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
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]