Morphometric Parameters Formula/Definition References I Basic Parameters 1 Basin area (A) (Km2) Plan area of the watershed (Km2)  2 Basin perimeter (P) (Km) Perimeter of the watershed (Km)  3 Basin length (Lb) Km Length of the basin (Km)  4 Stream order (Nu) Hierarchical Rank  5 Stream length (Lu) Kms Lu = L1 + L2, ・・・, Ln  6 Mean stream length (Lsm) (Km) Lsm = Lu/Nu (Km)  7 Maximum and minimum heights (H, h) m  8 Slope(Sb) II Derived Parameters 9 Bifurcation ratio (Rb) Rb = Nu/Nu + 1, where Nu = total no. of stream segments of oder “u”, Nu + 1 = no. of segments of the next high order  10 Mean bifurcation ratio (Rbm) Rbm = average of bifurcation ratio of Strahler all order.  11 Stream Length ratio (RL) RL = Lu/Lu − 1, where Lu = the total stream length of order “u”, Lu − 1 = No. of segment of the next lower order.  12 RHO coefficient (ρ) ρ = RL/Rb  13 Stream frequency (Fs) Fs = Nu/A  14 Drainage density (Dd) Km/Km2 Dd = Lu/A  15 Drainage texture (Dt) Dt = Nu/P, where Nu = Total no. of streams of all orders, P = perimeter (Km)  16 Basin relief (Bh) m Bh = Hmax − Hmin, where, Hmax = maximum height (m), and Hmin = minimum height (m)  17 Relief ratio (Rr) Rr = H/Lb, where, H = Total relief, and Lb = basin length  18 Ruggedness number (Rn) Rn = Dd*(Bh/1000)  19 Hypsometric integral (HI) HI = (Hmean − H)/(H − h), where H = max. elevation, and h = min. elevation  III Shape Parameters 20 Elongation ratio (Re) Re = 21 Circularity ratio (Rc) Rc = 4*π*A/p2  22 Form factor (ratio) (Rf) Rf = A/Lb2