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Effects of environmental water right...

Mouzon, Nathaniel R.

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Effects of environmental water rights purchases on dissolved oxygen, stream temperature, and fish habitat.

Record Type:	Electronic resources : Monograph/item
Title/Author:	Effects of environmental water rights purchases on dissolved oxygen, stream temperature, and fish habitat./
Author:	Mouzon, Nathaniel R.
Published:	Ann Arbor : ProQuest Dissertations & Theses, : 2016,
Description:	112 p.
Notes:	Source: Masters Abstracts International, Volume: 55-06.
Contained By:	Masters Abstracts International55-06(E).
Subject:	Water resources management. -
Online resource:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=10141447
ISBN:	9781339968179

Effects of environmental water rights purchases on dissolved oxygen, stream temperature, and fish habitat.
Mouzon, Nathaniel R.

Effects of environmental water rights purchases on dissolved oxygen, stream temperature, and fish habitat. - Ann Arbor : ProQuest Dissertations & Theses, 2016 - 112 p.

Source: Masters Abstracts International, Volume: 55-06.

Thesis (M.S.)--Utah State University, 2016.

Human impacts from land and water development have degraded water quality and altered the physical, chemical, and biological integrity of Nevada's Walker River. Reduced instream flows and increased nutrient concentrations affect native fish populations through warm daily stream temperatures and low nightly dissolved oxygen concentrations. Environmental water purchases are being considered to maintain instream flows, improve water quality, and enhance habitat for native fish species, such as Lahontan cutthroat trout. This study uses the River Modeling System (RMSv4), an hourly, physically-based hydrodynamic and water quality model, to estimate streamflows, temperatures, and dissolved oxygen concentrations in the Walker River. Stream temperature and dissolved oxygen changes were simulated from potential environmental water purchases to prioritize the time periods and locations that water purchases most enhance stream temperatures and dissolved oxygen concentrations for aquatic habitat. Environmental water purchases ranged from 0.03 cms to 1.41 cms average daily increases. Modeling results indicate that increased water purchases generally affect dissolved oxygen in two ways. First, environmental water purchases increase the thermal mass of the river, cooling daily stream temperatures and warming nightly temperatures. This prevents conditions that cause the lowest nightly dissolved oxygen concentrations (moderate production impairment thresholds are <5.0 mg/L and acute mortality thresholds are <3.0 mg/L) but increases the duration of nightly chronic conditions (<6.0 mg/L) due to the inverse relationship between dissolved oxygen saturation concentration and stream temperature. Second, dissolved oxygen concentrations are affected by upstream environmental conditions. High water quality upstream improves degraded downstream water quality conditions, but the reverse is also true wherein poor upstream water quality degrades water quality downstream.

ISBN: 9781339968179Subjects--Topical Terms:

794747
Water resources management.

Effects of environmental water rights purchases on dissolved oxygen, stream temperature, and fish habitat.
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500 $a Source: Masters Abstracts International, Volume: 55-06.
500 $a Adviser: Sarah E. Null.
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520 $a Human impacts from land and water development have degraded water quality and altered the physical, chemical, and biological integrity of Nevada's Walker River. Reduced instream flows and increased nutrient concentrations affect native fish populations through warm daily stream temperatures and low nightly dissolved oxygen concentrations. Environmental water purchases are being considered to maintain instream flows, improve water quality, and enhance habitat for native fish species, such as Lahontan cutthroat trout. This study uses the River Modeling System (RMSv4), an hourly, physically-based hydrodynamic and water quality model, to estimate streamflows, temperatures, and dissolved oxygen concentrations in the Walker River. Stream temperature and dissolved oxygen changes were simulated from potential environmental water purchases to prioritize the time periods and locations that water purchases most enhance stream temperatures and dissolved oxygen concentrations for aquatic habitat. Environmental water purchases ranged from 0.03 cms to 1.41 cms average daily increases. Modeling results indicate that increased water purchases generally affect dissolved oxygen in two ways. First, environmental water purchases increase the thermal mass of the river, cooling daily stream temperatures and warming nightly temperatures. This prevents conditions that cause the lowest nightly dissolved oxygen concentrations (moderate production impairment thresholds are <5.0 mg/L and acute mortality thresholds are <3.0 mg/L) but increases the duration of nightly chronic conditions (<6.0 mg/L) due to the inverse relationship between dissolved oxygen saturation concentration and stream temperature. Second, dissolved oxygen concentrations are affected by upstream environmental conditions. High water quality upstream improves degraded downstream water quality conditions, but the reverse is also true wherein poor upstream water quality degrades water quality downstream.
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