Field Notes
<--2021-03-16 09:20:00 | 2021-03-30 09:15:00-->Other sites visited today: Sherman Wetland
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Hill Slough: 2021-03-25 09:00:00 (DOY 84)
Author: Joe Verfaillie
Others: Daphne
Summary: Working trip, new power line, 4-way net rad, FD chamber, soil cores, bolts, cleaning, tightening, measured sensor locations
| Hill Slough 2021-03-25 Daphne and I arrived at about 9:00 PDT. It was cool, clear and sunny with a cold breeze that died. The marsh is still brown but lots of green grass on the levees and some green on the higher ground to the north. Brett called to say someone had seen us entering the site and was worried we were up to something nefarious. There were some wet spots on the ground surface and the well water level was 2.97ft. This was a working trip to tie up loose ends. I ran a new power line with two strands of 12 gauge wire inside 1/2 inch drip tubing. Hope fully this will keep the water out and critters away. This also removed two splices at either end due to the just too short extension cord that was removed. I also cleaned up the wiring inside the battery box and mounted the charge controller and breakers inside the box. I locked the box and tightened the security bolts on the solar panels. At the Tower Daphne added the NR01 4-way net radiometer sn 2420. The NR-LITE was moved from the end of the round tube to the end of the square boon side-by-side with the round tube. The NR01 was mounted on the end of the round tube. Daphne also added FD chamber sn FD20190028 on a short collar. I added the missing bolt on the radiation boom L-bracket near the pivot. The nut on the pivot bolt keeps getting loose – I think it needs a lock washer. When the power was restored, Daphne upgraded the LI-7550 sn AIU-0650 from v8.5.0 to v8.8.32. Afterwards she checked the GHG columns, the clocks and that the USB was logging – all seemed well. The 7500 read: 410ppm CO2, 378mmol/m3 H2O, 15.3C, 101.2kPa, 98SS – 99 after cleaning. The 7700 read: 1.97ppm CH4, 25RSSI – 65 after cleaning The wash reservoir was full and I replaced the filter that I removed last time near the bottom of the reservoir. The blockage seemed to be in the tubing near the filter rather than the filter itself but I back flushed the filter to clean it out. Daphne collected the flux, met and camera data. She straightened the pi-cam and tilted its FOV downward a little more. She uploaded a new CR1000 program that scans the soil moisture sensors every 10 minutes instead of every 10 seconds. I collected two pairs (0-5cm and 5-10cm) of soil samples for bulk density and soil moisture near the two TDR probes. The top 5cm of soil is very fibrous and peaty. At 5 to 10cm it transitions to a gooey clay. I measured locations of all the sensors and added bolts to firmly connect the scaffolding frames. We took one of the two lower boardwalks to use at SW for chamber work. We left at 13:00 |
0 photos found
4 sets found
20 HS_met graphs found
4 HS_flux graphs found
1 HS_cam graphs found
Can't check HS_Processed
2 HS_Processed graphs found