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Coupling Ecosystem Rehabilitation to...

Jackwood, Ryan Walter.

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Coupling Ecosystem Rehabilitation to Water Quality Improvements in the Wolf Creek Watershed.

Record Type:	Electronic resources : Monograph/item
Title/Author:	Coupling Ecosystem Rehabilitation to Water Quality Improvements in the Wolf Creek Watershed./
Author:	Jackwood, Ryan Walter.
Published:	Ann Arbor : ProQuest Dissertations & Theses, : 2019,
Description:	169 p.
Notes:	Source: Dissertations Abstracts International, Volume: 81-06, Section: B.
Contained By:	Dissertations Abstracts International81-06B.
Subject:	Ecology. -
Online resource:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=27602931
ISBN:	9781687976574

Coupling Ecosystem Rehabilitation to Water Quality Improvements in the Wolf Creek Watershed.
Jackwood, Ryan Walter.

Coupling Ecosystem Rehabilitation to Water Quality Improvements in the Wolf Creek Watershed. - Ann Arbor : ProQuest Dissertations & Theses, 2019 - 169 p.

Source: Dissertations Abstracts International, Volume: 81-06, Section: B.

Thesis (Ph.D.)--The University of Toledo, 2019.

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

Eutrophication and fecal contamination contribute to poor water quality and affect 1.8 billion people. My research focus is on two pollutants in Lake Erie: phosphorus, which drives the annual occurrence of harmful algal blooms, and Escherichia coli, an indicator of fecal contamination. The Wolf Creek watershed (41 km2) is a contributor of phosphorus to the western basin of Lake Erie and is the proximal source of E. coli to the Lake Erie beaches at Maumee Bay State Park. To lessen contaminant loadings from Wolf Creek, two watershed rehabilitation projects were implemented. This dissertation outlines my efforts as three chapters. Chapter 1 presents the history and impact of phosphorus and fecal contamination in western Lake Erie. Chapter 2 reports on the collection and analysis of baseline water quality data that were used to design two rehabilitation projects. Chapter 3 describes the implementation of the projects, an analysis of their effect on water quality, and an attempt to model the resultant improvements to water quality.Notable conclusions from each chapter are as follows:(1)Two means for improving water quality appropriate for Wolf Creek are a rehabilitated floodplain attained by widening the stream channel to trap suspended particles, attached E. coli and phosphorus and a rehabilitated subsurface flow wetland to reduce dissolved phosphorus and suspended bacteria.(2)Major discharge events and seasonal trends have a significant impact on loadings of phosphorus, E. coli, and suspended solids in Wolf Creek. To increase capacity during peak loading events a sedimentation basin was included in the rehabilitated floodplain to slow discharge events and settle particulates. Limestone was included in the rehabilitated wetland to increase adsorptive capacity of phosphorus.(3)Water samples indicated reductions in total suspended solids by 27.8% and 91.7%, total phosphorus by 16.6% and 74.1%, dissolved reactive phosphorus by 20.2% and 46.7%, and E. coli by 39.5% and 86.7% for the rehabilitated floodplain and wetland, respectively. Results were scaled and modeled for the Maumee River (important source of phosphorus to western Lake Erie) and indicated that a 1000 ha wetland would be sufficient to reduce DRP loadings by the IJC recommended 40%.

ISBN: 9781687976574Subjects--Topical Terms:

516476
Ecology.
Subjects--Index Terms:

Phosphorus

Coupling Ecosystem Rehabilitation to Water Quality Improvements in the Wolf Creek Watershed.
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520 $a Eutrophication and fecal contamination contribute to poor water quality and affect 1.8 billion people. My research focus is on two pollutants in Lake Erie: phosphorus, which drives the annual occurrence of harmful algal blooms, and Escherichia coli, an indicator of fecal contamination. The Wolf Creek watershed (41 km2) is a contributor of phosphorus to the western basin of Lake Erie and is the proximal source of E. coli to the Lake Erie beaches at Maumee Bay State Park. To lessen contaminant loadings from Wolf Creek, two watershed rehabilitation projects were implemented. This dissertation outlines my efforts as three chapters. Chapter 1 presents the history and impact of phosphorus and fecal contamination in western Lake Erie. Chapter 2 reports on the collection and analysis of baseline water quality data that were used to design two rehabilitation projects. Chapter 3 describes the implementation of the projects, an analysis of their effect on water quality, and an attempt to model the resultant improvements to water quality.Notable conclusions from each chapter are as follows:(1)Two means for improving water quality appropriate for Wolf Creek are a rehabilitated floodplain attained by widening the stream channel to trap suspended particles, attached E. coli and phosphorus and a rehabilitated subsurface flow wetland to reduce dissolved phosphorus and suspended bacteria.(2)Major discharge events and seasonal trends have a significant impact on loadings of phosphorus, E. coli, and suspended solids in Wolf Creek. To increase capacity during peak loading events a sedimentation basin was included in the rehabilitated floodplain to slow discharge events and settle particulates. Limestone was included in the rehabilitated wetland to increase adsorptive capacity of phosphorus.(3)Water samples indicated reductions in total suspended solids by 27.8% and 91.7%, total phosphorus by 16.6% and 74.1%, dissolved reactive phosphorus by 20.2% and 46.7%, and E. coli by 39.5% and 86.7% for the rehabilitated floodplain and wetland, respectively. Results were scaled and modeled for the Maumee River (important source of phosphorus to western Lake Erie) and indicated that a 1000 ha wetland would be sufficient to reduce DRP loadings by the IJC recommended 40%.
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