Flow Reporting

The most important goal of any flow study involves providing our clients with the best possible data capable of being recorded by their or our flow meters.  At Drnach Environmental,  we have developed an Extensive QA/QC program to help achieve these goals.  How that data is presented varies with our clients and engineers personal tastes and needs.  The basic Drnach Environmental Flow Report (see links to the left of this page), has evolved over the years as a result of input from our clients and our concerns that anyone reviewing this report has a clear understanding of where, when, and what was learned from the flow study.

Average Hourly Data:

Flow measurement frequencies vary from site to site, and although all of the raw data is provided to our clients in an electronic format, hard copies of hourly average head, velocity, flow, and rainfall data are provided for quick and easy review of daily activities.

Monthly Flow and Rain Line Graph:

Weekly Flow and Rain Line Graph:

Weekly Head and Velocity Line Graph (with rain):

Graphs are provided of hourly flows over the course of the calendar month, along with rainfall data.  This is broken down further into weekly flows with  daily average dry weather flows, and weekly head and velocity hydrographs.

Flow and Rain Bar Charts:

Monthly Bar Charts depict average daily flow totals, along with daily rainfall totals, in two separate bar charts.

Scatter-graphing of head/velocity and head/flow data points is used extensively by Drnach Environmental.  Total H/V data is plotted, along with total H/F data, and free flow H/V data.  Explanations for our viewing of this data can be found on our Methods and Philosophy page.  Both total and free flow data for long term studies are plotted in a summary scatter graph, color coded by calendar month.

Daily Sums:

The Daily Summary table was developed at the request of Clients who wanted a quick and easy view of the average, minimum, and maximum daily flow and rain totals.  We have also included the time that the maximum and minimum flows were observed.

Diurnal flow charts are provided of both total hourly flow average and dry weather flow average for the calendar month.