| Symbols | MEANINGS | Units |
| Lu | The thickness of the useful cracked horizon | m |
| QLu | The flow rate of this useful fissured horizon | m3/s |
| Qpl | The flow rate of the useful fissured medium | m2/s |
| Q/P’ | the instantaneous linear flow | m2/s |
| Nf | The number of boreholes | unitless |
|
| Porosity of fractures and connected pores | unitless |
| Ce | Water compressibility coefficient | m3/m3/bar |
| Cma | Matrix compressibility coefficient. | m3/m3/bar |
| T | Transmissivity | m2/s |
| s’ | Continuation of the recording of the drawdown in the control piezometer | m |
| Q | Pumping flow rate value that created the initial drawdown | m3/s |
| t | Time elapsed from the start of pumping until it stops | s |
| t’ | Time counted after this stop | s |
| S | The storage coefficient | unitless |
| e | The thickness of the aquifer | m |
|
| Density of water | kg/m3 |
| g | gravitational acceleration | m/s2 |
| K | The Hydraulic conductivity | m/s |
| Np | The piezometric level referring to the edge of the casing | m |
| ZTN | The altitude of the natural terrain at the location of the structure | m |
| Nmesure | The depth of the water surface measured with the probe | m |
| Hd | The height (m) of the casing above ground | m |
| RMSE | Root Mean Square Error | unitless |
|
| The mean | unitless |
|
| standard deviation | unitless |
| I | The index of Nash | unitless |
| R | Correlation coefficient | unitless |
| ETP | Potential evapotranspiration | mm |
| ETR | The real evapotranspiration | mm |
| RFU | The reserve easily usable | mm |
| R | Runoff | mm |
| P | Average annual precipitation | mm |
| I | Infiltration | mm |
| ∆S | Change in water stock | mm |