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Rozprawy doktorskie na temat „CE-QUAL-W2 model”

Autor: Grafiati

Data publikacji: 3 czerwca 2025

Data aktualizacji: 31 lipca 2025

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Shojaei, Nasim. "Automatic Calibration of Water Quality and Hydrodynamic Model (CE-QUAL-W2)." PDXScholar, 2014. https://pdxscholar.library.pdx.edu/open_access_etds/1942.

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One of the most important purposes of surface water resource management is to develop predictive models to assist in identifying and evaluating operational and structural measures for improving water quality. To better understand the effects of external and internal nutrient and organic loading and the effects of reservoir operation, a model is often developed, calibrated, and used for sensitivity and management simulations. The importance of modeling and simulation in the scientific community has drawn interest towards methods for automated calibration. This study addresses using an automatic

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Xu, Wenwei. "Development of a Steady-State River Hydrodynamic and Temperature Model Based on CE-QUAL-W2." PDXScholar, 2014. https://pdxscholar.library.pdx.edu/open_access_etds/1619.

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CE-QUAL-W2 is a 2-D hydrodynamic and water quality model that has been applied to reservoirs, lakes, river systems, and estuaries throughout the world. However, when this model is applied for shallow systems, this model requires a long calculation time to maintain numerical stability, compared to applications of reservoirs or deeper river systems. To solve this problem, a new hydrodynamic and temperature model was built based on the framework of CE-QUAL-W2 but that allows for steady-state hydrodynamic computations. By calculating the hydrodynamics at steady-state, the time step for stability i

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McCulloch, Andrew John. "Developing and Calibrating the Hydrodynamic and Water Quality Model CE-QUAL-W2 for Banks Lake Washington." PDXScholar, 2011. https://pdxscholar.library.pdx.edu/open_access_etds/180.

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Located in central Washington State, Banks Lake serves as an irrigation storage reservoir for the Columbia Basin Irrigation Project and is home to a diverse fisheries population. The current hydrologic management strategies used for Banks Lake have been chosen to serve two purposes: to adequately store and provide irrigation water for the Columbia Basin Irrigation Project and to maintain a healthy aquatic environment suitable for the growth and habitation of local flora and fauna. Increased needs for irrigation water within arid central Washington poses additional challenges to reservoir manag

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Wells, Vanessa I. "CE-QUAL-W2 Water Quality and Fish-bioenergetics Model of Chester Morse Lake and the Cedar River." PDXScholar, 2011. https://pdxscholar.library.pdx.edu/open_access_etds/324.

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Many communities are currently seeking to balance urban water needs with preservation of sensitive fish habitat. As part of that effort, CE-QUAL-W2, a hydrodynamic and temperature model, was developed for Chester Morse Lake and the lower Cedar River, WA. Chester Morse Lake is approximately 10 km long with a maximum depth at full pool of 40 m. The Cedar River model started immediately downstream of the Chester Morse dam and ended 21 km downstream at Landsburg, where drinking water is diverted for the City of Seattle. This water quality model was coupled with a fish habitat and bioenergetics mod

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Xu, Zhongyan. "A Complex, Linked Watershed-Reservoir Hydrology and Water Quality Model Application for the Occoquan Watershed, Virginia." Diss., Virginia Tech, 2005. http://hdl.handle.net/10919/37186.

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The Occoquan Watershed is a 1515 square kilometer basin located in northern Virginia and contains two principal waterbodies: the Occoquan Reservoir and Lake Manassas. Both waterbodies are principal drinking water supplies for local residents and experience eutrophication and summer algae growth. They are continuously threatened by new development from the rapid expansion of the greater Washington D.C. region. The Occoquan model, consisting of six HSPF and two CE-QUAL-W2 submodels linked in a complex way, has been developed and applied to simulate hydrology and water quality activities in the t

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Liu, Yingmei. "Effective Modeling of Nutrient Losses and Nutrient Management Practices in an Agricultural and Urbanizing Watershed." Diss., Virginia Tech, 2011. http://hdl.handle.net/10919/40398.

