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City of Morgan Hill
Sanitary Sewer Flow Monitoring and Inflow/Infiltration Study
12-0248 AEG CofMorganHill FM Rpt.docx
Page 31 of 46
Inflow / Infiltration: Results
Inflow Results Summary
Table 10summarizes the peak measured I/I flows and inflow analysis results for Storm Event 1,
which elicited the highest peak I/I response (refer to the
I/I Methods
section for more information on
inflow analysis methods and ranking procedures). Basins that ranked 1, 2 or 3 in a category are color
coded red.
Table 10. Basin Inflow Analysis Summary
Metering
Basin
ADWF
(mgd)
Peak I/I
Rate
(mgd)
Peak I/I per
Acre
(gpd/acre)
Peak I/I per
ADWF
Overall
Inflow
Ranking
A
Basin 1
0.19
0.23
286
(7)
B
1.22
(6)
7
Basin 2
0.17
0.13
140
(9)
0.77
(9)
9
Basin 3
0.18
0.46
1,334
(1)
2.55
(1)
1
Basin 4
0.21
0.41
500
(3)
1.92
(3)
2
Basin 5
0.27
0.18
219
(4)
0.66
(7)
6
Basin 6
0.35
0.57
295
(6)
1.61
(5)
5
Basin 7/8
0.40
0.67
878
(2)
1.68
(4)
3
Basin 7
0.24
0.57
2,010
2.36
Basin 8
0.16
0.21
434
1.31
Basin 9
0.13
0.34
308
(5)
2.50
(2)
4
Basin 10
0.12
0.11
233
(8)
0.85
(8)
8
System
2.65
2.97
312
1.12
A
Ranking of 1 represents most inflow after normalization.
B
The number in parenthesis shows the ranking within the individual Category.
The following inflow analysis results are noted:
Basins 3, 4, 7/8 and 9 ranked highest for normalized inflow contribution.
♦ If isolated, Basin 7 ranks highly within the Basin 7/8 basin and highly within the collection
system.
Figure 22shows bar graph summaries of the inflow analysis.
Figure 23 shows a temperature map
summary of the inflow analysis results per basin.