modifying 3 stream gradients to upstream migration swim-thru fishways / spawning banks

sources:

Migration of freshwater fishes -
books.google.com/books?isbn=0632057548...
Martyn C. Lucas, Etienne Baras - 2001 - Nature - 420 pages
Upstream spawning migration to gravel riffle areas has also been reported for the greater redhorse ... This area includes the longest low gradient (0. ...

[PDF] Migration Patterns and Spawning Site Selection by Virginia Lake ...
alaska.fws.gov/asm/pdf/fisheries/reports/01-179finaliii.pdf
PDF/Adobe Acrobat - Quick View
T Cady - 2004 -
spawning. Moving progressively upstream from the lake, these include: 1) a low- gradient 0.8 kilometer floodplain reach; 2) a moderate gradient bedrock and ...

[PDF] k o n Valdez Oil Spill StateRederal Natural Resource Damage ...
www.arlis.org/docs/vol1/42725188.pdf
PDF/Adobe Acrobat
Injury to Spawning Areas and an Evaluation of Spawning Escapement ...... stream size, gradient, water clarity, forest canopy, and extent of upstream spawning to ...

[PDF] Frykman Gulch Fish Passage Improvement Project
www.hrcllc.com/pdf/MRC-Frykman-Gulch-Restoration_Project.pd...
PDF/Adobe Acrobat - Quick View
and replace it with a bridge, returning the stream to a gradient that would allow both species of salmonids access to upstream spawning habitat. Culvert outlet ...

[PDF] Mid Klamath Tributary Creek Mouth Assessment
www.mkwc.org/programs/fisheries/bella_vista_creek_photos.pd...
PDF/Adobe Acrobat - Quick View
low gradient spawning and rearing habitat exist upstream of the barrier. Interviews with tribal elders indicate that Chinook, Coho, and steelhead all used Rock ...

Fish Resources
www.fs.fed.us/r6/fishing/regional/fishresources/salmon.html
Known for their indomitable urge to swim upstream to spawn, these fish are truly a ... In streams with steep gradient and large substrate, they spawn between ...

[PDF] Inlluence of Stream Gradient on Standing Stock of Brook Trout in the ...
https://research.wsulibs.wsu.edu:8443/.../bitstream/.../ ...-
PDF/Adobe Acrobat - Quick View
IM Chisholm - 1986 -
Stream gradient is believed to have a negative influence on .... Influence of phlsical factors on densilr of stocked brown trout in a Danish lowland stream. Fish . ...

Two Simple Models for Estimating Daily Mean Water Temperatures ...
www.jstor.org/stable/3566020
E Jeppesen - 1987 -
OIKOS 49: 149-155. Copenhagen 1987. Two simple models for estimating daily mean water temperatures and diel variations in a Danish low gradient stream ...

Swim-Thru Fishway
www.swimthrufishway.com/
Swim-Thru Fishway: A simple, natural way for fish to migrate upstream by. swimming past dams, culverts, waterfalls and other obstructions. ...

Fishways
www.peconicestuary.org/Fishways.html
In cases where removal is not feasible due to concerns about water level, historical value of the dam, etc., fishways are the next best alternative. Fishways come ...

Royal Botanical Gardens - The Fishway
www.rbg.ca/Page.aspx?pid=331
The Fishway. Download the Fishway and Coastal Marshes Natural Fish Hatcheries fact sheets. Located at the mouth of the Desjardins Canal—the only channel ...

[PDF] What is a fishway?
www2.mdbc.gov.au/__data/page/65/A4Fishway.pdf
PDF/Adobe Acrobat - Quick View
What is a fishway? Fishways come in many forms, and are specifically designed for each location. The common theme is to permit the movement of ...

Fishways Passage - Major Problems & Solutions
www.vicfishways.com.au/fis_res_page.htmlCached -
The following section outlines the major technical constraints to efficient and effective operation of fishways. Major problems are canvassed, and their causes ...

Fishing 101: Crappie
www.explorekentuckylake.com › ... › Fishing 101
Typically during the day these spawners can be taken around the nearest cover to the spawning banks using the same methods but fishing somewhat deeper. ...

Spawning Bass on Table Rock Lake
www.bassfishingmidwest.com/Table_Rock_Lake_Bass_Spawning_S....
Chunk rock and gravel banks provide a forage base of crawfish for bass, while pea-gravel banks are the preferred spawning sites. When searching for wood ...


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Note added at 7 hrs (2011-09-11 15:04:54 GMT)
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Explanation:

In Denmark, due to its hilly lowland geography, streams tend to be slow-meandering, sometimes even quite sluggish. Nothing like fast-flowing Alpine or US West Coast / Alaskan streams with little or larger waterfalls.

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Note added at 10 hrs (2011-09-11 17:50:19 GMT)
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@Phil Curry:

Based on your above discussion entry, ***stryg*** would translate as ***riffle-pool sequence / pool-riffle sequence*** into English:

sources:

[PDF] Physical habitat structure in lowland streams and effects of ...
www2.dmu.dk/1_viden/2_publikationer/3_Ovrige/.../PhD_MLP.pdf
PDF/Adobe Acrobat
ML Pedersen -
loss of riffle-pool sequences in channelized streams ...... sparkeprøver udtages i et stryg). Samtidig registreres eventuel lugt eller farvning af vandet. ...

[PDF] Fysiske og biologiske effekter af sandfang i mindre danske vandløb -
www.gsff.dk/pdf/effekter_af_sandfang.pdf
PDF/Adobe Acrobat - View as HTML
KV Just - 2007
pool eller lignende. Da det var forventet, at effektiviteten af PIT-læseren ..... salmonid brook: An approach to the functional role of the riffle-pool sequence. ...... etableringen af stryg og høller samt sikring af brinker med sten, ...

