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Final Report <br />City of Paris, Texas <br />Wastewater Collection System Capacity Analysis <br />Figure 2- Average Dry Weather Flow Components <br />Average Dry Weather Components <br />2.000 <br />1.500 <br />G <br />f <br />« 1.000 <br />~ <br />3 <br />0 <br />LL <br />0.500 <br />0.000 <br />Tim e of Day <br />N BUI M VYV11P <br />Once the Average Dry Weather Flows and the associated components <br />have been calculated, an assessment of the effects of rainfall on the system <br />is performed. The following section discusses the analysis of the wet <br />weather response. <br />Wet Weather Flow Components <br />The intent of wet weather analysis is to determine how discrete portions of <br />the collection system respond to rainfall events. Understanding these <br />responses allows subsequent efforts to be focused only in areas with the <br />greatest need. Conversely, those areas that are in relatively good condition <br />can be deferred. <br />Rainfall Dependent Inflow and Infiltration (RDII) or Defect Generated Flows <br />Rainfall Dependent Inflow and Infiltration is that additional flow (over <br />and above Average Dry Weather Flow) that occurs as a direct result of <br />rainfall. It is composed of : <br />• The inflow component from direct or indirect defects <br />• The infiltration component that generally results from defects <br />activated by elevated ground water. <br />8 <br />1 4 7 10 13 16 19 22 <br />