My WebLink
|
Help
|
About
|
Sign Out
Home
Browse
Search
7926
CWCB
>
UCREFRP
>
Public
>
7926
Metadata
Thumbnails
Annotations
Entry Properties
Last modified
7/14/2009 5:02:31 PM
Creation date
5/22/2009 5:28:46 PM
Metadata
Fields
Template:
UCREFRP
UCREFRP Catalog Number
7926
Author
Annear, T. C. and A. L. Conder.
Title
Relative Bias of Several Fisheries Instream Flow Methods.
USFW Year
n.d.
USFW - Doc Type
Cheyenne, Wyoming.
Copyright Material
NO
There are no annotations on this page.
Document management portal powered by Laserfiche WebLink 9 © 1998-2015
Laserfiche.
All rights reserved.
/
28
PDF
Print
Pages to print
Enter page numbers and/or page ranges separated by commas. For example, 1,3,5-12.
After downloading, print the document using a PDF reader (e.g. Adobe Reader).
Show annotations
View images
View plain text
<br /> <br />WUA equate with some means of fish habitat or standing crop. <br /> <br /> <br />mendations. The decision~making process is clear and defensible and the me <br /> <br />is not burdened by unquantifiable assumptions such as that wetted perimeter <br /> <br />assumption is that the defined flow is as adequate for the rest <br /> <br />it is for the specified segment or habitat type. The user is further afforded <br /> <br />the flexibility to alter criteria for unique streams, species or life stages of <br /> <br />fish, or aquatic invertebrates. <br /> <br />Physical Habitat Simulation Models <br /> <br />None of the PHABSIM methods showed a sfgnificant lack of bias. Likewise, no <br /> <br />significant tendencies were noted. However, a closer analysis of IFG-4 results <br /> <br />revealed a distinct pattern when arranged by stream size (Table 6). From these <br /> <br />data, it appears that these methods tend to provide relatively high MF estimates <br /> <br />on small streams (<30 c fs AF) and relatively low MF es timates on larger streams <br /> <br />(> 1 00 c f s AF). <br /> <br />On smaller streams we surmise that WUA increases as the water surface eleva- <br /> <br />tion rises to and exceeds bank full. The possible reduction in WUA in the main <br />. <br /> <br />channel caused by increased velocities may, be outweighed ,by increases in WUA <br /> <br />along the stream edges, resulting in the high preferred flow estimate. <br /> <br />In larger streams, boundary-layer velocities (stream sides and bottom) may <br /> <br />be a more important habitat component for trout than mean column velocities. In <br /> <br />these streams, IFG-4 results show that higher flO\JS are detrimental due to <br /> <br />higher mean column velocities while in fact boundary layer velocities may be <br /> <br />within a preferred range. The model shows increased WUA at lower flows based on <br /> <br />12 <br />
The URL can be used to link to this page
Your browser does not support the video tag.