Placement of Thermocouples into
the Soil Profile at the Hollister
EPSCoR Sagebrush Flux Site
Sept. 28, 2011
R.Allen and W.Zhao, Univ. Idaho
Placement of Thermocouples into the Soil Profile at the Hollister EPSCoR Sagebrush Flux Site
Placement is ~ 0.2 m north and east of sensors at EC#1 site,
Soil subsite #2. Surface is bare, crusted, open, about 0.3 m to
the south and to the west of sage brush, with few grasses, but with
substantial grass roots in top 0.10 or 0.15 m of soil.
Excavated hole, refilled to near original density
using six layers in original order
#1 - 0.02 m
#2 - 0.04 m
substantial grass roots
to 0.10 m
Constantin-Chromel TC’s, Type E,
~ 1 mm diameter, Soldered at ends
and potted in plastic suringe package-tips
using silicone sealer.
low density soil
b.d.~ 1.2?
#3 - 0.08 m
#4 - 0.12 m
#5 - 0.18 m
occaisional rocks
~ 60 mm diam.
throughout profile
mod. dense soil
b.d.~ 1.35?
#6 - 0.24 m
#7 - 0.32 m
very dense soil
b.d.~ 1.5?
#8 - 0.40 m
Rock
thermocouple tip inserted horizontally into undisturbed profile
Dr. Richard G. Allen and Dr. Wengang Zhao, Univ. Idaho, 9/28/2011
Graphic by Allen
Location of soil temperature
profile prior to installation.
Hollister Sagebrush site –
EC Location 1
Soil sensor subsite 2
Viewing from north to south
Location of soil temperature
profile prior to installation.
Hollister Sagebrush site –
EC Location 1
Soil sensor subsite 2
Viewing from east to west
Installation of soil temperature
profile -- Hollister Sagebrush site –
EC Location 1, soil sensor subsite 2
---top left---beginning hole
---top right---preserving top crust
---right---hole showing grass roots along sides
Installation of soil temperature
profile -- Hollister Sagebrush site –
EC Location 1, soil sensor subsite 2
---top left---hole after excavation
---top right---thermocouple inside suringe tip
---left---soil preservation during install.
Location of soil temperature
profile after installation.
Hollister Sagebrush site –
EC Location 1
Soil sensor subsite 2
---left---Viewing from west to east showing
brown TC wires (1-8) entering ground and relatively
undisturbed aftermath
---bottom---View from tripod