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 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 withsubstantial grass roots in top 0.10 or 0.15 m of soil.

Constantin-Chromel TC’s, Type E,~ 1 mm diameter, Soldered at ends and potted in plastic suringe package-tipsusing silicone sealer.

Placement of Thermocouples into the Soil Profile at the Hollister EPSCoR Sagebrush Flux Site

Excavated hole, refilled to near original densityusing six layers in original order

Dr. Richard G. Allen and Dr. Wengang Zhao, Univ. Idaho, 9/28/2011 Graphic by Allen

#1 - 0.02 m

#8 - 0.40 m

#7 - 0.32 m

#6 - 0.24 m

#5 - 0.18 m

#4 - 0.12 m

#3 - 0.08 m

#2 - 0.04 m

Rock

low density soilb.d.~ 1.2?

very dense soilb.d.~ 1.5?

mod. dense soilb.d.~ 1.35?

occaisional rocks~ 60 mm diam.throughout profile

substantial grass rootsto 0.10 m

thermocouple tip inserted horizontally into undisturbed profile

Location of soil temperatureprofile prior to installation. Hollister Sagebrush site –EC Location 1Soil sensor subsite 2Viewing from north to south

Location of soil temperatureprofile prior to installation. Hollister Sagebrush site –EC Location 1Soil sensor subsite 2Viewing from east to west

Installation of soil temperatureprofile -- 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 temperatureprofile -- 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 temperatureprofile after installation. Hollister Sagebrush site –EC Location 1Soil sensor subsite 2---left---Viewing from west to east showingbrown TC wires (1-8) entering ground and relativelyundisturbed aftermath---bottom---View from tripod