EOS Land Validation Core Site #23:
Walker Branch
Land Cover at Core Site, draped over elevation. Vertical
Exaggeration = .00024
Sun Azimuth = Southeast, at 135° Sun Altitude
= Low, at 29.02°
EOS Land Validation Core Site #23:
Walker Branch
Land Cover at Core Site, draped over elevation. Vertical
Exaggeration = .00024
Sun Azimuth = Southeast, at 135° Sun Altitude
= Low, at 29.02°
Summary
Reference
Land Cover
Percent Tree Cover
Biomes
Elevation
Soils
Climate
In Situ Measurements
Population
Data Sets
The Walker Branch research site is located in the
southeastern United States on the U.S. Department of Energy's Oak Ridge
Reservation in Anderson County, Tennessee, spanning across 100 ha.
Current projects investigate soil and precipitation chemistry and hydrogeochemical
topics to contribute to a greater understanding of how forest watersheds
function.
This information was gathered from web
resources, and through correspondence with Paul
Hanson.
| Site Name: | Walker Branch |
| Site Number: | 23 |
| Reference Map: | Map |
| Latitude: | 35.9 |
| Longitude: | -84.3 |
| Country: | United States |
| Administrative Unit: | Tennessee |
| Affiliations: | OHER, ORNL |
| Contact: | Paul J. Hanson
Walker Branch Project Coordinator Environmental Sciences Division Oak Ridge National Laboratory PO Box 2008, Building 1059 Oak Ridge, TN 37831-6422 pjx@ornl.gov http://www.esd.ornl.gov/programs/WBW |
Area Tree Cover Map
BIOME LEVEL GENERALIZED LAND COVER
metadata
Site Point Biome: Broadleaf Forest
Area Biome Map
Area Biome Percentages Pie Chart
ELEVATION
metadata
| Site Elevation: | 330 meters |
| Elevation Map | Map |
| Mean Area Elevation: | 398 meters |
| Minimum Area Elevation: | 91 meters |
| Maximum Area Elevation: | 1981 meters |
| Mean Area Slope: | 89.833° |
| Area Slope Geary Coefficient: | 0.032 |
| Area Mean Aspect: | 185.880 |
SOILS
metadata
Site Point Major Soils Type: (32) dystric cambisols
Soils Map
| Value | Major Type | Area % | Water Regime |
| 32 | dystric cambisols | 29.4 | percolative |
| 104 | chromic luvisols | 63.3 | stagnant |
| 118 | rhodic-rendzicleptosols | 7.2 | non-percolative |
1985-1992 CLIMATE MEANS
metadata
| Minimum Mean January Precipitation: | 0.97 mm |
| Maximum Mean January Precipitation: | 2.50 mm |
| Mean January Precipitation: | 1.72 mm |
| Minimum Mean July Precipitation: | 2.00 mm |
| Maximum Mean July Precipitation: | 5.24 mm |
| Mean July Precipitation: | 3.39 mm |
| Minimum Mean January Temperature: | -1.76° C |
| Maximum Mean January Temperature: | 6.49° C |
| Mean January Temperature: | 2.16° C |
| Minimum Mean July Temperature: | 17.36° C |
| Maximum Mean July Temperature: | 22.56° C |
| Mean July Temperature: | 18.66° C |
| Instruments: | Observations: | Intervals: |
| Spectrophotometer | a spectrophotometer is not currently in use at this site | - |
| Meteorological Tower (includes the use of a LiCor Quantum Sensor, a Kipp and Zonen Net Radiometer, a REBS Net Radiometer, and an Eppley, Spectrosun, and LiCor Pyranometers) | measures incident photosynthetically active radiation (quantum sensor), and incident shortwave radiation (LiCor pyranometer); the radiometer and one of the LiCor sensors are located beneath the canopy; the tower consists of a 44m tall stairway tower and two 33m triangular towers, with eight parallel pairs of cables mounted at seven levels throughout and above the canopy | average hourly measurements of all data are recorded |
| Deposition Monitoring Network | collects data on the chemistry of precipitation; wet deposition collectors trap precipitation for analysis of trace metal and major ion chemistry | ongoing since 1976 |
| Subsurface Weirs | hydrogeochemical transport through soils is observed by an isolated soil pedon and a subsurface weir; the soil pedon is placed at nine depths with solution samplers; a trench allows subsurface and surface flow to be measured in a tipping bucket rain gauge connected to a computer data acquisition system | average hourly measurements are recorded |
| Weirs | weirs are located at stream gauging stations to measure maximum and normal flows; weirs have water samplers to collect a sample proportional to stream flow | average hourly measurements are recorded |
POPULATION
metadata
| Population Map: | Map |
| Site Population per Square Mile: | 131 |
| Mean Area Population per Square Mile: | 40.63 |
Data Sets
Further information regarding the generation of these materials.
Access Characterizations Spreadsheet, GeoTIFFs & Grid files on CD-ROM
(In the 'eos_data' folder of the CD-ROM, available at the GLCF)
Access Core Site Characterizations Statistics Spreadsheet via FTP
(Single MS Excel 97 file containing statistics for all Core Sites)
Access Characterization Layer GeoTIFFs and Grid files at the
UMD
GLCF
(GeoTIFFs and Grid export files derived from data listed above; via FTP)
Access Legend Code information for the Characterization Layer data sets
Access In Situ Field Measurements via the ORNL
DAAC Mercury System
(Detailed measurement and instrument information)
Return to The Global Land Cover Facility
Return to EOS Land Validation Core Sites
Last Content Update: October 1999; Last Links Update January 2007 Contact: Webmaster
