| Morphometric parameters | Unit | Formula | Reference |
| Linear aspect | |||
| Stream order (u) | - | Hierarchical rank | Strahler (1964) [15] |
| Stream number (Nu) | - | ||
| Stream length (Lu) | - | Length of the stream | Horton (1945) [32] |
| Mean stream length (Lsm) | km | Lu/Nu | Strahler (1964) [15] |
| Stream length ratio (RL) | Lu/Lu − 1 | Horton (1945) [32] | |
| Bifurcation ratio (Rb) | Nu/Nu + 1 | Schumm (1956) [41] | |
| Mean bifurcation ratio (Rbm) | Average of bifurcation ratios of all orders | Strahler (1957) [34] | |
| Aerial aspect | |||
| Dainage density (Dd) | km/km2 | Lu/A | Horton (1932) [45] |
| Stream frequency (Fs) | Nu/A | Horton (1932) [45] | |
| Drainage texture (Dt) | Nu/P | Horton 1945 [32] | |
| Form factor (Rf) | A/Lb2 | Horton (1932) [45] | |
| Circulatory ratio (Rc) | 12.57 A/P2 | Miller (1953) [55] | |
| Elongation ratio (Re) | 1.128 A0.5/Lb or (2/Lb)*(A/pi)0.5 | Schumm (1956) [41] , Nookaratnam et al. 2005 [44] | |
| Infiltration number (If) | Dd*Fs (Drainage density* stream frequency) | Faniran (1968) [57] | |
| Basin shape (Bs) | Lb2/basin area (A) (basin length) | Horton (1945) [32] | |
| Length of overland flow (Lg) | km | 1/2 of reciprocal of dd or 1/2 Dd | Horton (1945) [32] |
| Drainage Intensity (Di) | Fs/Dd | Faniran (1968) [57] | |
| Constant of Channel Maintenance (C ) | km−2 | 1/Dd | Schumm (1956) [41] |
| Relief aspect | |||
| Basin relief (R) | m | H-h (max elevation-min elevation) | Strahler (1952) [9] |
| Relief ratio | R/Lb (basin relief/max length of basin) | Schumm (1956) [41] | |
| Ruggedness number (Rn) | drainage density*basin relief/1000 | Patton (1988) [47] | |
| Morphotectonic and geomorphic indices | |||
| Assynetry factor (Af-factor) |
| (Ar/At)*100 | Hare and Gardner (1985) [63] |
| Sinuosity index |
| Curvilinear/straight distance of river | _ |