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City of Ann Arbor SSWWEP - Citizens Advisory Committee Coordination — City of Ann Arbor

1.20 -C– How are you measuring the 3 different flows (rainwater inflow, rainwater infiltration and ground water infiltration)?

Posted by Lori Byron on 20 Dec, 2013
Category: Category 1 - SSWWEP Questions and Presentations

Frank Burdick’s Log Number: N/A
Submitted by: April Public meeting
Category (1,2,3): 1
Status: Closed
Estimated date to address: N/A

Q. How are you measuring the 3 different flows (rainwater inflow, rainwater infiltration and ground water infiltration)?

A. In two ways: 
First, the flow metering records a single wet weather flow pattern from each storm. 
Second, we break down the wet weather flow pattern. The antecedent moisture model uses digital signal processing to separate the flow pattern into three wet weather flow components: rainwater inflow, rainwater infiltration and ground water infiltration. Each flow component reacts differently to rainfall, so each needs to be modeled independently. 

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