A total of 10 stations (Mohggoan, Manot, Patan, Gadarwara, Sandia, Hoshangabad, Chhidgaon, Handia, Mandleshwar, Garudeswar) were taken into consideration for the streamflow and were represented as S1, S2, S3, S4, S5, S6, S7, S8, S9, and S10, respectively (Table 1). The stations have spread along the Narmada basin starting from the upper part to the tail of the river basin (Figure 1). Streamflow extremes, Qx1day, Qx5day, and Q95p for any of the stations were not found with any significant trend. Due to the contribution from various tributaries in the downstream, the streamflow of downstream stations was comparatively higher (Table 4). Q90p is the cumulative streamflow in a year from days when streamflow was more than the 90th percentile (cumulative contribution from very high streamflow) of daily streamflow data at a station, therefore as per the definition, the magnitude of Rx5day will always be more than Rx1day and Q90p will be comparatively too high than Rx1day and Rx5day and hence the mean and Sen's slope was comparatively higher in case of Q90p (Table 4). The streamflow magnitude and consequent extremes (Qx1day, Qx5day, and Q95p) from the station (S7) installed in the tributary of the main river have also been noted with a lesser magnitude of mean and MK test statistics.

Table 4

Mean, standard deviation, and statistics of modified MK trend test (Z-statistics and Sen's slope) for streamflow indices (Qx1, Qx5, Q95p)

Stn No.IndicesQx1day
Qx5day
Q95p
Station nameMeanSDTrend (Z)Sen's SlopeMeanSDTrend (Z)Sen's SlopeMeanSDTrend (Z)Sen's Slope
Mohggoan 3,141.1 2,464.7 −1.01 −23.03 5,474.63 3,029.15 −0.60 −20.05 12,697.35 7,502.65 −0.28 −39.46 
Manot 3,239.9 1,715.2 −1.3 −39.8 6,388.5 3,107.74 −1.38 −71.03 16,259.28 10,373.93 −2.22 −364.81 
Patan 1,104.6 542.7 −0.99 −12.02 3,748.1 2,288.25 −0.34 −17.29 10,703.03 8,468.27 −0.83 −99.87 
Gadarwara 1,972.3 1,188.71 −1.56 −30 3,947.02 3,016.87 −1.12 −38.46 10,126.06 7,813.64 −0.26 −22.2282 
Sandia 9,741.7 5,766.1 −1.17 −102.9 31,06.94 20,882.9 −1.098 −345.6 75,537.08 73,474.2 −1.25 −801.43 
Hoshangabad 13,811.3 6,673.2 −2.08 −234.3 43,347.78 28,296.03 −1.80 −693.83 110,925.1 102,214 −1.93 −2,232.26 
Chhidgaon 2,488.5 2,117.9 −0.75 −13.46 3,842.135 2,742.72 −0.52 −15.145 7,077.02 5,668.85 0.10 3.45 
Handia 15,419.06 6,852.1 −1.76 −224.9 48,249.92 27,497.2 −1.98 −663.6 124,598 111,568.8 −1.93 −2,062.91 
Mandleshwar 20,838.7 11,984.5 −2.23 −349.2 59,776.26 34,705.7 −2.69 −1,252.2 151,346.1 135,844.9 −1.67 −2,758.57 
10 Garudeswar 19,339.02 13,267.9 −2.47 −373.12 56,368.48 34,580.61 −3.06 −1,323.5 142,154.7 133,471.8 −2.14 −3,194.88 
Stn No.IndicesQx1day
Qx5day
Q95p
Station nameMeanSDTrend (Z)Sen's SlopeMeanSDTrend (Z)Sen's SlopeMeanSDTrend (Z)Sen's Slope
Mohggoan 3,141.1 2,464.7 −1.01 −23.03 5,474.63 3,029.15 −0.60 −20.05 12,697.35 7,502.65 −0.28 −39.46 
Manot 3,239.9 1,715.2 −1.3 −39.8 6,388.5 3,107.74 −1.38 −71.03 16,259.28 10,373.93 −2.22 −364.81 
Patan 1,104.6 542.7 −0.99 −12.02 3,748.1 2,288.25 −0.34 −17.29 10,703.03 8,468.27 −0.83 −99.87 
Gadarwara 1,972.3 1,188.71 −1.56 −30 3,947.02 3,016.87 −1.12 −38.46 10,126.06 7,813.64 −0.26 −22.2282 
Sandia 9,741.7 5,766.1 −1.17 −102.9 31,06.94 20,882.9 −1.098 −345.6 75,537.08 73,474.2 −1.25 −801.43 
Hoshangabad 13,811.3 6,673.2 −2.08 −234.3 43,347.78 28,296.03 −1.80 −693.83 110,925.1 102,214 −1.93 −2,232.26 
Chhidgaon 2,488.5 2,117.9 −0.75 −13.46 3,842.135 2,742.72 −0.52 −15.145 7,077.02 5,668.85 0.10 3.45 
Handia 15,419.06 6,852.1 −1.76 −224.9 48,249.92 27,497.2 −1.98 −663.6 124,598 111,568.8 −1.93 −2,062.91 
Mandleshwar 20,838.7 11,984.5 −2.23 −349.2 59,776.26 34,705.7 −2.69 −1,252.2 151,346.1 135,844.9 −1.67 −2,758.57 
10 Garudeswar 19,339.02 13,267.9 −2.47 −373.12 56,368.48 34,580.61 −3.06 −1,323.5 142,154.7 133,471.8 −2.14 −3,194.88 

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