The impact of urban groundwater upon surface water - eTheses ...

Specific discharge to the river from cell per time step
(M 3 /day ) - positive values indicate river influent to aquifer
Specific discharge to the river (m 3 -1 )
d
(negative indicates discharge to the river)
-1.00E+00
-8.00E-01
-6.00E-01
-4.00E-01
-2.00E-01
0.00E+00
2.00E-01
4.00E-01
Groundwater
Discharging
River Water
Influent
Discharge per time step through selected river boundary cells during a flood event
6.00E-01
90.2
0.0 0.2 0.4 0.6 0.8 1.0 1.2 1.4
Time (days)
Base of riverbank, gravel Sy 0.005
Centre of riverbed, gravel Sy 0.005
Base of riverbank, gravel Sy 0.35
Centre of riverbed, gravel Sy 0.35
River stage (2nd Y axis)
Figure 6.19 Groundwater discharge through the riverbed and riverbank during the course of a
flood event
-2.00E+00
0.00E+00
2.00E+00
4.00E+00
6.00E+00
8.00E+00
1.00E+01
Discharge across the riverbed at three points in time during the river flood event for
conditions of high Sy (0.35) in the gravel.
Seepage
Time 0.729 Peak Stage (90.79 m.a.o.d.)
Time 0.653 Rising Stage (90.59 m.a.o.d)
Time 0.864 Falling Stage (90.59 m.a.o.d)
Riverbed
Riverbank (East) Riverbank (West)
Cells in order starting top left of bank down across the river bed and up to the top
left hand corner, breaks between vertical and horizontal faces, cell width 0.3m,
Figure 6.20 The spatial distribution of groundwater discharge across the riverbed during a
flood event
90.9
90.8
90.7
90.6
90.5
90.4
90.3
River Stage (maod)