Parameters

Formulae

References

Stream order (U)

Hierarchical rank of streams

[22]

Stream length (L_u)

Length of the stream

[23]

Mean stream length (L_sm)

L_sm = L_u/N_u where: L_sm = mean stream length, L_u = total stream length of order “U”, N_u = total no. of stream segments of order “U”

[22]

Stream length ratio (R_L)

R_L = L_u/(L_u − 1) where, R_L = stream length ratio, L_u = the total stream length of the order “U”, L_u − 1 = the total stream length of its next lower order

[23]

Bifurcation ratio (R_b)

R_b = N_u/N_u + 1 where, R_b = bifurcation ratio, N_u = total number of stream segments of order “U”, N_u + 1 = number of segments of the next higher order

[24]

Mean bifurcation ratio (R_bm)

R_bm = average of bifurcation ratios of all order

[25]

Stream frequency (F_s)

F_s = N_u/A where, F_s = stream frequency, N_u = total no. of streams of all orders, A = area of basin

[23]

Drainage texture (T)

T = D_d × F_s where, T = Drainage texture, D_d = drainage density, F_s = stream frequency

[26]

Drainage density (D_d)

D_d = L_u/A where, D_d = drainage density, L_u = total stream length of all orders, A = area of basin

[23]

Circularity ratio (R_c)

R_c = 4πA/P² where, R_c = circularity ratio, pi = pi value, A = area of basin, P² = square of the perimeter

[22]

Elongation ratio (R_e)

where, R_c = circularity ratio, A = area of basin pi = pi value, L_b = basin length

[25]

Form factor (F_f)

F_f = A/L² where, F_f = form factor, A = area of basin (km), = square of the basin length

[23]

Relief

R = H − h where, R = relief, H = Vertical distance of the lowest highest points = Vertical distance of the lowest points of watershed in (m)

[27]

Relief ratio

R_h = H/L_b where, R_h = relief ratio, H = total relief of the basin in km, L_b = basin length

[28]

Length of overland flow (Lg)

Lg = 1 D_d × 2 where, Lg = length of overland flow, D_d = drainage density

[23]