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Comparison of Diversions and Impound...

Spangler, Margaret Jane.

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Comparison of Diversions and Impoundments on Downstream Water Quality and Ecosystem Processes.

Record Type:	Electronic resources : Monograph/item
Title/Author:	Comparison of Diversions and Impoundments on Downstream Water Quality and Ecosystem Processes./
Author:	Spangler, Margaret Jane.
Published:	Ann Arbor : ProQuest Dissertations & Theses, : 2019,
Description:	108 p.
Notes:	Source: Masters Abstracts International, Volume: 81-06.
Contained By:	Masters Abstracts International81-06.
Subject:	Aquatic sciences. -
Online resource:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=22617658
ISBN:	9781687941978

Comparison of Diversions and Impoundments on Downstream Water Quality and Ecosystem Processes.
Spangler, Margaret Jane.

Comparison of Diversions and Impoundments on Downstream Water Quality and Ecosystem Processes. - Ann Arbor : ProQuest Dissertations & Theses, 2019 - 108 p.

Source: Masters Abstracts International, Volume: 81-06.

Thesis (M.S.)--University of Colorado at Boulder, 2019.

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

Water resources infrastructure, such as impoundments and diversions, is expected to expand in order to supply water for an increasing population living in a drier west. River impoundments and diversions, termed discontinuities, are known to disrupt natural gradients and processes, causing a shift in the balance between water rescources supply and riverine ecosystem services. Deep-release reservoirs and their effects on river processes have been well-studied, but few studies quantify the effects of diversions and surface-release impoundments on water quality and ecosystem processes. Due to the effects of seasonal and climatic variations on river hydrographs, it is important to understand the impacts of discontinuities within the same basin and temporals scale. I deployed sensors upstream and downstream of two deep-release impoundments, one surface- release impoundment, one hydroelectric diversion (power diversion), and one irrigation diversion to understand the relative effects of these projects on river dissolved oxygen (DO), DO saturation, temperature, and specific conductivity (SpC) as well as these water quality relationships with discharge and temperature. Impoundments had an overall greater effect on downstream water quality than diversions. Additionally, water-quality-discharge relationships became weaker downstream of both deep-release impoundments while these relationships did not shift as significantly downstream of the surface-release impoundment and diversions. The irrigation diversion had a larger effect on temperature, DO, and metabolism at lower flows. Combined with model results of downstream temperature changes, this suggests that my results do not capture the largest effect of the irrigation downstream water quality. This combined with a correlation between temperature and DO saturation at low flow suggest that the irrigation diversion has the potential to stimulate ecosystem activity at low flows, especially if they occurred during the predicted warmer temperatures in the future. Adding additional infrastructure to provide water sustainability will exacerbate the compounding effects of these discontinuities within the river network require strategic monitoring and adaptive management in order to maintain ecosystem services provided by rivers.

ISBN: 9781687941978Subjects--Topical Terms:

3174300
Aquatic sciences.

Comparison of Diversions and Impoundments on Downstream Water Quality and Ecosystem Processes.
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300 $a 108 p.
500 $a Source: Masters Abstracts International, Volume: 81-06.
500 $a Advisor: Gooseff, Michael N.
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506 $a This item must not be sold to any third party vendors.
520 $a Water resources infrastructure, such as impoundments and diversions, is expected to expand in order to supply water for an increasing population living in a drier west. River impoundments and diversions, termed discontinuities, are known to disrupt natural gradients and processes, causing a shift in the balance between water rescources supply and riverine ecosystem services. Deep-release reservoirs and their effects on river processes have been well-studied, but few studies quantify the effects of diversions and surface-release impoundments on water quality and ecosystem processes. Due to the effects of seasonal and climatic variations on river hydrographs, it is important to understand the impacts of discontinuities within the same basin and temporals scale. I deployed sensors upstream and downstream of two deep-release impoundments, one surface- release impoundment, one hydroelectric diversion (power diversion), and one irrigation diversion to understand the relative effects of these projects on river dissolved oxygen (DO), DO saturation, temperature, and specific conductivity (SpC) as well as these water quality relationships with discharge and temperature. Impoundments had an overall greater effect on downstream water quality than diversions. Additionally, water-quality-discharge relationships became weaker downstream of both deep-release impoundments while these relationships did not shift as significantly downstream of the surface-release impoundment and diversions. The irrigation diversion had a larger effect on temperature, DO, and metabolism at lower flows. Combined with model results of downstream temperature changes, this suggests that my results do not capture the largest effect of the irrigation downstream water quality. This combined with a correlation between temperature and DO saturation at low flow suggest that the irrigation diversion has the potential to stimulate ecosystem activity at low flows, especially if they occurred during the predicted warmer temperatures in the future. Adding additional infrastructure to provide water sustainability will exacerbate the compounding effects of these discontinuities within the river network require strategic monitoring and adaptive management in order to maintain ecosystem services provided by rivers.
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