Morphometric Parameters Formula References Basic Parameters Area of Basin (A) Perimeter of Basin (P) Plan area of the watershed (km2) GIS Software analysis  Perimeter of watershed (km)  Stream Order (u) Hierarchical rank  Basin Length (Lb) Length of basin (km)/GIS software analysis    Lb = 1.321 × A0.568a  Stream Length (Lu) Length of the stream (km)  Linear Parameters Bifurcation Ratio (Rb) Rb = Nu/Nu + 1, where  Nu + 1 = no. of segments of the next higher order Drainage Density (Dd) (km/km2) Dd = Lu/A, Where  Lu + total stream length of all orders (km) A = area of the watershed (km2) Stream Frequency(Fu) (no./km2) Fu = Nu/A, where  Nu = total no. of steams of all orders A = area of the basin(km2) Texture Ratio (T) (no./km2) T = Nu/P, where  Nu = total no. of streams of all orders P = perimeter (km) Length of Overland Flow (km) Lo Lo = ½ Dd, where  Dd = drainage density Shape parameters Form Factor (Rf) Rf = A/Lb2, where  A = area of the basin (km2) Lb = basin length (km) Shape Factor (Bs) Bs = Lb2/A, where  Lb = basin length (km) A = area of the basin (km2) Elongation Ratio (Re) Re = 1.128 , where,  A = area of the basin (km2) Lb = basin length (km) Compactness Coefficient (Cc) , where  P = perimeter of the basin (km) A = area of the basin (km2) Circularity Ratio (Rc) Rc = 4 × ᴨ × A/P2, where ᴨ = 3.14  A = area of the basin (km2) P = perimeter (km)