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Effectiveness of Wastewater Collection System Rehabilitation to Reduce Infilration and Inflow Feb 2004
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Effectiveness of Wastewater Collection System Rehabilitation to Reduce Infilration and Inflow Feb 2004
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6/5/2009 11:15:22 AM
Creation date
6/1/2009 12:27:28 PM
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PW_Exec
PW_Division_Exec
Engineering
PWA_Project_Area
Wastewater
PW_Subject
Wastewater
Document_Date
2/29/2004
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120 <br />,.., 100 <br />:~ <br />~ 80 <br />d <br />~ 60 <br />0 <br />~ 40 <br />D <br />~ 20 <br />0 <br />DA Basin <br />Pre- vs. Post-Rehabilitation Monitoring Results <br />Reduction = 29% <br />y = 4.29x <br />e <br />° ° ° <br />° ® y = 3.04x <br />° Pre-Rehabililatlon <br />® b Post-RehabllRation <br />0.0 5.0 10.0 15.0 20.0 25.0 <br />Event + 30-Day Preceding Rainfall Volume (in) <br />Figure 10 - DA Basin pre- vs. post-rehabilitation event comparison (measured flow vs. event <br />+ 30-day rainfall) <br />80 <br />~ 70 <br />~ 60 <br />..~- <br />ar 50 <br />3 40 <br />~° 30 <br />~ 20 <br />d <br />a 10 <br />0 <br />DA Basin <br />Pre- vs. Post-Rehabilitation Monitoring Results <br />0.0 0.1 0.2 0.3 0.4 0.5 0.6 <br />Event Rainfall Peak Intensity (in/hr) <br />Reduction = 35% <br />y =123.69x <br />e <br />O O <br />y = 80.37x <br />to <br />•Pre-Rehabilitation <br />® Post-Rehabilitation <br />Figure 11 - DA Basin pre- vs. post-rehabilitation event comparison (measured peak flow vs. <br />event + rainfall maximum intensity) <br />DA-21 Basin <br />23 <br />
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