HT001
Periodic stream temperature data (1957-1983) in the Andrews Experimental Forest

CREATOR(S): Sherri L. Johnson, Jack S. Rothacher

PRINCIPAL INVESTIGATOR(S): Sherri L. Johnson

ORIGINATOR(S): Jack S. Rothacher

OTHER RESEARCHER(S): Stanley V. Gregory, Julia A. Jones

ABSTRACTOR: Hazel E. Hammond, Alfred B. Levno

METADATA CREATION DATE:

7 Aug 2012

MOST RECENT METADATA REVIEW DATE:

7 Aug 2012

KEYWORDS:

Disturbance, Long-Term Ecological Research (LTER), water temperature, disturbance

PURPOSE:

To determine water temperature changes that occur when old-growth Douglas-fir forests are logged.

METHODS:

Experimental Design - HT001:

Description: Weekly maximum and minimum water temperatures were recorded at the gaging stations on three small watershed (Watersheds 1, 2, and 3) in the Andrews Experimental Forest from 1959 through 1966. The period from 1959 to 1962 represents before-logging conditions. Watershed 2, which remained undisturbed through this period, served as a control in statistical comparisons. Temperatures continued to be recorded from these watershed until 1981. From 1964 to 1980, temperatures were recorded at watersheds 6, 7, and 8. Watershed 10 temperatures were recorded from 1981 through 1983.

Field Methods - HT001:

Description: Water temperature was measured with "U" tube maximum-minimum thermometers, submerged in the stream near the gaging station on each watershed. The thermometers were checked with standard mercury thermeter at the time of each weekly reading. Linear regressions based on weekly maximum and minimum water temperatures were calculated to express the relationship of the watershed during periods representing a range in cover conditions.

Laboratory Methods - HT001:

Description: Minimum and maximum temperatures were read from strip charts.

SITE DESCRIPTION:

Gauging stations on small watershed (Watersheds 1, 2, 3, 6, 7, 8, 10) in the Andrews Experimental Forest

TAXONOMIC SYSTEM:

None

GEOGRAPHIC EXTENT:

Andrews Experimental Forest Watershed gauging stations

ELEVATION_MINIMUM (meters):

439

ELEVATION_MAXIMUM (meters):

1182

MEASUREMENT FREQUENCY:

periodic and daily

PROGRESS DESCRIPTION:

Complete

UPDATE FREQUENCY DESCRIPTION:

irregular

CURRENTNESS REFERENCE:

Ground condition