Tom Walski’s Post

In his latest blog - "Exactly How Bad Is the Hazen-Williams Head Loss Equation for Water and Wastewater?" - Bentley expert Tom Walski explains the potential limitations of the equation and why there is no theoretically perfect equation for head loss when dealing with turbulent flow in #water and #wastewater systems. 💧 Read on for details. #engineering #headloss #hydraulicmodeling

Interesting post here below. H-W is most common here in the States from my experienece. I work in the water and wastewater industry. I recall being at a hydraulics conference right out of college and fell prey to the instructor who asked who was using D-W in their calculations. At the time I was, but I had no idea of H-W at time time. There's are some good information in this article and it helps to explain some of the difficulty we run into when trying to predict C-factors for pipes. A lot of times we end up combining the C & d factor (assuming a value for one adjusting the other) in the H-W equation since it is difficult to determine which one is contributing the the flow characteristic of the system curve. The bottom line is to understand your system and if you can live with the variation in predicted head in your hydraulic system. Great post!!!

I would like to share a simple PDF discussing water treatment processes and the challenges associated with treating raw water. Additionally a I provide a sample of the cost and profit for 50000 litters of water in a treatment plan #engineering #water_treatment

To owners of permeable pavement systems, those charged with maintaining these systems, and those charged with meeting regulatory compliance.... Is your permeable pavement BMP working better than you thought? How do you document better performance and take advantage of it? Do you need to conduct surface maintenance? Is the system infiltrating stormwater at the same rate today as it did five years ago? How much stormwater does your system "actually" capture? P4 Infrastructure, Inc has the answers - DIGITALIZATION. Take a look at the performance of a PaveDrain, LLC. intersection in Bladensburg, MD provided by Ernest Maier, Inc. A great complementary study by University of Maryland Department of Civil and Environmental Engineering outlines the benefits of measured data when evaluating performance of permeable pavement systems. DM me or contact P4 Infrastructure, Inc to learn more. #stormwater #stormwatermanagement #permeablepavement #INFILTracker

Glad that’s not from my water meter! In recent testing, I’ve seen quite a lot of debris and discolouration in water meters. Debris can affect the accuracy of metrology, and some designs of meter deal better with debris than others. But really, you don’t want debris or discoloured water getting to the customer endpoint at all. In one of those marvellous moments of Googling good luck, I landed immediately on Managing discolouration in drinking water distribution systems by integrating understanding of material behaviour https://lnkd.in/ezGHGGkq by Joby Boxall FREng, Mirjam Blokker, Peter Schaap, Vanessa Speight, and Stewart Husband of the Department of Civil and Structural Engineering at The University of Sheffield, UK; the KWR Water Research Institute, the Netherlands Delft University of Technology, the Netherlands; and Evides, the Netherlands. Their conclusions are: 1. Discolouration in drinking water distribution systems occurs owing to complex and interacting physical, chemical and biological processes within the vast, pipe surface dominated infrastructure. 2. Effective management of this issue requires an understanding of the dominant behaviour and a cleaning strategy to address it: a. Gravitational settling can dominate when particle size is relatively large and daily peak hydraulic forces relatively low. This is best addressed by flushing and a uni-directional flushing scheme ensures good results. b. Formation of cohesive layers on boundary surfaces of all pipes, irrespective of hydraulic conditions is best addressed by flow conditioning of trunk mains if the strategic importance and risks justify the detailed design, monitoring and automation necessary. 3. Cleaning strategies must be ongoing as there is a continual low level flux of material that will continually re-accumulate. Best practice will be a balance between controlling material source and periodic maintenance. 4. The rate of material accumulation or pipe fouling (deterioration) is a function of the bulk water quality in that pipe. More understanding is required to estimate this rate as a function of the water quality and chemical content, and how it will change if water quality and chemical content changes. 5. Understanding and quantification of the processes behind material accumulation is required to predict and control the rates of accumulation and hence inform the optimal balance between capital investments to improve bulk water quality and ongoing maintenance interventions.

Lovley summary Joel Hagan of a great paper. Discoloured water is a great passion of mine, and a chronic problem I have to put up with in my house because of the low level flux of material, predominantly iron. The grout in my shower turns orange! 🤮 We have cleaned it so much that we have worn away the grout and now need to re do it after only a year. As in the summary Unidirectional Flushing is a good way of removing discolouration customer contacts, but its not the most 💲 cost effective 💲. Unidirectional flushing might remove 70% of discolouration customer contacts in a DMA over a 12 month period but it could take two weeks to do. But what if you could remove 50% of your contacts with only two days work? Think of how many more DMAs you could cover for the same effort 🤔. Good Job WRc Group have already thought of it with our AI based Adaptive Flushing Plans!!! Have I got you thinking? 😎 DM me if you want to know more...... #discolouration, #waterquality, #assetmanagment

Hydraulic modeling can help engineers better understand interactions between #water and #infrastructure. This #StormwaterSolutions article looks at #hydraulic modeling approaches in #drainage design and water resources engineering using HEC-RAS: https://lnkd.in/gQn5A_Tu

Hydraulic modeling can help engineers better understand interactions between #water and #infrastructure. This #StormwaterSolutions article looks at #hydraulic modeling approaches in #drainage design and water resources engineering using HEC-RAS: https://lnkd.in/gQn5A_Tu

My Water Journey I am not a huge fan of water. As I have mentioned, I don't know how to swim and I have this fear of looking at bodies of water at night. During elementary and high school, I enjoyed reading about aquatic animals and different types of bodies of water. During college, of course I was introduced to fluid dynamics, hydrology and hydraulics, and other water - related subjects. It was not my cup of tea. Even during the boards, it was my waterloo, as I know I only got enough correct answers to pass. During my interview with my first engineering job, the question of my future boss was "what subject do you think you are weakest at?". Of course, in all honesty, I replied "anything about water". so to cut the story short, I was hired and became part of the water department. Although at first I tried to practice structural analysis, I was tasked to concentrate on water design, particularly hydropower. From detailed design to project management, until commissioning and testing, I became part of a milestone project. After that, I began exploring the other facets of water resources. From bulk and water supply, to irrigation, then flood control, and before I realized, I am now loving the water resources. I took me almost 2 decades to finally admit that I have found my specialization. I enriched myself in understanding what a water resources engineer is, and now working on getting my MS. Soon, I'll be applying for a lifetime membership from PICE so that I can be an accredited Water Resources Engineer. It was not a walk in the park. There were, and still, times when I wanted to give up. But I am still toiling and pushing. I have my own pace and I want to enjoy this romance with water. It may take longer than others, but I am 100% sure that I'll always be in love with water.

As water engineers we know how challenging it can be working on projects using different units - constantly changing between imperial to metric or metric to imperial. Our free water unit converter tool was developed to save you time by allowing you to quickly create a wide range of water and wastewater related conversions specific to your treatment project needs. By creating a hub for water and wastewater unit conversion you can increase the efficiency of your engineering work – water & wastewater projects, treatment designs, unit conversions, and water engineering calculations. Check it out here: https://lnkd.in/gXJk4YbF #wastewater #water #engineering #generativedesign #GenExplore