Author: G. A. McKinnonPublisher:
ISBN:
Category : Culverts
Languages : en
Pages : 121
Book Description
Fish Passage Assessment of Culverts Constructed to Simulate Stream Conditions on Laird River Tributaries
Author: G. A. McKinnonPublisher:
ISBN:
Category : Culverts
Languages : en
Pages : 121
Book Description
Fish Passage Assessment of Culverts Constructed to Simulate Stream Conditions on Liard River Tributaries
Author: Canada. Department of Fisheries and OceansPublisher:
ISBN:
Category :
Languages : en
Pages : 121
Book Description
Fish Passage Assessment of Culverts Constructed to Simulate Stream Conditions on Liard River Tributaries
Author: G. A. McKinnonPublisher:
ISBN:
Category : Culverts
Languages : en
Pages : 121
Book Description
Fish Passage Through Highway Culverts : a Field Evaluation
Author: Thomas J. McClellanPublisher:
ISBN:
Category : Culverts
Languages : en
Pages : 326
Book Description
Fish Passage Through Culverts
Author: Calvin O. BakerPublisher:
ISBN:
Category : Culverts
Languages : en
Pages : 84
Book Description
The success of fish migration through culverts is dependent on the swimming ability of the fish and the hydraulic conditions of the culvert. Properly designed and constructed culverts can minimize the impact on fish passage. Because culverts are typically more economical than bridges, it is appropriate to evaluate when to use culverts and to predict the effects of such culvert installations. During the consideration of alternatives for structures for fish passage, culverts should not be automatically eliminated. This publication has tried to examine the aspects of culvert design and operation relative to the existing information that has been published in previous studies. Ideally, a culvert installation should not change the conditions that existed prior to that installation. This means that the cross-sectional area should not be restricted by the culvert, the slope should not change, and the roughness coefficients should remain the same. Any change in these conditions will result in a velocity change which could alter the sediment transportation capacity of the stream. A truly successful culvert design would include matching the velocities of the fish's swimming zone in the culvert to the swimming capacity of the design fish. Unfortunately, not enough research has been completed to make this an acceptable criterion of culvert design. This approach is preferred because it is easier to reduce the velocities in the swimming zone by increasing the boundary roughness than it is to reduce the mean velocity of the entire culvert. This publication contains some relatively simple guidelines which can reduce the installation problems of culverts in streams containing migrating fish when combined with the expertise of an experience fish biologist, engineer, and hydrologist.
Design for Fish Passage at Roadway-stream Crossings
Author: Rollin H. HotchkissPublisher:
ISBN:
Category : Culverts
Languages : en
Pages :
Book Description
Cataloging and synthesizing existing methods for the design of roadway-stream crossings for fish passage began in January 2005 with an extensive literature review covering the topics of culvert design and assessment to facilitate fish passage. A survey was posted online to gather input from design professionals across the country, and a Culvert Summit Meeting was held in Denver Colorado from February 15-16, 2006, to allow presentation and discussion of state-of-practice design and assessment techniques. Following the Summit meeting, a Technical Advisory Committee was developed with individuals specifically knowledgeable in the topics of interest. Members were crucial in shaping and reviewing the direction of these guidelines. This document places current culvert design techniques into four categories based on design premise and objectives. These categories include: No Impedance techniques, which span the entire stream channel and floodplain; Geomorphic Simulation techniques, which create fish passage by matching natural channel conditions within the culvert crossing; Hydraulic Simulation techniques, which attempt to closely resemble hydraulic diversity found in the natural channels through the use of natural and oversized substrate; and Hydraulic Design techniques, which may utilize roughness elements such as baffles and weirs to meet species specific fish passage criteria during periods of fish movement. Preliminary chapters covering the topics of fish biology and capabilities, culverts as barriers, fish passage hydrology, and design considerations aid in the selection of appropriate design techniques based on hydraulic, biologic, and geomorphic considerations. A further section presents examples of design techniques fitting the defined design categories. Design examples and case histories for a selection of design techniques are presented next, and are followed by a discussion on construction, maintenance, monitoring, and future research needs.
Inventory and Assessment of Fish Passage Conditions in Culverts Within the Municipality of Anchorage
Author: Steven W. AlbertPublisher:
ISBN:
Category : Culverts
Languages : en
Pages : 69
Book Description
Providing for adequate fish passage at road crossings using culverts is an important component of both the management of fisheries and state roadways. This study was initiated by the Alaska Department of Fish and Game and U.S. Fish & Wildlife Service to determine the status of fish passage conditions through culverts located within the Municipality of Anchorage. An evaluation of 241 stream crossing sites with 295 culverts along state highways and secondary roads was conducted between June 22 and July 21, 2004. Specific evaluation criteria were applied to each site to assess fish passage status. The three primary criteria included culvert slope, a measurement describing the degree of channel constriction at the culvert, and culvert outfall height. Crossings were then classified as RED (conditions assumed inadequate for fish passage), GRAY (additional data collection and analysis needed), or GREEN (assumed adequate for fish passage).