Samlet html – Bekæmpelsesmiddelforskning fra Miljøstyrelsen Nr ... -
www2.mst.dk/udgiv/publikationer/2009/978-87.../helepubl.htm
Disse kunstige vandløb var 12 m lange, 0,6 m brede og forsynet med stryg- og .... fed with 4-5 litres s-¹, and equipped with riffle and pool sequences containing ...

[PDF] Fysiske og biologiske effekter af sandfang i mindre danske vandløb
www.fiskepleje.dk/upload/dfu/fiskepleje.dk/.../sandfangspec...
PDF/Adobe Acrobat
KV Just - 2007
pool eller lignende. Da det var forventet, at effektiviteten af ..... salmonid brook: An approach to the functional role of the riffle-pool sequence. ...... med 3 i ”glide”, 2 i stryg og 1 i høl. Transekterne forblev de samme gennem ...

[PDF] Proceedings fra seminar om restaurering og vedligeholdelse af ... -
www.statensnet.dk/pligtarkiv/fremvis.pl?vaerkid=5058&reprid...
PDF/Adobe Acrobat - Quick View
13. okt 1999 – den blev det omløbsstryg, og nu er stryg ...... fle/pool sequences, meanders and ... downstream of the riffle. This aspect will ...

Riffle-pool sequence - Wikipedia, the free encyclopedia
en.wikipedia.org/wiki/Riffle-pool_sequence
In a flowing stream, a riffle-pool sequence (also known as a pool-riffle sequence) develops as a stream's hydrological flow structure alternates from areas of ...

Riffle-pool sequence - Encyclopedia
www.encyclo.co.uk/define/Riffle-pool sequence
In a flowing stream a `riffle-pool sequence` develops as an area of alternating areas of relatively shallow and deeper water. Riffles describe shallow water where ...

Channel Geometry in the Riffle-Pool Sequence
www.jstor.org/stable/520962
KS Richards - 1978 -
pool. Field observations of variations of channel geometry in riffle-pool sequences on the River Fowey, Cornwall, England indicate that equilibrium channels can ...

Channel width and the riffle-pool sequence -- RICHARDS 87 (6 ...
bulletin.geoscienceworld.org/cgi/content/abstract/87/6/883
KS RICHARDS - 1976 -
Channel width and the riffle-pool sequence. K. S. RICHARDS1. 1 Lanchester Polytechnic, Priory Street, Coventry CV1 5FB, England. Investigations of channel ...

Flow reversal over a natural pool-riffle sequence: a computation ...
eprints.soton.ac.uk › Research › EPrints
Z Cao - 2003 -
2 Jul 2010 – A computational study is presented on the hydraulics of a natural pool-riffle sequence composed of mixed cobbles, pebbles and sand in the ...

some more related references:

Stream gradient - Wikipedia, the free encyclopedia
en.wikipedia.org/wiki/Stream_gradient
A high gradient indicates a steep slope and rapid flow of water (i.e. more ability to erode); whereas a low gradient indicates a more nearly level stream bed and ...

Channel types - Wikipedia, the free encyclopedia
en.wikipedia.org/wiki/Channel_types
Low gradient channels‎: Low gradient channels of rivers and streams can be divided into braided ...



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Note added at 10 hrs (2011-09-11 18:08:10 GMT)
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@Phil Curry:

Based further on your above discussion entry, ***styrt*** would translate as ***transverse surface level gradient***:

sources:

Stream Gradient definition of Stream Gradient in the Free Online ...
encyclopedia2.thefreedictionary.com/Stream+Gradient
Information about Stream Gradient in the Columbia Encyclopedia, Computer ... This gradient amounts to several cm per km for typical streams on level ground and to ... ***surface of a stream may exhibit what may be called a transverse gradient***, ...

Discharge estimation in a backwater affected meandering river
adsabs.harvard.edu/abs/2011HESSD...8.2667H
H Hidayat - 2011 -
Discharge estimation in a backwater affected meandering river ... level gauge to estimate the longitudinal surface level gradient, but this is cumbersome in a lowland meandering river with considerable ***transverse surface level gradients***.

XML
www.hydrol-earth-syst-sci.net/15/2717/.../hess-15-2717-2011...
30 Aug 2011 – ... but this is cumbersome in a lowland meandering river with considerable ***transverse surface level gradients***. Recent developments allow river ...

Flood control and drainage engineering -
books.google.com/books?isbn=9061914817...
Some Nath Ghosh - 1997 - Technology & Engineering - 299 pages
(v) If the gradients and levels thus obtained are incompatible the streamlines must be ... ***the water surface will fall and a transverse gradient will be established***. ...

Torrent control and streambed stabilization -
books.google.com/books?isbn=9251024243...
F. López Cadenas de Llano, Food and Agriculture Organization of the United Nations - 1993 - Nature - 166 pages
This creates a ***transverse surface pressure gradient*** which, combined with other ... stream by matching sections and slopes to the different discharge levels ...


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Note added at 10 hrs (2011-09-11 18:10:44 GMT)
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summing up:

modifying 3 transverse surface level gradients to riffle-pool sequences or pool-riffle sequences / spawning banks




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Note added at 16 hrs (2011-09-11 23:36:30 GMT)
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fish ladders apply more to steep-gradient streams

there are images on the internet of fishways with just one or two "rungs / steps" which could also apply to low-gradient streams

in your context the riffle-pool sequences or pool-riffle sequences function exactly like fishways