# Fall directions and breakage of trees along streams in the Pacific Northwest, 2000-2002 ## Dataset - **Database Code:** TD042 - **Title:** Fall directions and breakage of trees along streams in the Pacific Northwest, 2000-2002 - **Abstract:** This database contains data on patterns of fall and breakage by riparian trees along streams in the Pacific Northwest. Data in these tables were collected from 2000-2002. Two tables are included. (1) site descriptions and (2) tree fall. The site descriptions table contains information on the geographic location (general physiographic location, political state, and river drainage basin), physical aspects of the channel (active channel width, valley floor width, and channel gradient), and structure of the riparian forest (general age, tree density and basal area, and average tree height/diameter breast height ratio of down trees at the site). Physical aspects of the channel are average values taken at 20-m intervals within the site except for channel gradient, which are average values for 100-m intervals. Stand density (trees per ha) and basal area (m per ha) were measured with the point- center quarter method, please see Dan Sobota's Master's thesis (Pub 4337) for more details. The tree fall table contains information on individual trees measured at each site in the study. Species, geomorphic landform of rooting position, streamside location, and type of tree fall (stem break or root throw event) are descriptive variables for each tree. Tree height, diameter at breast height and diameter at the top of the tree describe tree size. Side slope at tree base and distance from the active channel describe the physical location of the tree along the stream. Number of pieces only includes those produced when the tree first fell. Fall direction is normalized to 0 degrees upstream and 90 degrees directly towards the stream for trees located on both stream banks. - **Keywords:** disturbance; wood; woody debris; organic matter; trees; riparian ecosystems; disturbance; organic matter - **Temporal coverage:** 2000-01-09 to 2002-06-21 - **Principal Investigator:** Stanley V. Gregory ## Data Entities 1. TD04201 2. TD04202 ## Entity 1: TD04201 ### Attribute list - **DBCODE** — varchar, enum Database Code - **TD042** — FSDB Database Code TD042 - **ENTITY** — numeric(1), range 1.0000 9.0000, number Entity number - **YEAR** — datetime, freetext Year of measurements - **REGION** — varchar, enum Regional location of the site - **ICB** — Interior Columbia River Basin - **WCC** — West of the Cascades Crest - **FORAGE** — numeric(10.000000), range 0.0000 500.0000, number of years Riparian forest age of the site - **SITECODE** — varchar, enum Site code - **BIG** — BIG CREEK - **BLO** — BLOOM CREEK - **CED** — CEDAR CREEK - **CRI** — CRIM CREEK - **FLY** — FLYNN CREEK - **FOR** — FORKS CREEK - **GC** — GREEN CANYON CREEK - **GOA** — GOAT CREEK - **HAG** — HAGAN CREEK (WET GULCH) - **LIT** — LITTLE CREEK - **MAC** — MACK CREEK - **MCC** — McCAIN CREEK - **MUR** — MURR CREEK - **NFC** — NORTH FORK OF CABIN CREEK - **NFG** — NORTH FORK OF THE NORTH FORK OF GATE CREEK - **PIP** — PIPER CREEK - **SFC** — SOUTH FORK OF CABIN CREEK - **SQU** — SQUEEZER CREEK - **STI** — STILLMAN CREEK - **STU** — STURDY CREEK - **WFM** — WEST FORK OF MICA CREEK - **ST** — varchar, enum State location of site - **OR** — Oregon - **WA** — Washington - **ID** — Idaho - **MT** — Montana - **DRAIN** — varchar, enum River Drainage of site - **ALS** — ALSEA RIVER - **CHE** — CHEHALIS RIVER - **GRE** — GREEN RIVER - **GRO** — GRANDE RONDE RIVER - **MCK** — MCKENZIE RIVER - **MFW** — MIDDLE FORK WILLAMETTE RIVER - **NSA** — NORTH SANTIAM RIVER - **POT** — POTLATCH RIVER - **STJ** — ST. JOE RIVER - **SWA** — SWANN RIVER - **THO** — THOMPSON RIVER - **WIL** — WILLAPA RIVER - **YAK** — YAKIMA RIVER - **LGTH** — numeric(20.000000), range 0.0000 300.0000, meters Reach length of the site - **ACW** — numeric(0.100000), range 0.0000 14.9000, meters Average width of the active channel by site - **CON** — numeric(0.100000), range 0.0000 105.3000, meters Valley floor width of the site - **GRAD** — numeric(0.100000), range 0.0000 13.3000, percent Stream gradient of the site - **DENS** — numeric(0.100000), range 0.0000 1751.0000, number per hectare Riparian forest density of the site - **BAS** — numeric(0.100000), range 0.0000 155.0000, square meters per hectare Riparian forest basal area of the site - **HTDBH** — numeric(0.100000), range 0.0000 87.0000, number Ratio of tree height/diameter at breast height for the site riparian forest ## Entity 2: TD04202 ### Attribute list - **DBCODE** — varchar, enum Database Code - **TD042** — FSDB Database Code TD042 - **ENTITY** — numeric(1), range 1.0000 9.0000, number Entity number - **SITECODE** — varchar, enum Site code - **BIG** — BIG CREEK - **BLO** — BLOOM CREEK - **CED** — CEDAR CREEK - **CRI** — CRIM CREEK - **FLY** — FLYNN CREEK - **FOR** — FORKS