Dataset

Database Code

TD010

Title

Origin of large woody debris in streams in the western Cascades of Oregon and Washington and the Oregon Coast Range, 1981 (Helen McDade thesis)

Abstract

The objective of this study was to determine the source-distance patterns of coarse woody debris in selected streams flowing through natural conifer forests in the Cascade and Coast mountains of western Oregon and Washington. Several stand and landform conditions were sampled to estimate their effects on source-distance patterns of stream-side forests. We sampled old-growth and mature forests containing conifers and hardwoods to provide data on a range of tree heights. Hillslope steepness was considered in the sampling because we expected that if debris slid down steep slopes, source distances would be greater at sites with steeper side slopes and narrower floodplains. Sampled sites included a range of stream orders from first to third because floodplain width in this region generally increases with increasing stream order.

Keywords

detritus; coarse woody debris; organic matter; streams; H. J. Andrews Experimental Forest (AND); organic matter

Date begin

1981-09-08

Date end

1981-09-21

Principal Investigator

Frederick J. Swanson

Entities

1. TD01001

1. TD01001 - Attribute list

Attribute definitions

AGECL

Age class of forest

ANGSL

Slope angle at origin of piece

BDP

Bench distance from origin to piece

BDS

Bench distance from origin to stream, if bench present.

CATG

Category of piece(uproot,top,log)

DATACODE

Osu forest science data bank i.d. number

DBH

Dbh of origin of piece

DIAMP

Diameter of piece at stream

DIREC

Direction of origin from stream (n,s,e,w)

DISTANCE

Horizontal perpendicular distance from origin of piece to stream (equals tdph*cos(orientation)

FORMAT

Card type

LIC

Length of piece in stream channel

LOCA

General geographical location of stream

LT

Total length of piece

LTC

Length from end of piece to stream

ORD1

Indicator variable for first order streams

ORD2

Indicator variable for second order streams

ORIEN

Orientation of piece at stream

PIECE

Piece number, 30 pieces per stream

SDP

Slope distance from origin to piece.

SDPH

Horizontal slope distance- origin to piece..equals [cosine(angsl)xsdp]

SDS

Slope distance from origin of piece to bench, if bench present, or to stream if no bench present.

SDSH

Horizontal slope distance from origin to bench, if bench present, or to strm if no bench. equals [cosine(angsl)xsds]

SLCL

Steepness class of slopes

SPP

Species code according to Garrison et al., 1972

STAT

Mortality status of piece when entering stream

STDP

Destance in stream, origin to piece (only applies if end of piece is in strm channel)

STRM

Name of stream

STRORDER

Stream order

TDPH

Total horizontal distance-origin to piece. equals [sdph+bdp+stdp]

TDSH

Total horizontal distance from origin to stream. equals [sdsh+bds).

Enumerated domains

Enumerated domain for attribute: LOCA

Enumerated domain for attribute: STRM

Enumerated domain for attribute: STRORDER

Enumerated domain for attribute: ORD1

Enumerated domain for attribute: ORD2

Enumerated domain for attribute: AGECL

Enumerated domain for attribute: SLCL

Enumerated domain for attribute: DIREC

Enumerated domain for attribute: SPP

Enumerated domain for attribute: CATG

Enumerated domain for attribute: STAT