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Numerical Modeling of Floodplains: Evaluating Ecological Outcomes.

Record Type:	Electronic resources : Monograph/item
Title/Author:	Numerical Modeling of Floodplains: Evaluating Ecological Outcomes./
Author:	Tomkovic, Lily Ann.
Published:	Ann Arbor : ProQuest Dissertations & Theses, : 2022,
Description:	123 p.
Notes:	Source: Dissertations Abstracts International, Volume: 83-11, Section: B.
Contained By:	Dissertations Abstracts International83-11B.
Subject:	Water resources management. -
Online resource:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=28967439
ISBN:	9798438747000

Numerical Modeling of Floodplains: Evaluating Ecological Outcomes.
Tomkovic, Lily Ann.

Numerical Modeling of Floodplains: Evaluating Ecological Outcomes. - Ann Arbor : ProQuest Dissertations & Theses, 2022 - 123 p.

Source: Dissertations Abstracts International, Volume: 83-11, Section: B.

Thesis (Ph.D.)--University of California, Davis, 2022.

This item must not be sold to any third party vendors.

Rivers and their floodplains are a complex system that presents numerous challenges when coupled with human adaptation. The many adaptations humans have made to the landscape have come at the cost of aquatic ecology. Efforts have gone underway to mitigate those costs and begin to repair our relationship with the aquatic landscape via restoration and re-engineering systems to benefit habitat. Of the myriad of tools at our disposal to investigate different restoration strategies, this thesis explores the application of hydrodynamic models to ecosystems and how the linkages between numerical models can evaluate ecological outcomes.The application of this thesis has centered around the Sacramento-San Joaquin Delta, a focal point of California's Central Valley and a critical ecosystem in the state. The Sacramento-San Joaquin Delta has many "islands" which are essentially parcels of land that have levees surrounding them to protect against flooding from the Detla's channels. One island in the Delta is the McCormack-Williamson Tract, which lies just below the confluence of the Cosumnes and Mokelumne Rivers. The McCormack-Williamson Tract is the study area for Chapters 2 and 3, where a hydrodynamic model was develope and calibrated to investigate natural phenomena. The models were calibrated against observed flood events and then used to compare against field data collected in the study systems within the model calibration period. By pairing observed field data with replicated modeling data, linkages between source water distribution, age, and general hydrodynamic features were drawn. These linkages provide useful tools in the field of floodplain restoration engineering. Chapter 2 demonstrates a hydrodynamic model's ability to resolve the spatio-temporal distribution of the water from the convergence of the Mokelumne and Cosumnes Rivers as they advance through the McCormack-Williamson Tract and its surrounding channels and sloughs. This modeling effort was coupled with an isotopic mixing model using water sampling in the study area, and shows that the two methods agree on source water distribution. The subsequent chapter (Chapter 3) that focuses on the McCormack-Williamson Tract evaluates a modeled water age against field-collected zooplankton abundance. Although this study did not find a robust relationship between the two variables, the chapter lays out the methodology used to investigate the relationship. The second study area centered around a key feature in the Delta's hydrography - the Yolo Bypass. The Yolo Bypass is a major floodplain to convey flood waters from the Feather, American, and Sacramento Rivers around major cities and dwellings and into the Delta. Chapter 4 outlines the development and calibration of a model of the Yolo Bypass and discusses the applications the model can have to answer ongoing questions about the study system.

ISBN: 9798438747000Subjects--Topical Terms:

794747
Water resources management.
Subjects--Index Terms:

Aquatic ecology

Numerical Modeling of Floodplains: Evaluating Ecological Outcomes.
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500 $a Source: Dissertations Abstracts International, Volume: 83-11, Section: B.
500 $a Advisor: Bombardelli, Fabian A.
502 $a Thesis (Ph.D.)--University of California, Davis, 2022.
506 $a This item must not be sold to any third party vendors.
520 $a Rivers and their floodplains are a complex system that presents numerous challenges when coupled with human adaptation. The many adaptations humans have made to the landscape have come at the cost of aquatic ecology. Efforts have gone underway to mitigate those costs and begin to repair our relationship with the aquatic landscape via restoration and re-engineering systems to benefit habitat. Of the myriad of tools at our disposal to investigate different restoration strategies, this thesis explores the application of hydrodynamic models to ecosystems and how the linkages between numerical models can evaluate ecological outcomes.The application of this thesis has centered around the Sacramento-San Joaquin Delta, a focal point of California's Central Valley and a critical ecosystem in the state. The Sacramento-San Joaquin Delta has many "islands" which are essentially parcels of land that have levees surrounding them to protect against flooding from the Detla's channels. One island in the Delta is the McCormack-Williamson Tract, which lies just below the confluence of the Cosumnes and Mokelumne Rivers. The McCormack-Williamson Tract is the study area for Chapters 2 and 3, where a hydrodynamic model was develope and calibrated to investigate natural phenomena. The models were calibrated against observed flood events and then used to compare against field data collected in the study systems within the model calibration period. By pairing observed field data with replicated modeling data, linkages between source water distribution, age, and general hydrodynamic features were drawn. These linkages provide useful tools in the field of floodplain restoration engineering. Chapter 2 demonstrates a hydrodynamic model's ability to resolve the spatio-temporal distribution of the water from the convergence of the Mokelumne and Cosumnes Rivers as they advance through the McCormack-Williamson Tract and its surrounding channels and sloughs. This modeling effort was coupled with an isotopic mixing model using water sampling in the study area, and shows that the two methods agree on source water distribution. The subsequent chapter (Chapter 3) that focuses on the McCormack-Williamson Tract evaluates a modeled water age against field-collected zooplankton abundance. Although this study did not find a robust relationship between the two variables, the chapter lays out the methodology used to investigate the relationship. The second study area centered around a key feature in the Delta's hydrography - the Yolo Bypass. The Yolo Bypass is a major floodplain to convey flood waters from the Feather, American, and Sacramento Rivers around major cities and dwellings and into the Delta. Chapter 4 outlines the development and calibration of a model of the Yolo Bypass and discusses the applications the model can have to answer ongoing questions about the study system.
590 $a School code: 0029.
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650 4 $a Ecology. $3 516476
653 $a Aquatic ecology
653 $a Floodplain
653 $a Hydrodynamic modeling
653 $a Stable isotopes
653 $a Water age
653 $a Zooplankton
690 $a 0595
690 $a 0329
710 2 $a University of California, Davis. $b Civil and Environmental Engineering. $3 1671151
773 0 $t Dissertations Abstracts International $g 83-11B.
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791 $a Ph.D.
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793 $a English
856 4 0 $u http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=28967439