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Dissertations / Theses on the topic 'Instream habitat'

Author: Grafiati

Published: 4 June 2021

Last updated: 1 February 2022

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1

Maddock, Ian Philip. "Instream habitat assessment : a geomorphological approach." Thesis, Loughborough University, 1994. https://dspace.lboro.ac.uk/2134/32916.

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Instream habitat assessment methods are required to evaluate the biological quality of streams in relation to flow and channel morphology and to distinguish the effects of river management on the instream biota. A range of techniques are described and developed in this study ranging from a simple reconnaissance survey to the detailed Physical Habitat Simulation Model (PHABSIM) in order to establish a method for the classification of river channels, identification of key parameters that determine the biota and assessment of the influence of flow and bed morphology on habitat availability.

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2

Krause, Colin William. "Evaluation and Use of Stream Temperature Prediction Models for Instream Flow and Fish Habitat Management." Thesis, Virginia Tech, 2002. http://hdl.handle.net/10919/31229.

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The SNTEMP (U.S. Fish and Wildlife Service), QUAL2E (U.S. Environmental Protection Agency), and RQUAL (Tennessee Valley Authority) stream temperature prediction models were evaluated. All models had high predictive ability with the majority of predictions, >80% for Back Creek (Roanoke County, VA) and >90% for the Smith River tailwater (SRT) (Patrick County, VA), within 3Â°C of the measured water temperature. Sensitivity of model input parameters was found to differ between model, stream system, and season. The most sensitive of assessed parameters, dependent on model and stream, were latera

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3

Worrall, Thomas P. "The influence of hydromorphology on instream ecology in lowland rivers." Thesis, Loughborough University, 2012. https://dspace.lboro.ac.uk/2134/10141.

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With the formal adoption of the Water Framework Directive in 2000, into European legislation it committed all member states to ensure that all inland waterbodies should reach good ecological status by 2015. As a result examination of the influence of hydromorphology on the ecological health of riverine ecosystems has become an increasingly important priority for statutory monitoring agencies such as the Environment Agency of England and Wales and equivalents in other parts of the UK. It is anticipated that by increasing our understanding of the role that hydromorphological processes play in sh

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4

Stout, Jacob B. "Trout Habitat in an Altered Gravel-Bed River with an Augmented Flow Regime." DigitalCommons@USU, 2019. https://digitalcommons.usu.edu/etd/7589.

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The Diamond Fork River, and it’s tributary Sixth Water Creek, has been highly altered in terms of shape, function, and ecologicaly due to large, trans-basin flows additions to the system for irrigation starting in the early 1900s. Flows were exceptionally large for 80 years, after which they were reduced in 2004. Larger than natural flows during the low flow season were then added to the river in an effort to improve ecosystem health and recreational fishing opportunities. Since the prescription additional flow during low flow seasons, the river channel has undergone further change, most notic

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5

Rowe, David Charles. "Relationships of fish assemblages, instream physical habitat, and landscape characteristics of wadeable Iowa streams." [Ames, Iowa : Iowa State University], 2007.

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6

Vadas, Robert L. "Habitat tools for assessing instream-flow needs for fishes in the upper Roanoke River, Virginia." Diss., This resource online, 1994. http://scholar.lib.vt.edu/theses/available/etd-07102007-142521/.

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7

Persinger, Jason William. "Developing Habitat Suitability Criteria for Individual Species and Habitat Guilds in the Shenandoah River Basin." Thesis, Virginia Tech, 2003. http://hdl.handle.net/10919/31646.

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The diversity of fish species found in warmwater stream systems provides a perplexing challenge when selecting species for Instream Flow Incremental Methodology (IFIM) studies. An often-suggested approach has been to use habitat guilds to incorporate the diversity found in these systems. My goal is to determine the feasibility of developing habitat suitability criteria (HSC) for the entire fish assemblage in the North and South Fork Shenandoah River, Virginia, using habitat guilds. I examined the strengths and weaknesses of direct underwater observation via snorkeling and throwable anode el

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8

Triggol, Anna. "Testing and developing protocols for the practical application of PHABSIM for instream flow and habitat assessment." Thesis, Coventry University, 2001. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.342145.

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9

Hoffman, Kinsey H. "Ecohydrologic Indicators of Low-flow Habitat Availability in Eleven Virginia Rivers." Thesis, Virginia Tech, 2015. http://hdl.handle.net/10919/56978.

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Increasing demand and competition for freshwater is threatening instream uses including ecosystem services and aquatic habitat. A standard method of evaluating impacts of alternative water management scenarios on instream habitat is Instream Flow Incremental Methodology (IFIM). The primary outputs of IFIM studies are: 1) habitat rating curves that relate habitat availability to streamflow for every species, lifestage, or recreational use modelled; and 2) habitat time series under alternative water management scenarios. We compiled 428 habitat rating curves from previous IFIM studies across 11

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10

Arnold, Winfred R. 1960. "Effects of Water Quality, Instream Toxicity, and Habitat Variability on Fish Assemblages in the Trinity River, Texas." Thesis, University of North Texas, 1989. https://digital.library.unt.edu/ark:/67531/metadc332226/.

