S/N

Morphometric Parameters

Derivation Procedure

Reference

1.

Stream order (u)

Hierarchical order

Strahler, 1964

2.

Stream length (Lu)

Length of the stream

Horton, 1945

3.

Basin length (Lu)

This is the straight line from the mouth of the basin to the farthest point on the basin perimeter

Schumn, 1963

4.

Main stream length (km)

This is the length of the principal drainage

Schumn, 1963

5.

Main stream length (km)

Total stream lengths in the basin divided by total number of streams

Schumn, 1963

6.

Total stream length (km)

This is the total length of all the tributaries and the principal drainage

Schumn, 1963

7.

Basin perimeter (p)

This is the outer boundary of the drainage basin that encloses its area

Schumn, 1956

8.

Bifurcation ration (R_b)

${\text{R}}_{\text{b}}=\text{Nu}/\text{Nu}+\text{1}$ , where u = total no of streams of order “u”, Nu + 1 = No of segment of the next higher order

Schumn, 1963

AREA PROPERTIES

1.

Basin Area (A)

Area = map scale counted squares

Gregory and Walling, 1973

2.

Drainage Density (Dd)

EL/A where L = total length of all streams; A = Basin Area

Horton, 1945

3.

Stream frequency (Fs)

N/A where N = Total no of streams; A = Area of the basin

Horton, 1945

4.

Form factor

A/(Lb)² where A = Basin Area, Lb = Basin length

Horton, 1932

5.

Circulatory Ration (Rc)

AπA/P² where A = Basin Area, π = 3.14, Lb = Basin length

Horton, 1932

6.

Elongation Ration (Re)

$\text{2}\sqrt{\left(\text{A}/\text{π}\right)/\text{Lb}}$ where A = Basin Area, Lb = Basin length and π = 3.14

Schumn, 1959

RELIEF PROPERTIES

1.

Basin Relief (H)

Vertical distance between the lowest and highest points in the basin (max¹ H-min. H)

Schumn, 1956

2.

Relief Ration (Rh)

H/Lb where H = basin relief, Lb = Basin length

Schumn, 1956

3.

Max Relief (maxH)

The highest point value of elevation in a drainage basin

Schumn, 1956

4.

Min Relief (minH)

This is the lowest elevation in a drainage basin.

Schumn, 1956