Sl. No.

Morphometric Parameters

Formulae

Reference

Linear Parameters

1.

Stream Order

Hierarchical Rank

[18]

2.

Stream Length (Lu)

Length of the stream

[3]

3.

Bifurcation Ratio (Rb)

Rb = Nu/Nu + 1

where, Rb = Bifurcation Ratio;

Nu = Total no. of stream segments of order “u”;

Nu + 1 = Number of segments of the next higher order

[19]

4.

Mean Bifurcation Ratio (Rbm)

Rbm = Average of bifurcation ratios of all orders

[20]

Areal Parameters

5.

Drainage Density (Dd)

Dd = Lu/A

Where, Dd = Drainage density;

Lu = Total stream length of all orders A = Area of the basin (km²)

[21]

6.

Stream Frequency (Fs)

Fs = Nu/A

Where, Fs = Stream frequency,

Nu = Total no. of streams of all orders A = Area of the basin (km²)

[21]

7.

Texture Ratio (Rt)

Rt = N1/P

where, N1 = Total no. of streams of 1^storder; P = Perimeter

[19]

8.

Form Factor (Rf)

Rf = A/Lb²

where, Rf = Form factor; A = Area of the basin(km²);

Lb² = Square of basin length

[21]

9.

Circularity Ratio (Rc)

Rc = 4*π*A/P2

where, Rc = Circularity ratio; π = “Pi” value i.e. 3.14; A = Area of the basin (km²);

P = Perimeter(km)

[22]

10.

Elongation Ratio (Re)

Re = 2/Lb√(A/π)

where, Re = Elongation ratio A = Area of the basin (km²); π = “Pi” value i.e. 3.14;

Lb = Basin length

[19]

11.

Length of overland flow (Lg)

Lg = 1/D*2

where, Lg = Length of overland flow; D = Drainage density

[3]

12.

Shape index (Sw)

Lb2/A

where, Lb = Basin length; A = Area of basin

[3]

13.

Compactness coefficient (Cc)

Cc = Pc/Pu

where, Pc = Perimeter of watershed;

Pu = Perimeter of circle of watershed area

[23]

Relief Parameters

14.

Basin relief (H)

H = Maximum relief − Minimum relief

15.

Relief ratio (Rhl)

Rhl = H/Lb

where, H = Total relief Lb = Basin Length

[19]