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The Lake Manassas Watershed is a 189 km2 basin located in the Northern Virginia suburbs of Washington, DC. Lake Manassas is a major waterbody in the watershed and serves as a drinking water source for the City of Manassas. Lake Manassas is experiencing eutrophication due to nutrient loads associated with agricultural activities and urban development in its drainage areas. Two watershed model applications using HSPF, and one receiving water quality model application using CE-QUAL-W2, were linked to simulate Lake Manassas as well as its drainage areas: the Upper Broad Run (126.21 km2) and Middle

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McKillip, Michael Lee. "Coupling the Hydrodynamic and Water Quality Model CE-QUAL-W2 With a Multi-Trophic Fish Bio-Energetics Model for Lake Roosevelt, Washington." PDXScholar, 2008. https://pdxscholar.library.pdx.edu/open_access_etds/3078.

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Grand Coulee Dam created Franklin D. Roosevelt Lake as part of the Columbia Basin Project. Located in northeastern Washington State, the Project provides economically important hydropower (19 billion kilowatt hours per year), irrigation (225,000 ha), flood control, and sport fishing ($5 to 20 million annually). A good system understanding aids in balancing these beneficial uses for the 230 km long reservoir. The reservoir's atypical 45-day mean residence time is much shorter than a typical lake, and much longer than for a riverine dam. The spring freshet requires drawdowns of 15 to 20 m for fl

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Salah, Ahmad Mohamad. "Stochastic Spatio-Temporal Uncertainty in GIS-Based Water Quality Modeling of the Land Water Interface." BYU ScholarsArchive, 2009. https://scholarsarchive.byu.edu/etd/1837.

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Integrated water resources management has been used for decades in various formats. The limited resources and the ever growing population keep imposing pressure on decision makers to better-, and reliably, manage the available waters. On the other hand, the continuous development in computing and modeling power has helped modelers and decision makers considerably. To use these models, assumptions have to be made to fill in the gaps of missing data and to approximate the current conditions. The type and amount of information available can also be used to help select the best model from the curr

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Van, Glubt Sarah. "Hydrodynamic and Water Quality Modeling of the Chehalis River Using CE-QUAL-W2." PDXScholar, 2017. https://pdxscholar.library.pdx.edu/open_access_etds/3486.

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The Chehalis River Basin is located in the southwest region of Washington State, originating in the Olympic Mountains and flowing to Grays Harbor and the Pacific Ocean. The Chehalis River is over 125 miles, exists within five counties, and flows through agricultural, residential, industrial, and forest land areas. Four major rivers discharge to the Chehalis River, as well as many smaller creeks, five wastewater treatment plants, and groundwater flows. Flooding is a major problem in the relatively flat areas surrounding the cities of Chehalis and Centralia, with severe consequences for property

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Al, Murib Muhanned. "Hydrodynamic and Water Quality Modeling of the Tigris River System in Iraq Using CE-QUAL-W2." PDXScholar, 2018. https://pdxscholar.library.pdx.edu/open_access_etds/4230.

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The Tigris River is one of two primary rivers in Iraq and is, along with the Euphrates, the main source for drinking and irrigation water in the country. The Tigris River originates in the Taurus Mountains in Turkey, and is 1850 km long. The majority of the river lies within Iraq. The river passes through, and is the primary drinking water source for major cities such as Mosul, Baeji, Samarra, Baghdad (the capital), and Kut. The Tigris River joins the Euphrates River in Qurna city within Basra province to form the Shatt Al-Arab River which eventually discharges into the Persian Gulf. As a resu

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Conterato, Taiane Menezes. "SIMULAÇÃO DA QUALIDADE DA ÁGUA DO RESERVATÓRIO DO VACACAÍ MIRIM UTILIZANDO O MODELO CE-QUAL-W2." Universidade Federal de Santa Maria, 2016. http://repositorio.ufsm.br/handle/1/7918.

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Coordenação de Aperfeiçoamento de Pessoal de Nível Superior<br>The pollution and inadequate use of waters are problems that have been discussed frequently, because the water is a limited resource, which needs better management and conservation. Mathematical models of water quality have been used to assist studies relating to lakes, rivers, reservoirs and estuaries. The CE-QUAL-W2 is a software that simulates the change in water quality in the vertical and horizontal directions, it has several resources, and has been used by many authors. In Santa Maria, the Vacacaí Mirim reservoir has great im

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Singleton, Vickie L. "Hypolimnetic Oxygenation: Coupling Bubble-Plume and Reservoir Models." Diss., Virginia Tech, 2008. http://hdl.handle.net/10919/26722.