CREEK - **GC** — GREEN CANYON CREEK - **GOA** — GOAT CREEK - **HAG** — HAGAN CREEK (WET GULCH) - **LIT** — LITTLE CREEK - **MAC** — MACK CREEK - **MCC** — McCAIN CREEK - **MUR** — MURR CREEK - **NFC** — NORTH FORK OF CABIN CREEK - **NFG** — NORTH FORK OF THE NORTH FORK OF GATE CREEK - **PIP** — PIPER CREEK - **SFC** — SOUTH FORK OF CABIN CREEK - **SQU** — SQUEEZER CREEK - **STI** — STILLMAN CREEK - **STU** — STURDY CREEK - **WFM** — WEST FORK OF MICA CREEK - **LAND** — varchar, enum landform of tree rooting position - **CHA** — Active channel - **FLO** — Floodplain - **HIL** — Hillslope - **TER** — Terrace - **SIDE** — varchar, enum streamside location of tree - **L** — Left streamside - **R** — Right streamside - **SPP** — varchar, enum species type - **ABGR** — Abies grandis - **ACCI** — Acer circinatum - **ACGL** — Acer glabrum - **ACMA** — Acer macrophyllum - **ALNUS** — Alnus - **ALRH** — Alnus rhombifolia - **ALRU** — Alnus rubra - **LAOC** — Larix occidentalis - **PIEN** — Picea engelmannii - **PISI** — Picea sitchensis - **PICO** — Pinus contorta - **PIPO** — Pinus ponderosa - **PSME** — Pseudotsuga menziesii - **THPL** — Thuja plicata - **TSHE** — Tsuga heterophylla - **TYPE** — varchar, enum mode of tree fall - **RT** — Root throw - **SB** — Stem break - **DBH** — numeric(1), range 0.0000 2.6300, meters diameter at breast height - **TOPDBH** — numeric(1), range 0.0000 1.1000, meters diameter at top of tree - **HT** — numeric(1), range 0.0000 68.0000, number tree height - **PCE** — numeric(1), range 1.0000 9.0000, number number of pieces associated with the tree - **DISTANCE** — numeric(1), range 0.0000 70.0000, meters ground distance of the tree base from the active channel margin - **SLOPE** — numeric(1), range -20.0000 144.4000, percent side slope steepness at the tree base - **FALL** — numeric(1), range 1.0000 360.0000, degrees angle fall direction of the tree, normalized to stream valley orientation and streamside ## Attribute Definitions **ACW** Average width of the active channel by site **BAS** Riparian forest basal area of the site **CON** Valley floor width of the site **DBCODE** Database Code **DBH** diameter at breast height **DENS** Riparian forest density of the site **DISTANCE** ground distance of the tree base from the active channel margin **DRAIN** River Drainage of site **ENTITY** Entity number **FALL** fall direction of the tree, normalized to stream valley orientation and streamside **FORAGE** Riparian forest age of the site **GRAD** Stream gradient of the site **HT** tree height **HTDBH** Ratio of tree height/diameter at breast height for the site riparian forest **LAND** landform of tree rooting position **LGTH** Reach length of the site **PCE** number of pieces associated with the tree **REGION** Regional location of the site **SIDE** streamside location of tree **SITECODE** Site code **SLOPE** side slope steepness at the tree base **SPP** species type **ST** State location of site **TOPDBH** diameter at top of tree **TYPE** mode of tree fall **YEAR** Year of measurements ## Enumerated Domains ### DBCODE - **TD042** — FSDB Database Code TD042 ### REGION - **ICB** — Interior Columbia River Basin - **WCC** — West of the Cascades Crest ### SITECODE - **BIG** — BIG CREEK - **BLO** — BLOOM CREEK - **CED** — CEDAR CREEK - **CRI** — CRIM CREEK - **FLY** — FLYNN CREEK - **FOR** — FORKS CREEK - **GC** — GREEN CANYON CREEK - **GOA** — GOAT CREEK - **HAG** — HAGAN CREEK (WET GULCH) - **LIT** — LITTLE CREEK - **MAC** — MACK CREEK - **MCC** — McCAIN CREEK - **MUR** — MURR CREEK - **NFC** — NORTH FORK OF CABIN CREEK - **NFG** — NORTH FORK OF THE NORTH FORK OF GATE CREEK - **PIP** — PIPER CREEK - **SFC** — SOUTH FORK OF CABIN CREEK - **SQU** — SQUEEZER CREEK - **STI** — STILLMAN CREEK - **STU** — STURDY CREEK - **WFM** — WEST FORK OF MICA CREEK ### ST - **OR** — Oregon - **WA** — Washington - **ID** — Idaho - **MT** — Montana ### DRAIN - **ALS** — ALSEA RIVER - **CHE** — CHEHALIS RIVER - **GRE** — GREEN RIVER - **GRO** — GRANDE RONDE RIVER - **MCK** — MCKENZIE RIVER - **MFW** — MIDDLE FORK WILLAMETTE RIVER - **NSA** — NORTH SANTIAM RIVER - **POT** — POTLATCH RIVER - **STJ** — ST. JOE RIVER - **SWA** — SWANN RIVER - **THO** — THOMPSON RIVER - **WIL** — WILLAPA RIVER - **YAK** — YAKIMA RIVER ### LAND - **CHA** — Active channel - **FLO** — Floodplain - **HIL** — Hillslope - **TER** — Terrace ### SIDE - **L** — Left streamside - **R** — Right streamside ### SPP - **ABGR** — Abies grandis - **ACCI** — Acer circinatum - **ACGL** — Acer glabrum - **ACMA** — Acer macrophyllum - **ALNUS** — Alnus - **ALRH** — Alnus rhombifolia - **ALRU** — Alnus rubra - **LAOC** — Larix occidentalis - **PIEN** — Picea engelmannii - **PISI** — Picea sitchensis - **PICO** — Pinus contorta - **PIPO** — Pinus ponderosa - **PSME** — Pseudotsuga menziesii - **THPL** — Thuja plicata - **TSHE** — Tsuga heterophylla ### TYPE - **RT** — Root throw - **SB** — Stem break