Difference between discharge in ground water flow and hydraulic gradient in flow analysis in Plaxis 2D

Hi all, 

In the flow analysis, the cross-section is cut through (2,11) and (5,11) for qy and iy as shown below. 

This is the homogeneous soil with  kx=ky=0.6221 m/day. here q=ki and left side of flow qleft = iyleft * k = 0.2063 * 0.6221 = 0.12834 m/day and qright = iyright * k = 0.1663 * 0.6221 = 0.103455 m/day and using flow section, discharge = area of the trapezium = 0.5 (0.1284 + 0.1035) * 3 = 0.34785 m3/day/m. 

My question => In the same section why the total discharge which is shown under hydraulic gradient is different from that on qy section? 

Thanks. 

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