Groundwater energy balance

The groundwater energy balance is the energy balance of a groundwater body in terms of incoming hydraulic energy associated with groundwater inflow into the body, energy associated with the outflow, energy conversion into heat due to friction of flow, and the resulting change of energy status and groundwater level. == Theory == When multiplying the horizontal velocity of groundwater (dimension, for example, m 3 / day {\displaystyle m^{3}/{\text{day}}} per m 2 {\displaystyle m^{2}} cross-sectional area) with the groundwater potential (dimension energy per volume of water, or E / m 3 {\displaystyle E/m^{3}} ) one obtains an energy flow (flux) in E / day {\displaystyle E/{\text{day}}} for the given flow and cross-sectional area.

Source: Wikipedia — Groundwater energy balance (CC BY-SA 4.0)