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The Trinity River flows through the Dallas-Ft. Worth Metroplex in north central Texas where it receives effluents from numerous point sources including seven large regional wastewater treatment facilities. Historically, the Trinity River has been impacted by massive wastewater loadings which often constitute > 80% of the total river discharge during low flow periods. Normally, high mass loadings correspond to the summer months, compounding the effects of a naturally stressful period, characterized by high temperatures and low dissolved oxygen concentrations. Samples from 12 stations were col

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11

Howard, Amanda Kelly. "Influence of instream physical habitat and water quality on the survival and occurrence of the endangered Cape Fear shiner." Connect to this title online, 2003. http://www.lib.ncsu.edu/theses/available/etd-04152003-213732/.

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12

Hasselquist, Eliza Maher. "Gradients of time and complexity : understanding how riparian and instream ecosystems recover after stream restoration." Doctoral thesis, Umeå universitet, Institutionen för ekologi, miljö och geovetenskap, 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-108079.

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Why evaluations of the ecological outcomes of stream and river restoration have largely reported inconclusive or negative results has been the subject of much debate over the last decade or more. Understanding the reasons behind the lack of positive results is important for bettering future restoration efforts and setting realistic expectations for restoration outcomes. This thesis explores possible explanations for why researchers have failed to ﬁnd clear and predictable biotic responses to stream restoration: recovery time has been too short, that restoration of habitat complexity is not cle

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13

Pollard, S. (Sharon). "Defining flows to protect instream biota : a critique of the instream flow incremental methodology and the development of a hierarchical habitat-based approach, using the pennant-tailed catlet, Chiloglanis anoterus in the Marite River, South Africa." Doctoral thesis, University of Cape Town, 2001. http://hdl.handle.net/11427/6160.

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Bibliography: leaves 249-279.<br>This thesis focusses on two approaches to determining Instream Flow Requirements (IFR) for regulated rivers, specifically in the sub-tropical eastern region of South Afiica using a flow-sensitive fish species, the pennant-tailed catlett 07iloglanis anoterus. In response to the diminishing and altered flow regimes of rivers, and the ecological consequences, a range of methodologies has evolved that attempt to quantify IFRs for rivers. One group of methods that attempts to do this are known as habitat-assessment approaches. They focus specifically on understandin

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14

Chan, Matthew D. "Fish ecomorphology predicting habitat preferences of stream fishes from their body shape /." Diss., Connect to this title online, 2001. http://scholar.lib.vt.edu/theses/available/etd-05242001-183326.

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15

Eitzmann, Jeffrey Laine. "Spatial habitat variation in a Great Plains river : effects on the fish assemblage and food web structure." Thesis, Manhattan, Kan. : Kansas State University, 2008. http://hdl.handle.net/2097/557.

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16

Roghair, Craig N. "Recovery from and effects of a catastrophic flood and debris flow on the brook trout (Salvelinus fontinalis) population and instream habitat of the Staunton River, Shenandoah National Park, Virginia." Connect to this title online, 2000. http://scholar.lib.vt.edu/theses/available/etd-08012000-15360010/.

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17

Ramey, Robert Clayton. "Habitat Suitability Criteria for Fishes of the South Fork of the Shenandoah River and an Investigation into Observer Effects Associated with Two Techniques of Direct Underwater Observation." VCU Scholars Compass, 2009. http://scholarscompass.vcu.edu/etd/1806.

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This study constructed habitat suitability criteria for fishes of the South Fork of the Shenandoah River, in Virginia. The criteria will be used in an IFIM study to produce estimates of the discharge required by fishes in the South Fork. Chi-square tests were used to evaluate whether criteria described habitat use to a statistically significant degree. Secondly, chi-square tests were used to test transferability. The criteria described the habitat use of seven taxa commonly found in the South Fork to a statistically significant degree. Habitat criteria for two taxa did not describe their

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18

Roghair, Craig N. "Recovery From and Effects of a Catastrophic Flood and Debris Flow on the Brook Trout (Salvelinus fontinalis) Population and Instream Habitat of the Staunton River, Shenandoah National Park, VA." Thesis, Virginia Tech, 2000. http://hdl.handle.net/10919/34286.

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The Staunton River is a high gradient, second order stream approximately 6 km in length located on the eastern slope of the Blue Ridge Mountains in Shenandoah National Park, VA. In June 1995, a catastrophic flood and debris flow altered the instream habitat and <i>Salvelinus fontinalis</i> population of the Staunton River. The debris flow scoured the streambed, deposited new substrate materials, removed trees from the riparian zone, and eliminated fish from a 1.9km section of the stream. By June 1998, both young-of-year (YOY) and age 1+ <i>S. fontinalis</i> had recolonized the debris flow af

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19

Holm, Christian Franz. "Spatial habitat use of young-of-the-year Atlantic salmon (Salmo salar) in response to changing stream discharge and population density : testing the instream flow model concept in a controlled experiment." Thesis, University of Stirling, 2001. http://hdl.handle.net/1893/26677.

