Clearing up the confusion on copyright and ownership of models, equations, programs and publications. The antecedent moisture model (AMM) has recently been placed in the public domain. What does that really mean? What rights do you have to use the AMM, and how does...

Modeling Rainfall Runoff Responses and Antecedent Moisture Effects Using Principles of System Identification. Abstract Rainfall-runoff dynamics of surface water, combined sewer, and separate sewer systems can be highly impacted by antecedent moisture conditions, i.e....

Introduction Antecedent moisture (AM) conditions, or the relative wetness or dryness of a system, can have a tremendous impact on rainfall-runoff dynamics. The magnitude of the runoff (flow) from rainfall can be affected by how wet the drainage area is from prior...

I recently had the pleasure of presenting in a webinar on channel roughness (here is a link to webinar video) for the Australian Water School's training arm called ICE WaMR (International Centre of Excellence in Water Resources Management). My portion of the webinar...

An advanced approach to predicting wet-weather flows in sanitary sewers that incorporates antecedent moisture effects and long-term climate data. This article provides an overview of antecedent moisture effects and the antecedent moisture model. Additional references...

Over the past several years, I've slowly been building out my smart home. It started with a Nest Thermostat in 2012. Then several years went by and I tested out a couple of smart switches for the basement. When those were easy to install and worked well, I was...

Sewer flow meters can be very laborious and expensive to maintain. Regular meter services and spot check measurements can quickly eat up your metering budget. This article outlines how the use of data analytics can optimize your metering accuracy and servicing costs....

Verifying the accuracy of sewer flow meter data can be very important for applications such as billing or capital planning. Dye testing is one data QA/QC method to provide an independent check on the accuracy of a flow meter. Dye test results can even be used to...

You have decided to embark on a flow metering project in your sewer system, perhaps to develop design peak flows or to perform an I&I analysis. Flow metering can be expensive and mother nature does not always cooperate with providing good rainfall events. So it is...

The Manning equation is a widely used and very versatile formula in water resources. It can be used to compute the flow in an open channel, compute the friction losses in a channel, derive the capacity of a pipe, check the performance of an area-velocity flow meter,...