Table 2.
The morphometric properties of the Supin–Upper Tons watershed derived from the different datasets
| Morphometric properties | SRTM DEM (90 m) (S90) | ASTER GDEM (30 m) (A30) | Cartosat-1 DEM (30 m) (C30) | Topographical map (1:250,000) | Topographical map (1:50,000) | ASTER GDEM (resampled 90 m) (A90) | Cartosat-1 DEM (resampled 90 m) (C90) | ||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Surveyed (T50A) | DEM derived (T50D) | Overall | Overall | ||||||||||
| Overall | Ice free area | Overall | Ice free area | Overall | Ice free area | Surveyed (T250A) | DEM derived (T250D) | – | Overall | Ice free area | – | – | |
| Catchment size properties | |||||||||||||
| Basin area (sq km) | 976.20 | 498.00 | 977.40 | 498.90 | 970.80 | 497.40 | 955.22 | 958.80 | 978.15 | 973.40 | 831.40 | 1197 | 1188 |
| Basin perimeter (km) | 214.90 | 266.40 | 179.00 | 255.70 | 188.50 | 258.20 | 164.91 | 164.40 | 171.02 | 169.20 | 170.45 | 188.7 | 191.9 |
| Basin length (km) | 52.63 | 52.85 | 52.50 | 51.33 | 51.64 | 52.80 | 52.65 | 54.3 | 53.5 | ||||
| Main channel length (km) | 57.86 | 47.60 | 60.37 | 48.54 | 60.38 | 48.34 | 49.76 | 62.91 | 47.21 | 62.54 | 47.18 | 73.35 | 70.27 |
| Total channel length (km) | 1984.12 | 861.82 | 3760.92 | 1822.78 | 3921.75 | 1868.98 | 493.67 | 1434.91 | 1733.43 | 1474.66 | 619.84 | 2264.57 | 2333.84 |
| Total number of stream segments | 2457 | 1036 | 8314 | 4141 | 7832 | 3717 | 132 | 1376 | 2060 | 1379 | 575 | 2542 | 2467 |
| Stream order | 6 | 6 | 7 | 7 | 7 | 6 | 4 | 6 | 6 | 6 | 5 | 6 | 6 |
| Relief properties | |||||||||||||
| Absolute relief (m)—maximum | 6307 | 6284 | 5891 | 6351 | 6317 | 6254 | 5882 | ||||||
| Absolute relief (m)—minimum | 1275 | 1282 | 1229 | 1343 | 1302 | 1306 | 1248 | ||||||
| Mean relief (m) | 3742.05 | 3939.30 | 3875.07 | 3762.95 | 3931.33 | 3929.65 | 3864.58 | ||||||
| Relative relief (m) | 5032 | 5002 | 4662 | 5008 | 5015 | 4948 | 4634 | ||||||
| Relief ratio | 95.61 | 94.65 | 88.80 | 97.56 | 95.61 | 91.12 | 86.62 | ||||||
| Hypsometric integral | 0.53 | 0.53 | 0.56 | 0.49 | 0.52 | 0.53 | 0.56 | ||||||
| Shape properties | |||||||||||||
| Circularity ratio | 0.27 | 0.38 | 0.34 | 0.44 | 0.27 | 0.42 | 0.41 | ||||||
| Elongation ratio | 0.67 | 0.67 | 0.67 | 0.68 | 0.67 | 0.72 | 0.73 | ||||||
| Texture properties | |||||||||||||
| Drainage density (sq km/ km) | 2.03 | 1.73 | 3.85 | 3.65 | 4.04 | 3.76 | 0.52 | 1.50 | 1.77 | 1.51 | 0.75 | 1.89 | 1.96 |
| Constant of channel maintenance (sq km/km) | 0.49 | 0.58 | 0.26 | 0.27 | 0.25 | 0.27 | 1.93 | 0.67 | 0.56 | 0.66 | 1.34 | 0.53 | 0.51 |
| Stream frequency (no. per sq km) | 2.52 | 2.08 | 8.51 | 8.30 | 8.07 | 7.47 | 0.14 | 1.44 | 2.11 | 1.42 | 0.69 | 2.12 | 2.08 |
| Bifurcation ratio | 4.58 | 4.05 | 4.41 | 4.06 | 4.31 | 5.29 | 4.85 | 4.22 | 4.44 | 4.24 | 5.29 | 4.72 | 4.56 |