Aspects Parameter Formula Unit Reference Linear Perimeter (P) GIS Software km Schumm (1956) [15] Basin Length (Lb) GIS Software km Schumm (1956) [15] Stream order (Nu) GIS Software Dimensionless Schumm (1956) [15] Stream length (Lu) ${N}_{u}={N}_{1}+{N}_{2}+{N}_{3}+\cdots +{N}_{n}$ km Horton (1945) [16] Mean Stream length (Rbm) ${L}_{sm}=\frac{{L}_{u}}{{N}_{u}}$ km Horton (1945) [16] Bifurcation ratio (Rb) $Rb=\frac{{N}_{u}}{{N}_{u}+1}$ Dimensionless Horton (1945) [16] Stream length ratio (Lurm) ${L}_{urm}=\frac{{L}_{ur}}{{L}_{u-1}}$ Dimensionless Horton (1945) [16] Rho Coefficient (ρ) $\rho =\frac{{L}_{u}}{{R}_{b}}$ Dimensionless Horton (1945) [16] Areal Area (A) GIS Software km2 GIS Software Drainage density (Dd) $Dd={\sum }^{\text{​}}\frac{{L}_{u}}{A}$ km/km2 Horton (1945) [16] Stream Frequency (Fs) $Fs=\frac{Nu}{A}$ Km−2 Horton (1945) [16] Drainage Texture (T) $T=Dd\cdot Fs$ Km−1 Smith (1950) [17] Texture Ratio (Rt) $Rt=\frac{{N}_{u}}{P}$ Km−1 Horton (1945) [16] Length of Overland Flow (Lg) $Lg=\frac{1}{2}Dd$ km Schumm (1956) [15] Constant of Channel Maintenance (CCM) $C=\frac{1}{Dd}$ km Schumm (1956) [15] Form factor (Ff) $Rf=\frac{A}{{\left({L}_{b}\right)}^{2}}$ Dimensionless Horton (1932) [18] Circularity index (Rc) $Rc=4\pi \left(\frac{A}{{P}^{2}}\right)$ Dimensionless Miller (1953) [10] Elongation ratio (Re) $Re=\frac{\sqrt{\frac{A}{\pi }}}{{L}_{b}}$ Dimensionless Schumm (1956) [15] Shape Index (Sw) $Sw=\frac{1.27A}{{\left({L}_{b}\right)}^{2}}$ Dimensionless Haggett (1966) [19] Compactness Coefficient (Cc) $Cc=\frac{P}{2\left(\sqrt{\pi A}\right)}$ Dimensionless Horton (1945) [16] Infiltration Number (If) $IF=Fs\cdot Dd$ Dimensionless Faniran (1968) [20] Relief Basin Relief (R) $R=E-e$ m Schumm (1956) [15] Relief Ratio (Rh) $Rh=\frac{R}{{L}_{b}}$ Dimensionless Schumm (1956) [15] Relative Relief (Rr) $Rr=\frac{R}{P}$ Dimensionless Melton (1957) [21] Ruggedness number (Rn) $Rn=R\cdot Dd$ Dimensionless Schumm (1956) [15] Gradient Ratio (Gr) $Rg=\frac{Es-Em}{Lb}$ Dimensionless Sreedevi et al. (2004) [22] Melton Ruggedness Ration (MRn) $MRn=\frac{H-h}{\sqrt{A}}$ Dimensionless Melton (1965) [23] Lemniscate Shape (K) $K=\frac{\pi {\left(Lb\right)}^{2}}{4A}$ Dimensionless Chorley and Morley (1959) [24] Basin Slope (Sb) $Sb=\frac{H-h}{Lb}$ Dimensionless Miller (1953) [10] Channel Gradient (Cg) $Cg=\frac{R}{\frac{\pi }{2\cdot Lb}}$ m/km Singh et al. (2014) [25] Hypsometric Integral (HI) $HI=\frac{Elev-Ele{v}_{min.}}{Ele{v}_{max.}-Ele{v}_{min.}}$ Dimensionless Strahler (1957) [12] Dissection Index (Di) $Di=\frac{Rr}{Ele{v}_{max.}}$ Dimensionless Schumm (1956) [15]