Evaluation of different digital elevation models for analyzing drainage morphometric parameters in a mountainous terrain: a case study of the Supin–Upper Tons Basin, Indian Himalayas

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Table 5 Averaged percentage difference between corresponding grid-wise morphometric values across the different datasets for four select parameters

Difference from	Difference computation	Averaged percentage difference
Difference from	Difference computation	Mean elevation	Relative relief	Slope	Drainage density
A30	A30–A90	−4.11	5.07	7.92	34.27
	A30–C30	1.67	7.86	5.25	−11.69
	A30–C90	−2.40	14.50	16.65	31.13
	A30–S90	0.08	6.72	6.19	53.51
	A30–T50D	−0.05	13.05	11.47	69.78
	A30–T250D	2.74	14.58	15.47	63.24
	A30–T50A	−0.48	6.66	−9.14	54.85
	A30–T250A	2.69	27.77	1.12	87.56
A90	A90–C30	1.48	−19.07	−18.85	−504.00
	A90–C90	1.58	8.17	7.93	−70.47
	A90–S90	−0.12	−22.34	−19.48	−186.39
	A90–T50D	−0.24	−13.06	−12.25	−67.20
	A90–T250D	2.82	−4.72	−2.83	−98.14
	A90–T50A	−0.65	−21.70	−37.34	−124.36
	A90–T250A	2.77	10.51	−20.11	35.06
C30	C30–C90	−4.16	5.72	11.09	38.45
	C30–S90	−1.65	−4.84	−1.28	55.52
	C30–T50D	−1.77	2.64	4.57	71.10
	C30–T250D	1.10	5.63	9.75	65.97
	C30–T50A	−2.22	−4.72	−17.82	58.67
	C30–T250A	1.04	20.13	−5.61	88.51
C90	C90–S90	−1.71	−36.30	−31.12	−293.65
	C90–T50D	−1.83	−26.08	−23.10	−188.21
	C90–T250D	1.30	−17.21	−13.02	−76.93
	C90–T50A	−2.25	−35.80	−50.84	−116.31
	C90–T250A	1.24	−0.18	−31.80	30.39
S90	S90–T50D	−0.12	6.54	5.55	28.85
	S90–T250D	2.66	7.03	8.49	−72.73
	S90–T50A	−0.56	−0.48	−16.71	−71.97
	S90–T250A	2.61	21.32	−6.97	58.97
T50D	T50D–T250D	2.79	−5.73	0.17	−123.76
	T50D–T50A	−0.45	−7.67	−23.72	−159.61
	T50D–T250A	2.74	9.09	−16.37	31.33
T250D	T250D–T50A	−4.46	−88.98	−103.15	−187.97
T250D	T250D–T250A	−0.05	−60.11	−24.68	56.10
T50A	T50A–T250A	3.12	11.96	−18.57	49.16

The difference between corresponding values of two parameters for each of the 1154 one sqkm grids overlain across the basin surface has been first computed. Then the % difference was computed, again for each of these grids, by dividing the computed difference for each by the corresponding parameter value from which the subtraction is done, multiplied by 100. The mean of these % difference values for the 1154 grids has then been tabulated here