for rainfall related inflow during wet weather periods. Continuous metering will be
conducted for the designated time period as directed by the Client.
The flow monitoring will be accomplished by one of the following methods:
1. The use of continuous monitoring devices incorporating a velocity sensor combined with
a depth sensor, or
2. Palmer Bowlus flumes, in conjunction with continuous depth recording.
D. Flow monitoring data reduction and review will be performed on all data obtained each flow
monitoring location. The data obtained will be reduced, evaluated, and presented in report
form. One (1) copy of the completed report will be submitted to the Client. This will
include, for each location, tabular reports based on 15-minute time increments.
The tabular report will be provided and will include:
A summary of daily flow information for a selected time period. The summary presents, for
each day, the minimum flow rate, peak flow rate, total daily flow, total rain, peak hourly rain,
and peak 15-minute rainfall, if applicable. The summary also includes the total flow volume,
average daily flow, and total rainfall quantity, if applicable, for the selected time period.
Detailed flow reports of the flow rate data in 15-minute time increments will also be
prepared and submitted. The detailed report will include depth of flow, velocity of flow,
incremental flow rate, cumulative flow rate and recorded rainfall. The report will also
include the total daily flow volume and total daily rainfall quantity, if applicable.
In addition, flow hydrographs will be prepared for each flow monitoring location, which
present a plot of the recorded flow rates for a selected time period. A bar graph of rainfall
recorded during the selected time period is also plotted on the hydrograph.
Further, periodically data will be posted to a secure password protected web site that will
allow project personnel access to flow, rainfall and groundwater recorded data. Users then
can prepare and review detailed flow reports, graphs and tables. Comparison between wet
and dry periods as well as net flows per sub system calculations may also be performed.
Online data export format capabilities included Excel, Access, and ASCII.
IILQUALITY CONTROL PROCEDURES
FIELD OPERATIONS-SITE SELECTION
Since the flow monitoring site can play a significant role in obtaining accurate flow monitoring
data, site selection in the field will be given a high priority. The proposed monitoring site will be
visited for the specific purpose of observing flow characteristics. Every effort will be made to
identify a monitoring site that will provide accurate data while attempting to comply with the
original location plan.
Observations such as surcharging or backing up of flows are less than ideal for monitoring and if
possible will be avoided. Manholes having more than one line entering and irregular
flow/velocity patterns will also be looked on as less than favorable.
