Parameters | Formula | Description | References |
Linear parameter | |||
Hierarchical order (Strahler classification) | Fluvial hierarchy | Establishing the classification of a given body of water and the whole set of the watershed in which it is located. | [2] |
Lr-Length of the main river | Higher-order channel |
| [1] |
Lt-Total length of all channels (km) | Sum of all channels of the basin |
| [1] |
Areal parameter | |||
A-Drainage area (km2) |
| Entire area drained by the set river system. | [7] |
P-Perimeter (km) |
| Measure the two-dimensional contour of the basin | [7] |
L-Basin length (km) |
| Distance measured in a straight line between the mouth and the highest point located along the perimeter. | [7] |
Kc-Coefficient of compactness |
| The compactness coefficient (Kc) associated with the basin form is a circle, and the relationship between the perimeter of the basin and the circumference of a circle of area is equal to that of the basin. | [1] |
F-Basin form |
| Relating to the form shape of a rectangle, corresponding to the ratio between the average length and the axial length of the form. | [7] |
Dd-Drainage density (km∙km−2) |
| The density of the drainage correlates the length of the flow channels with the watershed area. | [1] |
Cm-Maintaining Coefficient |
| This index is intended to provide the minimum area necessary for the maintenance of the one-meter flow channel. | [5] |
Relief parameter | |||
Altimetry amplitude (m) |
| Corresponds to the altimetric difference between the highest and lowest points along the basin. | [5] |
Interfluvial dimension (Horizontal dissection) |
| Distance between channels. | [50] |
Amplitude altimetry (Vertical dissection) |
| Drainage deepening of intensity. | [60] |
Altitude |
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Slope |
| The slope is the angle of inclination of the local surface relative to the horizontal plane. | [51] |
Aspect |
| The slope variation of direction | [51] |