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When properly designed, hypolimnetic aeration and oxygenation systems can replenish dissolved oxygen in water bodies while preserving stratification. A comprehensive literature review of design methods for the three primary devices was completed. Using fundamental principles, a discrete-bubble model was first developed to predict plume dynamics and gas transfer for a circular bubble-plume diffuser. This approach has subsequently been validated in a large vertical tank and applied successfully at full-scale to an airlift aerator as well as to both circular and linear bubble-plume diffusers.

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Souza, Rafael Siqueira. "Simulação hidrodinâmica da qualidade da água. Estudo de caso: ajuste do modelo CE-QUAL-W2 à sub-bacia do arroio Demétrio, bacia hidrográfica do rio Gravataí/RS." reponame:Biblioteca Digital de Teses e Dissertações da UFRGS, 2006. http://hdl.handle.net/10183/8756.

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Este trabalho buscou ampliar os estudos realizados na sub-bacia do Arroio Demétrio por De Luca et al. (2005), que aplicou o modelo permanente de qualidade da água QUAL2E, através da aplicação do modelo hidrodinâmico CE-QUAL-W2 à sub-bacia do Arroio Demétrio. Esta sub-bacia tem aproximadamente 252,0 km2 e faz parte da Bacia Hidrográfica do Rio Gravataí, Bacia Hidrográfica do Lago Guaíba, situando-se na porção norte da bacia, à margem direita do Rio Gravataí. Os dados dinâmicos foram obtidos através da leitura do linígrafo em uma das seções de amostragem (AD3), enquanto que os dados de qualidade

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ŠÁMALOVÁ, Klára. "Ověření použitelnosti modelu CE-QUAL-W2 pro simulaci růstu fytoplanktonu, epifytonu a makrofyt v nádrži Lipno." Master's thesis, 2008. http://www.nusl.cz/ntk/nusl-48969.

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Verification of applicability of the CE-QUAL-W2 model for simulation of phytoplankton, epiphyton and macrophyte growth in Lipno Reservoir was tested. The model was first calibrated for the year 2004, then was applicated to the whole investigated period from 1.1. 2000 to 31.12. 2005. Sensitivity analysis was executed for mean growth parameters of phytoplankton, periphyton and macrophytes.

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Chia-LingChung and 鍾佳玲. "Simulation and Analyses of the Climate Change Impact on the Water Quality with CE-QUAL-W2 model in Hsin-Shan reservoir." Thesis, 2014. http://ndltd.ncl.edu.tw/handle/xhzujt.

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碩士<br>國立成功大學<br>環境工程學系<br>102<br>Hsinshan Reservoir is a subtropical off-channel reservoir located in Keelung city, which supplies water to both Keelung and Taipei metropolitan areas. The limnion layers in this subtropical reservoir turn over twice a year during the spring and fall, inducing eutrophication during the spring and summertime. The objective of this study was three-fold, to investigate possible impacts of climate change on water quality within a subtropical off-channel reservoir. First, develop a two dimensional (x- and z-axes) CE-QUAL-W2 (W2) model to simulate water temperature,

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Yao, Chung-Kai, and 姚重愷. "Simulation and Analyses of the Effects of Hypolimnetic Aeration and Inflow Water Temperature on the Eutrophic Condition of Shin-Shan Reservoir by Using CE-QUAL-W2 Water Quality Model." Thesis, 2013. http://ndltd.ncl.edu.tw/handle/98418784514003597230.

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碩士<br>國立臺灣大學<br>環境工程學研究所<br>101<br>During the past few years, Shin-Shan Reservoir, an off-channel reservoir and major water source for Keelung city and a part of Taipei metropolitan area, became seriously eutrophic due to elevated pollutant loading and possibly more frequent extreme-climate events. In this study, CE-QUAL-W2 water quality model was used to evaluate the effects of hypolimnetic aeration on water quality of Shin-Shan reservoir and to investigate the impacts of the higher temperature of inflow water than in reservoir during unusual climate events on the water quality. The model wa

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