 2022 by the authors. Licensee MDPI, Basel, Switzerland.