The Twitchell East End Wetland is a newly constructed restored wetland on Twitchell Island, CA. This site and the surrounding region are part of the San Joaquin - Sacramento River Delta drained beginning in the 1850's and subsequently used for agriculture. The site was previously a corn field. The wetland was designed to have a mix of vegetated and open water channels and ponds (due to surface elevation differences). Flooding of the wetland was done gradually beginning in January, 2014. Berms wind throughout the wetland to allow vehicle access. Tule and Cattail plant material from a nearby wetland were spread along the berms immediately prior to flooding to facilitate plant establishment and stabilization of the berms from wind/water erosion. The tower was installed on November 25, 2013.
Equipment installed at the site:more details
Campbell Sci. Multiplexer AM16/32B
Campbell Sci. Multiplexer AM25T
Campbell Sci. Data Logger CR1000
Campbell Sci. Data Logger CR10X
Campbell Sci. Water Level CS451
Decagon-METER Narrow Band SRS-Ni NDVI
Fabricated Battery Bank BB-Fab
Forerunner-Eosense CO2 probe GP-001
Gill Anemometer WM 1590
Hukseflux Heat Flux Plate HFP01
Hukseflux Net Radiometer NR01
Kipp & Zonen PAR Sensor PAR-LITE
Kipp & Zonen PAR Sensor PQS 1
Licor Gas Analyzer LI-7500A
Licor Interface LI-7550
Licor Gas Analyzer LI-7700
PME DO Sensor miniDOT
Sensorex DO Sensor DO6400/T
StarDot Camera SD130BN
Texas Electronics Precipitation TR-525M
Vaisala RH & Temp HMP60
Vaisala Barometer PTB110
30 minute averages of the 20Hz flux data
Digital number data from the autocam imagery
Eddy flux from temporary tower T1 at the open water site at East End. Originally on the levee at 38.109522, -121.636071, but moved about 60m south to the location below after the first month.
Met data from Temporary tower 2 in and area with a largely closed canopy of cattails
30min averages of the 20Hz flux data from the Temporary Tower in an area with a closed canopy of cattails
Met data from East End Temporary Tower 3 on the first boardwalk to the south of the permanent tower.
30min averages of the 10Hz flux data from the East End Temporary Tower #3 on the first boardwalk south of the permanent tower.
Dissolved oxygen from the minidot sensor from different locations
Digital number data from Pheoncamera at Bouldin Alfalfa
This material is based upon work supported by the National Science Foundation and US Department of Energy. Any opinions, findings, conclusions, or recommendations expressed in the material are those of the author(s) and do not necessarily reflect the views of the supporters.