Dissertation/Thesis
Development of a Steady-State River Hydrodynamic and Temperature Model Based on CE-QUAL-W2
| Τίτλος: | Development of a Steady-State River Hydrodynamic and Temperature Model Based on CE-QUAL-W2 |
|---|---|
| Συγγραφείς: | Xu, Wenwei |
| Πηγή: | Dissertations and Theses |
| Στοιχεία εκδότη: | PDXScholar |
| Έτος έκδοσης: | 2014 |
| Συλλογή: | Portland State University: PDXScholar |
| Θεματικοί όροι: | Hydrodynamics -- Mathematical models -- Case studies, Water quality -- Mathematical models, Water temperature -- Mathematical models, Water Resource Management |
| Περιγραφή: | 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 is relaxed and simulations can proceed at much higher time steps. The rest of the model framework is still used for water quality state variables, in this case, temperature. The algorithm used for computing the water surface elevation is Manning's equation. This thesis study is one part of the Willamette Water 2100 project (Santelmann et al., 2012), which examines hydrological, ecological, and human factors affecting water scarcity in the Willamette River Basin. This study included three stages: (1) Convert six existing CE-QUAL-W2 V3.1 models into a newer version: CE-QUAL-W2 V3.7. (2) Develop the steady-state model code in FORTRAN. (3) Test the steady-state model on three river systems in the Willamette River Basin at Year 2001 and 2002. The result proved that the steady-state model could reduce the computing time by 90% for river applications, while predicting dynamic river temperature with high accuracy at a two-minute time scale. This new model will be employed to simulate the future of the Willamette River System at a decadal or centennial timescales, addressing river temperature concerns and fish habitat issues. |
| Τύπος εγγράφου: | Thesis |
| Περιγραφή αρχείου: | application/pdf |
| Γλώσσα: | English |
| Relation: | https://pdxscholar.library.pdx.edu/open_access_etds/1619; https://pdxscholar.library.pdx.edu/context/open_access_etds/article/2618/viewcontent/Xu_psu_0180E_11015.pdf |
| DOI: | 10.15760/etd.1618 |
| Διαθεσιμότητα: | https://pdxscholar.library.pdx.edu/open_access_etds/1619 https://doi.org/10.15760/etd.1618 https://pdxscholar.library.pdx.edu/context/open_access_etds/article/2618/viewcontent/Xu_psu_0180E_11015.pdf |
| Rights: | In Copyright. URI: http://rightsstatements.org/vocab/InC/1.0/ This Item is protected by copyright and/or related rights. You are free to use this Item in any way that is permitted by the copyright and related rights legislation that applies to your use. For other uses you need to obtain permission from the rights-holder(s). |
| Αριθμός Καταχώρησης: | edsbas.F5844507 |
| Βάση Δεδομένων: | BASE |
| FullText | Text: Availability: 0 CustomLinks: – Url: https://pdxscholar.library.pdx.edu/open_access_etds/1619# Name: EDS - BASE (ns324271) Category: fullText Text: View record from BASE |
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| Items | – Name: Title Label: Title Group: Ti Data: Development of a Steady-State River Hydrodynamic and Temperature Model Based on CE-QUAL-W2 – Name: Author Label: Authors Group: Au Data: <searchLink fieldCode="AR" term="%22Xu%2C+Wenwei%22">Xu, Wenwei</searchLink> – Name: TitleSource Label: Source Group: Src Data: Dissertations and Theses – Name: Publisher Label: Publisher Information Group: PubInfo Data: PDXScholar – Name: DatePubCY Label: Publication Year Group: Date Data: 2014 – Name: Subset Label: Collection Group: HoldingsInfo Data: Portland State University: PDXScholar – Name: Subject Label: Subject Terms Group: Su Data: <searchLink fieldCode="DE" term="%22Hydrodynamics+--+Mathematical+models+--+Case+studies%22">Hydrodynamics -- Mathematical models -- Case studies</searchLink><br /><searchLink fieldCode="DE" term="%22Water+quality+--+Mathematical+models%22">Water quality -- Mathematical models</searchLink><br /><searchLink fieldCode="DE" term="%22Water+temperature+--+Mathematical+models%22">Water temperature -- Mathematical models</searchLink><br /><searchLink fieldCode="DE" term="%22Water+Resource+Management%22">Water Resource Management</searchLink> – Name: Abstract Label: Description Group: Ab Data: 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 is relaxed and simulations can proceed at much higher time steps. The rest of the model framework is still used for water quality state variables, in this case, temperature. The algorithm used for computing the water surface elevation is Manning's equation. This thesis study is one part of the Willamette Water 2100 project (Santelmann et al., 2012), which examines hydrological, ecological, and human factors affecting water scarcity in the Willamette River Basin. This study included three stages: (1) Convert six existing CE-QUAL-W2 V3.1 models into a newer version: CE-QUAL-W2 V3.7. (2) Develop the steady-state model code in FORTRAN. (3) Test the steady-state model on three river systems in the Willamette River Basin at Year 2001 and 2002. The result proved that the steady-state model could reduce the computing time by 90% for river applications, while predicting dynamic river temperature with high accuracy at a two-minute time scale. This new model will be employed to simulate the future of the Willamette River System at a decadal or centennial timescales, addressing river temperature concerns and fish habitat issues. – Name: TypeDocument Label: Document Type Group: TypDoc Data: Thesis – Name: Format Label: File Description Group: SrcInfo Data: application/pdf – Name: Language Label: Language Group: Lang Data: English – Name: NoteTitleSource Label: Relation Group: SrcInfo Data: https://pdxscholar.library.pdx.edu/open_access_etds/1619; https://pdxscholar.library.pdx.edu/context/open_access_etds/article/2618/viewcontent/Xu_psu_0180E_11015.pdf – Name: DOI Label: DOI Group: ID Data: 10.15760/etd.1618 – Name: URL Label: Availability Group: URL Data: https://pdxscholar.library.pdx.edu/open_access_etds/1619<br />https://doi.org/10.15760/etd.1618<br />https://pdxscholar.library.pdx.edu/context/open_access_etds/article/2618/viewcontent/Xu_psu_0180E_11015.pdf – Name: Copyright Label: Rights Group: Cpyrght Data: In Copyright. URI: http://rightsstatements.org/vocab/InC/1.0/ This Item is protected by copyright and/or related rights. You are free to use this Item in any way that is permitted by the copyright and related rights legislation that applies to your use. For other uses you need to obtain permission from the rights-holder(s). – Name: AN Label: Accession Number Group: ID Data: edsbas.F5844507 |
| PLink | https://search.ebscohost.com/login.aspx?direct=true&site=eds-live&db=edsbas&AN=edsbas.F5844507 |
| RecordInfo | BibRecord: BibEntity: Identifiers: – Type: doi Value: 10.15760/etd.1618 Languages: – Text: English Subjects: – SubjectFull: Hydrodynamics -- Mathematical models -- Case studies Type: general – SubjectFull: Water quality -- Mathematical models Type: general – SubjectFull: Water temperature -- Mathematical models Type: general – SubjectFull: Water Resource Management Type: general Titles: – TitleFull: Development of a Steady-State River Hydrodynamic and Temperature Model Based on CE-QUAL-W2 Type: main BibRelationships: HasContributorRelationships: – PersonEntity: Name: NameFull: Xu, Wenwei IsPartOfRelationships: – BibEntity: Dates: – D: 01 M: 01 Type: published Y: 2014 Identifiers: – Type: issn-locals Value: edsbas Titles: – TitleFull: Dissertations and Theses Type: main |
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