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003 OCoLC;

005 20141212011713.0;

006 m d f ;

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035 a| (Sirsi) o257637195;

035 a| (OCoLC)257637195;

043 a| n-us-ora| n-us-wa;

049 a| ERE#;

070 0 a| aSD144.A13b| E34 2008;

074 a| 0083-B-06 (online);

086 0 a| A 13.88:PNW-GTR-760;

245 00 a| Effects of forest practices on peak flows and consequent channel response :b| a state-of-the-science report for western Oregon and Washington /c| Gordon E. Grant [and others].;

260 a| [Portland, Or.] :b| U.S. Dept. of Agriculture, Forest Service, Pacific Northwest Research Station,c| [2008];

300 a| iv, 76 pages :b| digital, PDF file.;

336 a| text2| rdacontent;

337 a| computer2| rdamedia;

338 a| online resource2| rdacarrier;

490 1 a| General technical report PNW ;v| GTR-760;

500 a| Title from title screen (viewed on Dec. 2, 2008).;

500 a| "May 2008.";

504 a| Includes bibliographical references (p. 48-64).;

520 3 a| This is a state-of-the-science synthesis of the effects of forest harvest activities on peak flows and channel morphology in the Pacific Northwest, with a specific focus on western Oregon and Washington. We develop a database of relevant studies reporting peak flow data across rain-, transient-, and snow-dominated hydrologic zones, and provide a quantitative comparison of changes in peak flow across both a range of flows and forest practices. Increases in peak flows generally diminish with decreasing intensity of percentage of watershed harvested and lengthening recurrence intervals of flow. Watersheds located in the rain-dominated zone appear to be less sensitive to peak flow changes than those in the transient snow zone; insufficient data limit interpretations for the snow zone. Where present, peak flow effects on channel morphology should be confined to stream reaches where channel gradients are less than approximately 0.02 and streambeds are composed of gravel and finer material. We provide guidance as to how managers might evaluate the potential risk of peak flow increases based on factors such as presence of roads, watershed drainage efficiency, and specific management treatments employed. The magnitude of effects of forest harvest on peak flows in the Pacific Northwest, as represented by the data reported here, are relatively minor in comparison to other anthropogenic changes to streams and watersheds.;

538 a| Mode of access: Internet from the Forest Service web site. Address as of 12/2/08: http://www.fs.fed.us/pnw/pubs/pnw%5Fgtr760.pdf ; current access available via PURL.;

650 0 a| Forest hydrologyz| Oregon, Western.=| ^A119889;

650 0 a| Forest hydrologyz| Washington (State), Western.=| ^A119889;

650 0 a| Loggingx| Environmental aspectsz| Oregon, Western.=| ^A388326;

650 0 a| Forest influencesz| Oregon, Western.=| ^A21217;

650 0 a| Forest influencesz| Washington (State), Western.=| ^A21217;

650 0 a| Loggingx| Environmental aspectsz| Washington (State), Western.=| ^A388326;

650 0 a| Watershed hydrologyz| Oregon, Western.=| ^A700066;

650 0 a| Watershed hydrologyz| Washington (State), Western.=| ^A700066;

700 1 a| Grant, Gordon,d| 1953-=| ^A793767;

710 2 a| Pacific Northwest Research Station (Portland, Or.)=| ^A367712;

776 0 t| Effects of forest practices on peak flows and consequent channel responseh| iv, 76 p.w| (OCoLC)236228571;

830 0 a| General technical report PNWv| GTR-760.=| ^A420450;

856 41 u| http://www.arlis.org/docs/vol1/236228571.pdfx| Captured July 30, 2008z| PURL;

856 40 u| https://purl.fdlp.gov/GPO/LPS105991;

994 a| C0b| ERE;

998 a| 1450791;

998 a| u1450791;

596 a| 1;

999 a| CLICK ON WEB ADDRESSw| ASISc| 1i| MQ2799446l| JNETm| JOYNERr| Ys| Yt| JNE1DOu| 1/29/2009x| EDOCUMENTz| JERESOURCEo| .STAFF. 0;

Effects of forest practices on peak flows and consequent channel response : a state-of-the-science report for western Oregon and Washington / Gordon E. Grant [and others].

Other author	Grant, Gordon, 1953-
Other author	Pacific Northwest Research Station (Portland, Or.)
Format	Electronic
Publication Info	[Portland, Or.] : U.S. Dept. of Agriculture, Forest Service, Pacific Northwest Research Station, [2008]
Description	iv, 76 pages : digital, PDF file.
Supplemental Content	PURL
Supplemental Content	https://purl.fdlp.gov/GPO/LPS105991
Subjects	Forest hydrology--Oregon, Western. Forest hydrology--Washington (State), Western. Logging--Environmental aspects. --Oregon, Western. Forest influences--Oregon, Western. Forest influences--Washington (State), Western. Logging--Environmental aspects. --Washington (State), Western. Watershed hydrology--Oregon, Western. Watershed hydrology--Washington (State), Western.

Series	General technical report PNW ; GTR-760 General technical report PNW GTR-760. ^A420450
Summary	This is a state-of-the-science synthesis of the effects of forest harvest activities on peak flows and channel morphology in the Pacific Northwest, with a specific focus on western Oregon and Washington. We develop a database of relevant studies reporting peak flow data across rain-, transient-, and snow-dominated hydrologic zones, and provide a quantitative comparison of changes in peak flow across both a range of flows and forest practices. Increases in peak flows generally diminish with decreasing intensity of percentage of watershed harvested and lengthening recurrence intervals of flow. Watersheds located in the rain-dominated zone appear to be less sensitive to peak flow changes than those in the transient snow zone; insufficient data limit interpretations for the snow zone. Where present, peak flow effects on channel morphology should be confined to stream reaches where channel gradients are less than approximately 0.02 and streambeds are composed of gravel and finer material. We provide guidance as to how managers might evaluate the potential risk of peak flow increases based on factors such as presence of roads, watershed drainage efficiency, and specific management treatments employed. The magnitude of effects of forest harvest on peak flows in the Pacific Northwest, as represented by the data reported here, are relatively minor in comparison to other anthropogenic changes to streams and watersheds.
General note	Title from title screen (viewed on Dec. 2, 2008).
General note	"May 2008."
Bibliography note	Includes bibliographical references (p. 48-64).
Technical details	Mode of access: Internet from the Forest Service web site. Address as of 12/2/08: http://www.fs.fed.us/pnw/pubs/pnw%5Fgtr760.pdf ; current access available via PURL.
Issued in other form	Effects of forest practices on peak flows and consequent channel response iv, 76 p.
GPO item number	0083-B-06 (online)
Govt. docs number	A 13.88:PNW-GTR-760

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	Electronic Resources	Online Content PURL https://purl.fdlp.gov/GPO/LPS105991	✔ Available

Effects of forest practices on peak flows and consequent channel response : a state-of-the-science report for western Oregon and Washington / Gordon E. Grant [and others].

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