City of Morgan Hill Sewer System Master Plan 2017

City of Morgan Hill Sanitary Sewer Flow Monitoring and Inflow/Infiltration Study

Table 8. Dry Weather Flow Summary .................................................................................................. 22 Table 9. Capacity Analysis Summary................................................................................................... 23 Table 10. Basin Inflow Analysis Summary ........................................................................................... 31 Table 11. Basin RDI Analysis Summary .............................................................................................. 34 Table 12. Basin Combined I/I Analysis Summary ................................................................................ 40 Table 13. Design Storm I/I Analysis Summary..................................................................................... 45 FIGURES Figure 1. Capacity Summary Bar Graphs: Peaking Factors and Peak d / D Ratios ............................... 2 Figure 2. Peak Measured Flow (Flow Schematic)................................................................................. 3 Figure 3. Inflow Temperature Map (by Rank)........................................................................................ 5 Figure 4. RDI Temperature Map (by Rank)........................................................................................... 6 Figure 5. Basins with Groundwater Infiltration....................................................................................... 7 Figure 6. Combined I/I Temperature Map (by Rank)............................................................................. 8 Figure 7. Site Location Map................................................................................................................. 12 Figure 8. Basin Location Map.............................................................................................................. 13 Figure 9. Typical Installation for Flow Meter with Submerged Sensor ................................................ 15 Figure 10. Rainfall Activity over Flow Monitoring Period (Avg. of Rain Gauges) ................................ 16 Figure 11. Rainfall Accumulation Plot.................................................................................................. 17 Figure 12. Rainfall Inverse Distance Weighting Method ..................................................................... 18 Figure 13. NOAA Northern California Rainfall Frequency Map........................................................... 19 Figure 14. Storm Event Classification (RG East) ................................................................................ 20 Figure 15. Sample ADWF Diurnal Flow Patterns (Site 7) ................................................................... 21 Figure 16. Average Dry Weather Flow (Flow Schematic) ................................................................... 22 Figure 17. Capacity Summary Bar Graphs: Peaking Factors and Peak d / D Ratios ........................... 24 Figure 18. Peak Measured Flow (Flow Schematic)............................................................................. 25 Figure 19. Inflow and Infiltration: Graphical Response Patterns ......................................................... 27 Figure 20. Typical Sources of Infiltration and Inflow............................................................................ 28 Figure 21. Sample Infiltration and Inflow Isolation Graph ................................................................... 30 Figure 22. Bar Graphs: Inflow Analysis Summary............................................................................... 32 Figure 23. Inflow Temperature Map (by Rank).................................................................................... 33 Figure 24. Bar Graphs: RDI Analysis Summary.................................................................................. 35 Figure 25. RDI Temperature Map (by Rank)....................................................................................... 36 Figure 26. Groundwater Infiltration Sample Figure ............................................................................. 37 Figure 27. Minimum Flow Ratios vs. ADWF........................................................................................ 38 Figure 28. Basins with Groundwater Infiltration................................................................................... 39 Figure 29. Bar Graphs: Combined I/I Analysis Summary ................................................................... 41 Figure 30. Combined I/I Temperature Map (by Rank)......................................................................... 42 Figure 31. Site 3, Storm Event 1: Synthetic Hydrograph .................................................................... 43 Figure 32. 10-Year, 24-Hour Design Storm Values and Profile (MORGA30) ..................................... 44

APPENDIX Appendix A: Flow Monitoring Sites: Data, Graphs, Information

12-0248 AEG CofMorganHill FM Rpt.docx

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