Field Notes

West Pond: 2014-01-23 12:20:00 (DOY 23)
Author: Joe Verfaillie
Others: Patty

Summary: Water low - increased flow at inlet, East Pond bulldozed, installed new Forerunner CO2 probe.

West Pond
2013-01-23

I arrived about 12:20 with Patty. It was hazy, sunny and mild with little to no wind. Strangely, in Berkeley this morning it was clear with strong gusty winds. Jim was busy with a bulldozer in the East Pond. He was pushing all the vegetation out of the pond onto the sides. From there they were spreading them around the new wetland. Jim promised to avoid our solar panels.

The inlet was running but at a low level. The water in the West Pond was well down below the CO2 and conductivity sensors but the DO was still in a bit of water. On the way out I increased the inlet flow about double on Jimâ€™s advice.

The 7500 read: 437ppm CO2, 322mmol/m3 H2O, 17.5C, 101.3kPa, 96.26SS
The 7700 read: 2.333ppm CH4, 32.6 RSSI â€“ after cleaning 85.6 RSSI
The wash reservoir was full

We installed the new GP-001 water proof CO2 sensor from Forerunner sn GP2013ex01. It was a simple 12V power and three SE voltage measurements giving CO2, Temperature and RH inside the housing. The measurements are recorded as mV. All data was collected before and new program was uploaded to the CR1000. In air the probe read 77, 3311, 2392, in water the CO2 quickly climbed to 455mV and was still climbing.

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20140123WP_EastPond.jpg ( 2014-01-23 14:08:05 ) Full size: 1920x1440
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