Posts about

Water and Wastewater

What’s a Digital Twin for Water and Wastewater?

July 29, 2021

These days, I get involved in a lot of discussions about “digital twins”. One of the most common questions is, “What is a digital twin?” With so..

Solving Pressure Problems with your Model

July 8, 2021

No one likes to have very low pressure at their home or business, and low pressure is one of the most common complaints water systems get from..

Academic Assumptions

June 22, 2021

Part of my job is to keep track of water and sewer modeling research. I’m constantly reading journal papers or attending conference sessions to..

Time for a Quiz

June 16, 2021

Last fall, I did a hydraulics quiz and readers seemed to enjoy it. So, here’s another one. See how you do and feel free to share. Answers are at..

My Obsession with Dimensionless Numbers

June 8, 2021

I’ve had a long love affair with dimensionless numbers. In hydraulics in particular and transport phenomena in general, dimensionless numbers help..

What Happens when the Pressure Gets Really Low?

June 1, 2021

In most of our water distribution modeling, we use a demand-driven approach. The user enters a demand, and the model calculates the flows and..

Variable vs. Constant Speed Pumps

May 26, 2021

The most common question in pump selection these days is whether to use variable or constant speed pumps.

How to Automate and Optimize Hydraulic Modeling

May 21, 2021

Are you spending time on water distribution network modeling tasks that you wish could be automated or simplified?Whether you are an existing user..

Gravity vs. Pressure Sewers – Who Wins?

May 18, 2021

One of the most fundamental decisions made in wastewater collection system design is choosing between a gravity or pressure sewer system. (Yes,..

Law of Conservation of Ca (Rational Method version)

May 10, 2021

We all know that as two flows meet, according to the Law of Conservation of Mass, the resulting flow will be the sum of the two flows.