QFlow– Quantative Flow Analysis

To contact us:

Utility Services Corporation

810 N 330 West

Valparaiso, IN 46385

Phone: 219-762-7661

Fax: 219-762-1978

E-mail: info@utilityservicescorp.com

utilityservicescorp

A method that finds restrictions and evaluates capacity:

One of the most intriguing prospects of the Qflow method is the ability to evaluate the hydraulic capacity of the collection system using the data generated from field observations and actual flow in the system.

Qflow gives a snapshot of the hydraulic characteristics within the collection system and offers clues where either the existing upstream flow volume may compromise reserve capacity or limit the hydraulic carrying capacity to accommodate new extensions of existing mains.

In concept, the Qflow methodology is quite simple. As collection system maps are authenticated, an estimate is made for the anticipated flow geometry based on the number of upstream customers. That is, what volume of the pipe should be occupied during dry weather? Following the computational work, in a systematic manner, field personnel simply measure the depth of flow at a given manhole. This information is used to estimate the volume of sanitary flow present in the pipe. Comparing the anticipated flow with the actual flow geometry offers relevant information about the presence of a downstream restriction or blockage. The flow data and piping geometry are also used in the analysis of the available capacity of the pipe segment and offers additional information to prioritize future planning of maintenance and capital improvement.

Qflow is appropriate when considering a number of factors:

· Specific to field activity, inspections are quick and require a minimum in training.

· The equipment used for evaluation is readily available and at low cost.

· Similar to conventional methods of flow metering, the evaluation is primarily conducted at manholes.

· No confined space entry is required.

· Both hydraulic performance and capacity are determined with a minimum amount of field data.

· The field inspections can be done year round and not be wet weather dependent.

· Analysis of the collection piping enhances planned maintenance, and reduces the need for emergency activity.

· The Qflow method is applicable for those portions of the collection system using gravity piping, not force mains.

Utility Assets Mapping

In concert with comprehensive mapping, the utility maintains a record in computer form for each identified asset. As inspections are made of manholes, pipe runs, and lift stations, current data is updated with corrections to the original entries. Field investigations are made in paper form and subsequently entered into the databases. By design, summary analysis is then facilitated by the selection and sorting capability of the database program. Finally, the EPA guidebook recommends a comprehensive list of collection system assets, organized by location, date of installation, and construction type. After entry into the database files, this information is easily queried or compiled in report form.

Staff Training Programs:

We offer two classes to teach your staff the Flocis Method. These classes can be taught either on-site or off-site. A description of the class format is below. Both classes are approximately seven hours long. To register for these classes please call us at 219-762-7661.

First class includes: Map Organization, GEO Referencing, Data Preparation, Hydraulic Theory, Watershed concepts, Source/Receiver Concepts, the QFlow Technique, Preventative Maintenance Program, and Meter Design and Installation.

Second class includes: PDA Operation, Data Collection, Internet File Transfer, FloViz Operation, Data Analysis and Decision Tools.

 

Back to FLoCis

Is your collection system in trouble?

Call to schedule a class today:

219-762-7661