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City of Morgan Hill
Sanitary Sewer Flow Monitoring and Inflow/Infiltration Study
12-0248 AEG CofMorganHill FM Rpt.docx
Page 34 of 46
Rainfall-Dependent Infiltration Results Summary
Table 11summarizes the calculated average RDI flow rate during the low-flow hours immediately
following the rainfall event (refer to the
I/I Methods
section for more information on RDI analysis
methods and ranking methods). Basins that ranked 1, 2 or 3 in a category are color coded red.
Table 11. Basin RDI Analysis Summary
Metering
Basin
ADWF
(mgd)
RDI Rate
(mgd)
RDI per Acre
(GPAD)
RDI per
ADWF
Overall RDI
Ranking
A
Basin 1
0.19
0.023
28
(4)
B
12%
(4)
4
Basin 2
0.17
0
0
(T7)
0%
(T7)
T7
Basin 3
0.18
0.029
85
(1)
16%
(3)
3
Basin 4
0.21
0.014
17
(5)
6%
(5)
5
Basin 5
0.27
0.051
63
(2)
19%
(2)
2
Basin 6
0.35
0
0
(T7)
0%
(T7)
T7
Basin 7/8
0.40
0
0
(T7)
0%
(T7)
T7
Basin 7
0.24
0
0
0%
Basin 8
0.16
0
0
0%
Basin 9
0.13
0.040
37
(3)
30%
(1)
1
Basin 10
0.12
0.002
4
(6)
1%
(6)
6
System
2.65
0.210
22
8%
A
Ranking of 1 represents most RDI after normalization.
B
The number in parenthesis shows the ranking within the individual Category.
The following RDI analysis results are noted:
Basins 3, 5 and 9 ranked highest for normalized RDI contribution.
Figure 24 shows bar graph summaries of the RDI analysis. A temperature map by overall ranking is
shown i
n Figure 25.