Skip to main content

Posts

Showing posts with the label Groundwater Recharge

Groundwater Hydrology: Managed Aquifer Recharge (MAR) and Infiltration Basin Hydraulics

Managed Aquifer Recharge (MAR) enhances groundwater storage by directing surface water into aquifers. For surface infiltration basins, the steady-state percolation rate (q) through an unsaturated soil layer into an unconfined water table is governed by Hantush’s Infiltration Equation: $h_m^2 - h_0^2 = \frac{v_0}{K} \cdot \left[ \frac{W^2}{2} + \frac{L^2}{2} \right] \cdot f(t)$ ​Where $h_m$ is maximum water table mound height, $h_0$ is initial water table depth, $v_0$ is constant percolation rate, $K$ is horizontal hydraulic conductivity, $W$ and $L$ are basin width and length, and $f(t)$ is a dimensionless time function. ​Clogging of the basin floor due to suspended solids deposition decreases hydraulic conductivity over time, which is modeled as an exponential decay function: $K_t = K_0 \cdot e^{-\alpha \cdot t}$ ​Where $K_0$ is initial hydraulic conductivity and $\alpha$ is a site-specific clogging factor. ​Under the Atal Bhujal Yojana, over-exploited groundwater blocks across Gujara...