It is difficult to quantify ...

It is difficult to quantify such since certain related processes such as

reverberation, transpiration and infiltration processes must be measured or estimated to determine the balance. However, the physical method uses the principal of soil physics to estimate the groundwater recharge rate by measuring the volume of water that passes below the region. In addition, an indirect physical method rely on measurement of soil physical parameters along soil physical principles can be used to measure the potential recharge rate of aquifers/water bearing formation. Such is calculated using numerical method. Using such code in Richards equation to estimate the recharging rate of water bearing formation