Morphometric Parameters Formula/Definition References I Basic Parameters 1 Basin Area (A) (Km2) GIS Software Analysis Schumm (1956) 2 Basin Perimeter (P) (Km) GIS Software Analysis Schumm (1956) 3 Basin Length (Lb) GIS Software Analysis Schumm (1956) 4 No. of streams (Nu) Hierarchical Rank Strahler (1952) 5 Stream Length (Lu) (Km) ${L}_{u}={L}_{1}+{L}_{2}+\cdots +{L}_{n}$ Strahler (1964) 6 Mean Stream Length (Lsm) (Km) ${L}_{sm}={L}_{u}/{N}_{u}$ (km) Horton (1945) II Derived Parameters 7 Bifurcation ratio (Rb) ${R}_{b}={N}_{u}/{N}_{u+1}$ Strahler (1964) 8 Weighted mean bifurcation ratio (WMRb) $WM{R}_{b}={\sum }^{\text{​}}\left\{\left({R}_{b}u/u+1\right)×\left({N}_{u}+{N}_{u}+1\right)\right\}/{\sum }^{\text{​}}N$ Strahler (1953) 9 Stream Length ratio (RL) RL = Lu/Lu-1. Strahler (1964) 10 Sinuosity (SI) SI = Lm/Lb Gregory and Walling (1973)  11 Basin shape index (Ish%) ${I}_{sh}%=1.27\ast A/{L}_{b}^{2}$ Haggett (1965)  12 Length of overland flow (Lo) Lo = 1/2Dd Horton (1945) 13 RHO coefficient (ρ) ρ = RL/Rb Horton (1945) 14 Stream frequency (Fs) Fs = Nu/A Horton (1932) 15 Drainage density (Dd) Km/Km2 Dd = Lu/A Horton (1932) 16 Drainage texture (Dt) Dt = Nu/P Horton (1945) 17 Basin relief (Bh) m Bh = H − h Strahler (1952) 18 Slope index (SIn%) SIn% = (E/0.75Lm) × 100 (E = E85 − E10), E85 and E10 are the elevation of points at 85% and 10% of the main channel from its mouth). (Lm = The length of main channel from its mouth to water divide). Majure and Soenksen (1991)  19 Relief ratio (Rr) Rr = H/Lb Schumm (1956) 20 Ruggedness number (Rn) Rn = D × (Bh/1000) Melton (1957) III Shape Parameters 21 Elongation ratio (Re) ${R}_{e}=1.128\sqrt{A/{L}_{b}}$ Schumm (1956) 22 Circularity ratio (Rc) Rc = 4πA/P2 Miller (1953) 23 Form factor ratio (Rf) ${R}_{f}=A/{L}_{b}^{2}$ Horton (1932)