Morphometric Parameters

Formula

References

Basic Parameters

Area of Basin (A) Perimeter of Basin (P)

Plan area of the watershed (km²)

GIS

Software analysis

[36]

Perimeter of watershed (km)

[36]

Stream Order (u)

Hierarchical rank

[36]

Basin Length (L_b)

Length of basin (km)/GIS software analysis

[34] [35] [41]

L_b = 1.321 × A^0.568a

[17]

Stream Length (L_u)

Length of the stream (km)

[36]

Linear Parameters

Bifurcation Ratio (R_b)

Rb = N_u/N_u + 1, where

[37]

N_u + 1 = no. of segments of the next higher order

Drainage Density (D_d) (km/km²)

D_d = L_u/A, Where

[36]

L_u + total stream length of all orders (km)

A = area of the watershed (km²)

Stream Frequency(F_u) (no./km²)

F_u = N_u/A, where

[36]

N_u = total no. of steams of all orders

A = area of the basin(km²)

Texture Ratio (T) (no./km²)

T = N_u/P, where

[36]

N_u = total no. of streams of all orders

P = perimeter (km)

Length of Overland Flow (km) L_o

L_o = ½ Dd, where

[36]

D_d = drainage density

Shape parameters

Form Factor (R_f)

R_f = A/L_b², where

[36]

A = area of the basin (km²)

L_b = basin length (km)

Shape Factor (B_s)

B_s = L_b²/A, where

[17]

L_b = basin length (km)

A = area of the basin (km²)

Elongation Ratio (R_e)

Re = 1.128, where,

[37]

A = area of the basin (km²)

L_b = basin length (km)

Compactness Coefficient (C_c)

, where

[36]

P = perimeter of the basin (km)

A = area of the basin (km²)

Circularity Ratio (R_c)

R_c = 4 × ᴨ × A/P², where ᴨ = 3.14

[38]

A = area of the basin (km²)

P = perimeter (km)