Manzano, Julia

Ms. Manzano has supported multiple project teams in a variety of capacities with a focus in I/I analysis and quantification, data evaluations, hydraulic/hydrologic modeling, and has been actively involved in multiple stages of the Lehigh County Authority model development and alternatives analysis. She also provides modeling support through calibrations and quarterly model vaulting activities for the Metropolitan Sewer District of Greater Cincinnati, where she resides. Outside of the office, Ms. Manzano serves as Co-Chair of the Southwest Ohio Water Environment Associations YP committee.

Titles from this speaker

Assessing Rehabilitation Techniques Through Hydraulic Modeling

Abstract

Purpose Collection system modeling is traditionally completed to assess network condition, achieve infiltration and inflow (I/I) removal, evaluate alternatives, and to develop source reduction programs (SRPs). Eight SRPs were developed for the Kline's Island Sewer System (KISS) to assess the impact of different I/I elimination strategies, and each was incorporated into a scenario of the hydrological/hydraulic model by adjusting the contributing runoff surface values and base infiltration accordingly. I/I reductions were derived from a compendium of rehabilitation effectiveness studies and performance metrics collected over the last 20 years that classified a diverse range of rehabilitation techniques (nearly 30) by effectiveness reduction percentage for the four contributing runoff surfaces. Benefits of Presentation This is a novel method for modeling the impacts of manhole, main, tap, riser, lateral, and private-side sewer rehabilitation techniques. This presentation is relevant to programs that use modeling to assess impact of rehabilitation techniques on sewer baseline infiltration and peak wet weather flows. This method allows for countless rehabilitation strategies to be applied to a model and further evaluated, especially if meaningful assessment of the underlying flow data are also conducted to identify the most effective technique to apply on a catchment by catchment basis. This provides insight on how to develop a catchment-tailored SRP that optimizes cost and I/I reduction, including the ability to differentiate between inflow and rainfall induced infiltration, thereby reducing capital expansion projects. Status of Completion The project team successfully used this modeling method to create eight unique SRPs, utilizing various types and amounts of rehabilitation techniques. These were applied to over 40 modeled alternatives followed by costing exercises to quantify the capital, operating, and replacement life cycle cost of each alternative with the respective SRP applied. The final alternatives provided options that leveraged the benefits of rehabilitation in order to eliminate nine large capital expansion projects. Conclusion The final alternatives provided options that leveraged the benefits of rehabilitation in order to eliminate nine large capital expansion projects.

This paper was presented at the WEF Collection Systems and Stormwater Conference, April 9-12, 2024.

SpeakerManzano, Julia

Presentation time

08:30:00

09:00:00

Session time

08:30:00

11:45:00

SessionModeling

Session number25

Session locationConnecticut Convention Center, Hartford, Connecticut