# Road-related erosion from the February 1996 flood in the Lookout Creek and Blue River watersheds, Oregon

## Dataset

- **Database Code:** GE008

- **Title:** Road-related erosion from the February 1996 flood in the Lookout Creek and Blue River watersheds, Oregon

- **Abstract:**

Studies of the effects of forest roads on mountain watersheds (e.g. Jones and Grant 1996; Wemple et al. 1996) led to asking how sedimentation processes were affected by roads during the flood of February, 1996. Of interest were how roads influenced erosional processes and how flood-induced erosion affected the transportation network. By employing concepts of sediment budgeting and disturbance cascades, this study aims to create a landscape context for understanding the impact of an extensive road network on the geomorphic imprint left by this flood of record in February 1996.


- **Keywords:** debris flows; landslides; disturbance; erosion; sedimentation; inorganic nutrients; roads; disturbance; inorganic nutrients

- **Temporal coverage:** 1999-05-02 to 1999-09-02

- **Principal Investigator:** Julia A. Jones


## Data Entities

1. GE00801

## Entity 1: GE00801

### Attribute list

- **STCODE** — varchar, freetext

Study code


- **FORMAT** — numeric(1), range  1.0000  1.0000, number

Format number


- **F_NUMBER** — numeric(1.000000), range  1.0000  103.0000, number

Feature number (erosional or depositional features)


- **F_TYPE** — varchar, enum

Type of feature (based on the point of origin relative to road network)

  - **hs** — Hillslope slides
  - **ff** — Fillslope slides
  - **cf** — Cutslope slides
  - **df** — Debris flows
  - **s** — Slumps
  - **pc** — Plugged culverts
  - **id** — Incised ditches
  - **g** — Gullies


- **LANDSLIDE** — varchar, freetext

Refers to identification number in Swanson/Wallenstein inventory of landslides - see GE007


- **VOL_H** — numeric(1.000000), range  0.0000  6000.0000, cubic meters

Volume of hillslope material


- **VOL_S** — numeric(1.000000), range  0.0000  4750.0000, cubic meters

Volume stored on the road


- **VOL_T** — numeric(1.000000), range  0.0000  5000.0000, cubic meters

Volume transported through the road


- **VOL_R** — numeric(1.000000), range  0.0000  6255.0000, cubic meters

Volume of road material


- **VOL_OUT** — numeric(1.000000), range  0.0000  6255.0000, cubic meters

Volume yielded below the road


- **BASIN** — varchar, enum

Refers to basin where feature was mapped

  - **lo** — Lookout creek
  - **br** — Upper blue river


- **DECADE** — varchar, enum

Refers to decade of construction for road on which feature was mapped

  - **50** — Before 1950
  - **60** — Before 1960
  - **70** — 1961-1970
  - **80** — 1971-1980
  - **90** — 1981-1990


- **ELEV** — varchar, enum

Refers to elevation zone in which feature was mapped

  - **1** — 400-800 meter elevation
  - **2** — 801-1200 meter elevation
  - **3** — >1200 meter elevation


- **POSITION** — varchar, enum

Landscape position of inventoried feature

  - **m** — Midslopes: everything not defined as valley floor or ridge/upslope
  - **v** — Valley floors: delineated with a 200 meter buffer around fifth-order streams and delineated with a 100 meter buffer around fourth-order streams
  - **r** — Riddges/upperslopes defined with a 100 meter buffer on a linear network of ridges digitized from 7.5' topographic maps


- **ASSOC** — varchar, freetext

Refers to number of associated feature


## Attribute Definitions

**ASSOC**

Refers to number of associated feature


**BASIN**

Refers to basin where feature was mapped


**DECADE**

Refers to decade of construction for road on which feature was mapped


**ELEV**

Refers to elevation zone in which feature was mapped


**FORMAT**

Format number


**F_NUMBER**

Feature number (erosional or depositional features)


**F_TYPE**

Type of feature (based on the point of origin relative to road network)


**LANDSLIDE**

Refers to identification number in Swanson/Wallenstein inventory of landslides - see GE007


**POSITION**

Landscape position of inventoried feature


**STCODE**

Study code


**VOL_H**

Volume of hillslope material


**VOL_OUT**

Volume yielded below the road


**VOL_R**

Volume of road material


**VOL_S**

Volume stored on the road


**VOL_T**

Volume transported through the road


## Enumerated Domains

### F_TYPE

- **hs** — Hillslope slides

- **ff** — Fillslope slides

- **cf** — Cutslope slides

- **df** — Debris flows

- **s** — Slumps

- **pc** — Plugged culverts

- **id** — Incised ditches

- **g** — Gullies

### BASIN

- **lo** — Lookout creek

- **br** — Upper blue river

### DECADE

- **50** — Before 1950

- **60** — Before 1960

- **70** — 1961-1970

- **80** — 1971-1980

- **90** — 1981-1990

### ELEV

- **1** — 400-800 meter elevation

- **2** — 801-1200 meter elevation

- **3** — >1200 meter elevation

### POSITION

- **m** — Midslopes: everything not defined as valley floor or ridge/upslope

- **v** — Valley floors: delineated with a 200 meter buffer around fifth-order streams and delineated with a 100 meter buffer around fourth-order streams

- **r** — Riddges/upperslopes defined with a 100 meter buffer on a linear network of ridges digitized from 7.5' topographic maps