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Table 3

Contribution factor based on the trained ANN weights for the augmented optimal rain gauge network for 1-day-ahead streamflow forecasting

Sl. no.Augmented optimal rain gauge network (see Figure 4) (additional fictitious stations are considered in the optimal network design)
Input variablesContribution factora (CFn) of the input variables (%)
Sum
(t)(t 1)(t 2)
R1 0.82 0.84 0.87 2.53 
R2 2.36 1.11 0.54 4.01 
R3 1.83 1.21 0.87 3.91 
R4 0.78 1.46 1.43 3.68 
R5bc 1.22 0.88 0.63 2.74 
R6 0.60 0.64 1.02 2.26 
R7 1.79 0.73 0.98 3.51 
R8 1.44 1.61 2.13 5.18 
R9 0.87 1.28 0.33 2.47 
10 R10 0.57 1.10 0.59 2.26 
11 R11 0.95 1.51 0.85 3.31 
12 R12 2.25 0.64 0.55 3.44 
13 R13 1.35 0.36 0.55 2.26 
14 R14 0.25 0.24 0.98 1.46 
15 R15 0.85 0.60 0.87 2.33 
16 R16 1.35 0.26 0.58 2.20 
17 R17 0.75 0.76 0.30 1.81 
18 R18ab 0.74 1.03 1.14 2.91 
19 R19ab 1.61 0.72 1.06 3.39 
20 S1 2.22 2.02 1.62 5.86 
21 S2 2.55 2.55 2.00 7.10 
22 S3 1.10 1.18 0.89 3.17 
23 S4 1.41 0.62 0.94 2.98 
24 P1 1.01 0.46 1.30 2.78 
25 P2 1.40 0.41 1.22 3.02 
26 P3 0.73 0.55 1.09 2.37 
27 P4 0.49 0.72 1.02 2.24 
28 P5 0.32 1.09 0.38 1.80 
29 P6 0.97 0.99 0.91 2.87 
30 P7 0.39 0.80 1.03 2.22 
31 P8 0.80 0.61 1.22 2.64 
32 P9 0.49 0.84 0.82 2.14 
33 P10 1.30 1.20 0.68 3.18 
 Sum of contribution of all variables = 100 
Sl. no.Augmented optimal rain gauge network (see Figure 4) (additional fictitious stations are considered in the optimal network design)
Input variablesContribution factora (CFn) of the input variables (%)
Sum
(t)(t 1)(t 2)
R1 0.82 0.84 0.87 2.53 
R2 2.36 1.11 0.54 4.01 
R3 1.83 1.21 0.87 3.91 
R4 0.78 1.46 1.43 3.68 
R5bc 1.22 0.88 0.63 2.74 
R6 0.60 0.64 1.02 2.26 
R7 1.79 0.73 0.98 3.51 
R8 1.44 1.61 2.13 5.18 
R9 0.87 1.28 0.33 2.47 
10 R10 0.57 1.10 0.59 2.26 
11 R11 0.95 1.51 0.85 3.31 
12 R12 2.25 0.64 0.55 3.44 
13 R13 1.35 0.36 0.55 2.26 
14 R14 0.25 0.24 0.98 1.46 
15 R15 0.85 0.60 0.87 2.33 
16 R16 1.35 0.26 0.58 2.20 
17 R17 0.75 0.76 0.30 1.81 
18 R18ab 0.74 1.03 1.14 2.91 
19 R19ab 1.61 0.72 1.06 3.39 
20 S1 2.22 2.02 1.62 5.86 
21 S2 2.55 2.55 2.00 7.10 
22 S3 1.10 1.18 0.89 3.17 
23 S4 1.41 0.62 0.94 2.98 
24 P1 1.01 0.46 1.30 2.78 
25 P2 1.40 0.41 1.22 3.02 
26 P3 0.73 0.55 1.09 2.37 
27 P4 0.49 0.72 1.02 2.24 
28 P5 0.32 1.09 0.38 1.80 
29 P6 0.97 0.99 0.91 2.87 
30 P7 0.39 0.80 1.03 2.22 
31 P8 0.80 0.61 1.22 2.64 
32 P9 0.49 0.84 0.82 2.14 
33 P10 1.30 1.20 0.68 3.18 
 Sum of contribution of all variables = 100 

aBold font shows variables having a contribution factor greater than 1/99 = 1.01%.

bOptimal position of additional rain gauge stations (stations 18 and 19, see Figure 3) as identified by Adhikary et al. (2015).

cOptimal re-located position of redundant rain gauge station (station 5, see Figure 3) as identified by Adhikary et al. (2015).

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