Assessment of Road Culverts for Fish Passage Problems on State- and County-owned Roads
Author: Albert H. MiratiPublisher:
ISBN:
Category : Culverts
Languages : en
Pages : 214
Book Description
Fish Passage in Large Culverts with Low Flows
Author: U.s. Department of TransportationPublisher: CreateSpace
ISBN: 9781508810889
Category : Technology & Engineering
Languages : en
Pages : 140
Book Description
Historically, culverts have been designed for hydraulic efficiency without consideration of fish passage or, more generally, aquatic organism passage. Over time, it has become apparent that culverts frequently become impediments to healthy aquatic ecosystems because they can prevent the movement of fish and other aquatic organisms upstream and downstream through the culvert. Therefore, aquatic organism passage through culverts has become an important design element component for road/stream crossings. Common physical characteristics that may create barriers include high water velocity, shallow water depth, large outlet drop heights, turbulence within the culvert, and accumulation of debris. Sediment deposition and erosion at the culvert may also create a barrier to passage. Culvert length, slope, and roughness may create conditions that impede passage as well. Further complicating design is that passage needs differ by species, life stage, and season. To address this complex task, the Federal Highway Administration (FHWA) developed a stream simulation approach for designing culverts. Stream simulation is based on the concept that if conditions inside a culvert are similar to those conditions in the stream upstream and downstream of the culvert, then aquatic organism passage will be provided without consideration of the specific physical requirements of one or more species. However, stream simulation is not appropriate for all situations. For example, an existing culvert that is blocking passage may not be a good candidate for replacement using stream simulation because of the size of the embankment or insufficient budget for a replacement. Applications of stream simulation may also be limited for new culvert installations. Site constraints or budget limits could dictate a smaller culvert installation than would be recommended by stream simulation. In these cases, it may be desirable to design a culvert crossing considering the specific passage needs of a specific species of fish. Doing so requires an understanding of the migration seasonality, life stage swimming capabilities, and stream flow rates expected during passage. Ideally, this information is developed by a multidisciplinary team of aquatic biologists, hydrologists, and engineers. From this information, the maximum velocity and minimum depth requirements for the target fish are derived. Considering only average velocity in a culvert masks that there are zones within the flow field where velocities both higher and lower than the average exist. The objective of this research is to assist in the design of culverts for fish passage by 1) identifying zones of lower velocity that are conducive to fish passage and 2) developing practical design methods quantifying these lower velocity zones.
Advanced Studies of Fish Passage Through Culverts
Author: Matthew David BlankPublisher:
ISBN:
Category : Culverts
Languages : en
Pages : 428
Book Description
Fish passage through culverts is an important component of road and stream crossing design. Although no comprehensive inventory of the number of culverts on fishbearing streams in the United States is available, there is an estimated 1.4 million streamroad crossings. The most common physical characteristics that create barriers to fish passage include excessive water velocity, insufficient water depth and large outlet drop heights. Over the past decade, interest in the effect culvert barriers have on aquatic systems has grown; accordingly, various passage assessment techniques have been used to determine whether a structure is a barrier and to what degree (its "barrierity"). Recent research has shown that determining the barrierity of a culvert is not trivial, and that different methods are often not congruent in their classification of "barrierity". The purpose of this research was to investigate the effect of velocity on fish passage in great detail by: testing the use of computational fluid dynamics (CFD) for estimating the 3-D velocity field through a culvert; quantifying velocity diversity through culverts for a range of flows; characterizing the energy expenditure paths through a culvert and identifying the passageways Yellowstone cutthroat trout used to successfully negotiate passage; and developing and testing a new barrier assessment method. The research was done, in part, by studying fish passage through culverts in Mulherin Creek, an important spawning tributary for Yellowstone cutthrout trout migrating from the Yellowstone River. Comparisons between predicted and observed velocities show 86% and 82% of variation in the observed velocity data were explained by the CFD model, for flow rates of 1.44 m3/s and 0.87 m3/s, respectively. The diverse velocity field through the culvert barrel created a range of energy expenditure paths through the entire culvert length. Fish movement observations showed successful passage only for trout seeking and using the minimum energy path created, in part, by the skew between the upstream channel and the culvert. This research investigated a new hydraulic approach to assessing barriers that uses the 3-D velocity field. Comparisons between estimated passage and measured passage show the 3-D method most accurately indicated passability compared to a 1-D method.