Hydraulics & Hydrology
Hydraulics & Hydrology Recent Articles
One of the first papers documenting the occurrence of negative transient pressure in water distribution systems was Walski and Lutes “Hydraulic transients cause low-pressure problems” (Journal AWWA) based on some work we did in Austin around 1990. There have been...
It was a rainy Friday afternoon, back when I was executive director of the Wyoming Valley Sanitary Authority, a regional wastewater system. We had a long force main along the river that intercepted flow from several municipal pump stations along...
Learn about the 3 most common reasons to flush a water distribution systems: scour solids, move higher quality water, and remove contamination....
Notice that I said system head curve (not curves). We know that the system head curve is not a single curve but a band of curves depending on the water level in the wet well and pressure in the force...
Another issue lies in the personas who are asking and answering the question. Usually the decision maker (i.e. design engineer or system operator) will ask the modeler, “Is this model calibrated?,” and expect the modeler to answer yes or no....
Create hydraulic structures in a breeze with Bentley’s OpenFlows FlowMaster. Suppose you know the characteristics of a gravity sewer, but you’d like to know the percent full and Froude number when it carries 20 L/s. You can dig out your...