WQS provided technical support to the City of San Diego in assessing the water quality effects of augmenting Miramar Reservoir with highly treated purified water by designing tracer studies and employing the three-dimensional AEM3D water quality model, the successor to the ELCOM/CAEDYM model. This project has received regulatory approval and is under construction.
WQS completed a project for the City of San Diego to assess the effects of augmenting the reservoir by adding highly treated purified water. This involved detailed water quality analysis and support for implementing a data sampling plan. This project received concept approval from the California Division of Drinking Water and is being considered as the location for Phase II of San Diego Pure Water.
WQS completed a project for the City of San Diego to assess the effects of Pumped Storage (PS) operation on the water quality in San Vicente Reservoir under different operating scenarios. This involved modeling that predicted effects of pumped storage on mixing. The model shows no significant water quality changes due to pumped storage.
WQS provided technical support to the City of San Diego in performing a tracer study in Otay and Miramar Reservoirs. This work involved identifying an injection site, data collection plan, and time-frame for a hydrodynamic tracer study. This study validated hydrodynamic models, as verified by an independent advisory panel.
This investigation evaluated the viability of various hypolimnetic oxygenation systems (HOS) in the lake for Casitas Municipal Water District. Three oxygenation systems were evaluated: Speece Cone, Diffused Oxygenation, and an SDOX® system. Diffused Oxygenation was identified as the best alternative due to favorable costs and ease of implementation. The project was constructed in 2015 and has been operating successfully through the present.
WQS has performed detailed water quality data analysis and support for implementing a data sampling plan for the Casitas Municipal Water District since 2012. WQS recently analyzed the effects of the Thomas Fire on water quality in the lake and its watershed, and explored the fire effects on disinfection by-product levels in the water distribution system.
WQS developed a three-dimensional water quality model of the lake using AEM3D for the City of San Diego and the San Diego County Water Authority. The model evaluated the benefits of a hypolimnetic oxygenation system (HOS) and assessed the impacts of watershed nutrient reduction and mixing on the lake’s water quality, including algal productivity and dissolved oxygen levels. These results were used to assist in evaluating the benefits of an HOS.
WQS’s Imad Hannoun acted as subject matter expert in producing a “best practices guidance manual” for performing tracer studies and validating hydrodynamic models for indirect potable reuse (IPR). The project was funded by US Bureau of Reclamation and included a full-scale tracer study. The resulting manual will be available in late 2020.
WQS provided technical support to the Metropolitan Water District of Southern California in analyzing water quality data including dissolved oxygen, chlorophyll a, zooplankton, and algal composition in Diamond Valley Lake. Recommendations were provided regarding future lake operations and water quality monitoring.
WQS performed Computational Fluid Dyamics (CFD) modeling using Fluent® for clarifiers for Waterworks Engineers on behalf of Salt Lake City Public Utilities. The modeling adressed various aspects of sludge settling and evaluated potential design modifications. This modeling identified the best clarifier design for the client.
WQS's Imad Hannoun acted as a science advisor and co-author of the Lake George State of the Lake Report by The Fund For Lake George, outlining threats from invasive species, rising salt levels, and declining water quality and clarity. This study examined changes to the lake over a 30-year period and identified strategies for future lake management such as curbing major nutrient and contaminant sources.
WQS performed Computational Fluid Dyamics (CFD) modeling using Fluent® for Waterworks Engineers on behalf of the City of Scottsdale to address reservoir mixing. This study evaluated potential modifications to the inlet/outlet design to improve water mixing, and identified an optimal inlet design for the reservoir.
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