Field Notes

<--2020-09-10 13:25:00 | 2020-09-23 09:30:00-->
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West Pond: 2020-09-22 10:10:00 (DOY 266)
Author: Ariane Arias-Ortiz
Others:

Summary: Surface and porewater sampling, the wetland is flooded, water coming out the inlet is a bit more saline than in the past

I arrived at 10:10 am. It was a sunny day, blue sky and light breeze. The visit was to sample surface and porewaters after the wetland has been flooded again. The inlet was on, and the water level was at 68 cm. There was standing water at all sites across the wetland, I had to use waders for the first time at West Pond.

I started at the tower and collected surface and porewaters (at -10, -30, -50 cm). Then I moved to the 0.5 footprint site and sampled surface and porewaters (at -10, -20, -30, -40, -50, -60 cm). I used the YSI single analyte probes this time to measure salinity conductivity and pH. Probes were calibrated before sampling.

Water conductivity was much higher than in previous samplings during the year (they were similar to MyB). The water flowing out of the inlet had a conductivity of 710 uS when this is usually of 160-170 uS. As a consequence conductivity/salinity values were higher across the wetland compared with previous flooding events. pH values were lower within the wetland that in the inlet. The lowest pH values were at the tower reaching 3.58 in porewaters. I am curious to see how the biogeochemistry develops and compare conductivity values with the tower probe.

Readings at the tower:
Conductivity: 710 uS
Salinity: 0.3 ppt
pH: 6.02
T: 20.6 C

Porewater readings (average across depths)
Conductivity: 1745 uS
Salinity: 0.9 ppt
pH: 4.44
T: 20.4

I left at 12:30

0 photos found

8 sets found

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1 WP_DO graphs found