Symbol
Morphometric parameters
Description/formula
References
A
Area of the basin (km2)
Area is delimited by the water divide
P
Perimeter of the basin (km)
Length of the horizontal projection of the divide
Max elevation of the basin (m)
The maximum altitude of a basin
The elevation of the outlet (m)
The minimum altitude of a basin
Total length of channels within the drainage basin (km)
The stream length was computed based on the law proposed by Horton
[16]
Total length of 20 m contour lines within the drainage basin (km)
The sum of the 20m contours' length that cross the drainage basin area
[17]
Sl
Slope of the basin
[17]
D
Drainage density
[16]
R
Relief of the basin (m)
[18]
Hdiv.mean
The mean elevation of the divide (m)
From averaging the elevations of the divide
[19]
Hcentr
The elevation of the centroid (m)
Centroid placed with the center of gravity method
Llfp
The length of the longest flow path in the basin (km)
Basin length is estimated as the longest dimension of the basin parallel to the principal drainage line
[20]
Sllfp
Slope of the longest flow path
Elevation difference along the main channel
[20]
M
Meltons’ ruggedness number
[21] [22]
Circ
Circularity of the basin
[23]
Elong
Elongation of the basin
[20]
Comp.
Compactness factor
[24]
Rratio
Relief ratio
[20]
Rgd
An index of ruggedness
[25]
R2
Another expression of relief
Rratio2
Another expression of relief ratio
Rgd2
Another expression of ruggedness
