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

Specific discharge to the river m 3 d -1
(negative indicates discharge to the river)
Cell out-flow per meter length of channel (m 3 d -1 )
-1.6
-1.4
-1.2
-1.0
-0.8
-0.6
-0.4
-0.2
0.0
Steady State Specific Discharge to the River Boundary Condition when Impermeable
Obstructions to Flow are Distributed across the Riverbed.
Dry Weather Flow Conditions, R24
Seepage face, R24
Discharge with riverbed obstructions
Seepage face with obstructions
River Bank (East) River Bed
River Bank (West)
Cell Dimensions
Horizontal 0.3 m
Vertical 0.1 m
River boundary cells in order starting at the top of the Eastern bank down across the river bed and
up to the top of the Western bank, breaks between vertical and horizontal faces.
Figure 6.12 The effect of obstructions on groundwater flow across the riverbed
7
6
5
4
3
2
1
-1
Variation in the Groundwater Discharge to the River Boundary Condition along the
Modflow Model Reach.
0
0 20 40 60 80 100
River cell number going downstream
Figure 6.13 Variation in groundwater discharge to the river along the MODFLOW model
reach