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Many rivers are affected by man-induced regulations of stream-flow. The effects of these on the instream biota have been studied widely and it is generally accepted that assessment tools for the management of regulated rivers are of vital importance. In particular predictive instream habitat models like the Physical Habitat Simulation Model (PHABSIM) have become popular for this purpose with users world-wide. These models predict discharge-related changes in instream habitat availability for target species by modelling the hydraulic geometry of the river reach on the one and the microhabitat p

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20

Walden, Diana L. "Applying Biological and Physical Templates to Perform Instream Habitat Mapping in the Northeast." 2008. https://scholarworks.umass.edu/theses/258.

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Most northeastern river basins are stressed by the effects of development but the complexity of evaluating rivers often hinders the establishment of effective management regulations. Many methodologies have been proposed for assessing instream habitat, determining critical flow levels, and evaluating biological communities, but no one approach is universal. The overall objective of this thesis is to move towards standardizing components of river modeling. Rather than examine a full model, I investigated individual steps of MesoHABSIM, an instream habitat modeling approach. The two components

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21

Huan-HsuanChang and 張桓旋. "Using Fish Autecology Matrix &; Artificial Neural Networks to Simulate Instream Fish Habitat Conditions." Thesis, 2014. http://ndltd.ncl.edu.tw/handle/04496855971947653433.

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碩士<br>國立成功大學<br>水利及海洋工程學系<br>102<br>Recently, more and more people realize the importance of Ecology. For river restoration, ecological engineering projects that providing more suitable habitats for fish community are being designed. To sustain fish population and maintain biodiversity, understanding the relationship between fish community and physical habitat of rivers plays an important role. This study proposes a simplified method to estimate the mesohabitat composition that would favor members of a given set of fish species. Sampling data were collected form HouKu River and WuGouShui River

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22

Miller, Alan Christopher. "Response of juvenile steelhead trout to an instream habitat rehabilitation project in Meadow Creek, Oregon." Thesis, 1997. http://hdl.handle.net/1957/34315.

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Responses of juvenile steelhead trout to changes in stream habitat resulting from an instream habitat rehabilitation project in Meadow Creek, Oregon were measured from 1991 through 1992 and compared to pre-treatment data from 1987 through 1990. Sixty nine pool-forming, and 59 channel-stabilizing log structures were constructed by the U.S. Forest Service in a 3.7 km reach in 1990. A 20-year flood caused extensive modifications to the instream structures in May 1991. Pool habitat and large wood volume increased in the treatment and the two reference reaches but pool development was greater in th

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23

Vogt, Allison. "Responses of instream habitat and fishes to modest changes in forest cover in Southeastern streams." 2004. http://purl.galileo.usg.edu/uga%5Fetd/vogt%5Fallison%5Fe%5F200412%5Fms.

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24

Xie, Jing-Wei, and 謝暻椲. "A study on estimation of the ecological instream flow and improvement of habitat for midstream on Dahan river." Thesis, 2002. http://ndltd.ncl.edu.tw/handle/11514779650208354185.

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碩士<br>國立中央大學<br>土木工程研究所<br>90<br>This paper combines hydraulic model HEC-RAS 3.0 and habitat model RHABSIM 2.2 to calculate the ecological instream flow of the habitat by using Acrossocheilus paradoxus as target species in the midstream of Dahan river. Different influence from a high-weir or a series of low-weirs in research area was analyzed. The change of habitat and the economical benefit of weirs were also discussed. Analysis of RHABSIM model to habitat in the condition of low flow was performed. To achieve ecological requirement, the instream flow is estimated to be 16 cms. However, 3cms

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25

England, Laura Erin. "Riparian forest cover at multiple scales influences on instream habitat, aquatic assemblages, and food webs in headwater streams /." 2003. http://purl.galileo.usg.edu/uga%5Fetd/england%5Flaura%5Fe%5F200308%5Fms.

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26

Lacey, Ralph William Jay. "The hydrodynamics associated with instream large roughness elements in gravel-bed rivers = L'hydrodynamique associée aux éléments de rugosité dans les rivières à lit de graviers." Thèse, 2007. http://hdl.handle.net/1866/18281.

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27

Beaton, Andrew. "Testing and Refining a Unique Approach for Setting Environmental Flow and Water Level Targets for a Southern Ontario Subwatershed." Thesis, 2012. http://hdl.handle.net/10214/3850.

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In this study Bradford’s (2008) approach for setting ecological flow and water level targets is tested and refined through application within the Lake Simcoe Region Conservation Authority’s (LSRCA) subwatershed of Lover’s Creek. A method for defining subwatershed objectives and identifying habitat specialists through expert input is proposed and tested. The natural regime of each streamflow and wetland site is characterized along with the hydrological alteration at each site. Potential ecological responses to the hydrologic alterations are then hypothesized for the different types of change

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