Using Large Organic Debris to Restore Fish Habitat in Debris-torrented Streams PDF Download
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Author: D. B. Tripp
Publisher: BC, Ministry of Forests and Lands
ISBN:
Category : Nature
Languages : en
Pages : 42
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Book Description
Author: D. B. Tripp
Publisher: BC, Ministry of Forests and Lands
ISBN:
Category : Nature
Languages : en
Pages : 42
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Book Description
Author: Thomas S. Rayner
Publisher:
ISBN:
Category :
Languages : en
Pages : 81
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Author:
Publisher:
ISBN:
Category : Aquatic habitats
Languages : en
Pages : 58
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Book Description
Author: V. A. Poulin
Publisher: BC, Ministry of Forests
ISBN:
Category : Science
Languages : en
Pages : 32
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Book Description
Research in the Fish/Forestry Interaction Program was initiated in 1981 to resolve the conflicts between steep slope logging and the integrated management of fish and forest resources on the Queen Charlotte Islands. ?Field research provided a data base for evaluating alternative research strategies, developing a stratification methodology for extrapolation of study results, and determining the site descriptors required to assess impacts. This report describes the research approach and methodology adopted in this major interdisciplinary program.
Author: R. C. Wissmar
Publisher:
ISBN:
Category : Nature
Languages : en
Pages : 294
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Book Description
Fisheries and natural resource managers and policymakers need more efficient procedures for identifying sources of variability in ecosystems (natural and managed) and assessing uncertainties of managing and making decisions for developing and implementing river restoration strategies. This book seeks to integrate perspectives on variability of physical and biological functions and concepts of uncertainty in natural and managed systems, into strategies for renewing and conserving river ecosystems. The book explores approaches to understanding and communicating the processes contributing to the variability of different types of river systems, and to assessing major sources of uncertainty in natural and managed river ecosystems.
Author: Kathleen P. Minor
Publisher:
ISBN:
Category : Forest ecology
Languages : en
Pages : 68
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Book Description
Large woody debris recruitment to streams from adjacent riparian forests influences stream channel morphology, sediment routing, and fish habitat. A mathematical model was developed to 1) determine whether the trees in a stand adjacent to a stream, upon falling, would provide large woody debris of a specified size to the stream and 2) determine the volume of trees, upon falling, that reach a stream over a specific time period. The model considered stand and topographic parameters such as tree size, tree form, distance from the stream, hill slope gradient, stream gradient, stream width, riparian buffer width, and basal area of the stand. The likelihood that a tree of a specified size will reach the channel is the probability the tree will fall in a given direction evaluated at 1 degree azimuths from 0 to 360 degrees multiplied by the probability it is tall enough to reach the stream. Volume estimates were calculated by multiplying estimated tree volumes by the joint probabilities. A test riparian polygon comprised of Douglas-fir (Pseudotsuga menziesii {Mirb.] Franco) was selected to illustrate how the model predicts large woody debris recruitment of both key pieces and volume to an adjacent stream. Estimating large woody debris recruitment to streams from adjacent riparian stands over several decades may be useful in determining effectiveness of various configurations of riparian buffers and provide assistance in the prediction of the future quality of aquatic and terrestrial habitats in riparian zones. This model provides one way to estimate where large wood is coming from within a riparian leave area and could be useful in determining necessary widths for riparian areas that are intended to provide large woody debris recruitment over time.
Author: Reid Camp
Publisher:
ISBN:
Category :
Languages : en
Pages :
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Book Description
In response to human impacts, river restoration and rehabilitation actions have become a priority in the United States. In the Pacific Northwest, most restoration actions are focused on repairing degraded freshwater habitat to increase or improve Pacific salmonid production. However, traditional river restoration actions remained largely unchanged for over 100 years despite a lack of definitive evidence that the actions were effective. More recently, there has been a surge in process-based restoration actions, which aim to reestablish the physical and biological processes that maintain fluvial and floodplain environments by targeting the root causes of degradation in a watershed. Cheap and cheerful restoration projects focus on restoration actions that are low impact and cost effective, can be implemented over large scales, and target degraded processes. However, because cheap and cheerful restoration is a relatively new method, the success of these types of projects has not been assessed. To address this issue, I studied the short-term physical effectiveness of a type of cheap and cheerful restoration that uses high density large woody debris (HDLWD) to restore instream habitat complexity in two wadeable tributaries to Asotin Creek in southeast Washington State. My specific research objectives included (1) assessing hydraulic and geomorphic responses in the stream channel imposed by restoration structures, (2) quantifying the changes to geomorphic channel unit assemblages post restoration, (3) quantifying changes in sediment storage post restoration, and (4) developing a geomorphic condition assessment of Asotin Creek using the River Styles Framework. Additionally, I developed a mobile database application (app) to facilitate data collection using a novel rapid restoration effectiveness assessment survey. Through analysis and a thorough review of the land use history in Asotin Creek, I determined that much of the watershed is in poor geomorphic condition based on the River Styles Framework for river classification. Many stream reaches have been degraded from their historic condition and often lack habitat complexity associated with suitable rearing habitat for juvenile salmonids. My results indicate that the structures are impose several immediate hydraulic responses following installation. These hydraulic responses increase hydraulic roughness, which results in predictable geomorphic responses following high flow events. Following restoration, the number and area of pools and bars significantly increased within treatment sites, while the number and area of planar units decreased. Likewise, it appears that the addition of the structures has led to a 25% increase in depositional volume at treatment sites compared to control sites. Results from the rapid assessment approach supported the more vetted approaches used to assess the efficacy of the treatment. However, the viability of the app and rapid protocol indicate that inter-observer variability may be high, and estimates of geomorphic unit area are not entirely consistent with the vetted approaches. Analysis of the rapid assessment approach revealed pertinent improvements to the app and rapid protocol that will be made in the future.
Author:
Publisher:
ISBN:
Category : Fisheries
Languages : en
Pages : 556
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Author:
Publisher:
ISBN:
Category : Biotic communities
Languages : en
Pages : 598
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Book Description
Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 432
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Book Description
