Metadata and Data Sets
| Bouldin Alfalfa || Bouldin Corn || DWR Corn || East End || East Pond || Eden Landing || Gilbert Tract || Hill Slough || Mayberry || Rush Ranch || Sherman Barn || Sherman Island || Sherman Wetland || Tonzi || Twitchell Alfalfa || Twitchell Rice || Vaira || West Pond |Summary
| Soils || Water Level || Lidar || Dist & Mgmt || Leaf Level || Spectra || Report || Isotope || Harvest || LAI || Ground Penetrating Radar || Soil Moisture || Tree Survey || Water Potential || Porewater |
| Id | Type | Site | Dates | Frequency | Title | Description |
|---|---|---|---|---|---|---|
| 5 | Dist & Mgmt | BA | 2016-08-15 - Present | Various as needed | Farm operations and observed phnomena | Dates and information on farm operations, grazing and observed phenomena gleaned from field visits, camera images and conversations. |
| 14 | Harvest | BC, BA | 2016-01-01 - 2019-01-01 | Annual harvest estimates | Bouldin Island annual farmer yield estimates, 2016, 2017, 2018 | Corn silage and alfalfa yield estimates from farmers on Bouldin Island, 2016, 2017, 2018 |
| 16 | LAI | BC, BA, TA | 2017-07-26 - 2020-07-30 | Approx. monthly during growing season with field visits | Optical LAI measured in-situ | ~10 measurements taken each time with a LAI-2200C. Most of the measurements were taken with the 2-wand method, where an "above" wand was set up on a tripod and took measurements every 5 sec, and a "below" wand was used to collect data below the crop canopy. The data were processed in the Licor software FV2200, where each "below" measurement was paired with the "above" measurement closest in time; LAI was calculated and corrected for scattering (based on 4A scattering data). Twitchell Alfalfa: 2017 (2), 2018 (2) Bouldin Alfalfa: 2017 (3), 2018 (9) Bouldin Corn: 2017 (5), 2018 (7) |
| 26 | Lidar | BA, BC, EE, MB, SB, SW, TA, WP | 2016-12-01 - 2017-03-07 | Once | Delta-wide USGS Lidar flight | Winter time Lidar flight commissioned by the USGS and flown by Woolpert. Horizontal datum: NAD83 (NSRS2007) Epoch 2017.95, UTM Zone 10N, meters. Vertical datum: NAVD88, GEOID12B, US Survey Feet, Orthometric. Includes classified point cloud, features shape files, bare earth DEM, orthometric imagery (0.3-meter16-bit 4-band RGB-IR tiles in TIFF format with World Files). The entire Delta is covered by 8 points per m2, 0.5m DEM. |
| 3 | Lidar | BA, BC, WP, EP, EE, TA, TW, MB, SB, SW | 2018-09-20 | Once | NCALM Lidar Flight | Lidar flight data collection from Kyle Hemes NCAL project: Ecosystem Structure as a Driver of Climatic, Habitat, and Hydrological Services in Heterogeneous Restored Wetlands. Point clouds (*.las files), 1m resolution DEM and DSM (arcgis GridFloat files), visible imagery (*.tif files) of Sherman, Twitchel and Bouldin Islands. UTM Zone 10N, meters, NAD83(2011) epoch 2010.00 / NAVD88 (GEOID12B) |
| 25 | Soils | SB, BC, EP, EE, BA, SW, MB | 2018-08-27 - 2018-08-28 | Once | Soil cores for C:N and microbial community | Soil samples were collected to be analyzed for soil moisture, bulk density, C:N, and microbial community. Generally at each site, two transects were sampled (T1 to the north, T2 south), starting near the tower and going to the west. Each transect had 5 sampling locations each (P1-P5), each location about 5m apart. At wetland locations (SW, MB, EE, EP, WP), soils were collected at 0-15cm depth. At agricultural locations (BA, BC, SB), soils were collected at 3 depths: 0-15cm, 15-30cm, and 30-60cm. For more information, see the field notes from each day. 2018-08-27 -Sherman Barn: The water table was around 50-60cm. -Bouldin Corn: Transects starting from the first corn rows running parallel away from the tower. Dry peat layer around 60 cm. -Bouldin Alfalfa: Transects starting roughly 5m from the tower. A smaller subsample was taken for microbial analysis. -East End: Transects starting 5-10m from the tower, going west/southwest through dense veg with the T2P4 and T2P5 taken from veg near the open water section. A smaller subsample was taken for microbial analysis. -East Pond: Transects starting about 7m from tower to the west (T1) and southwest (T2). (i.e. after the big open pond section by the solar panels). A smaller subsample was taken for microbial analysis. T2P5 was taken from the more uniformly vegetated area to the west. Other samples were mostly from fairly open water areas near clusters of veg. 2018-08-28 -Mayberry: Two transects (T1 in veg, T2 near the open water) each going northwest of the tower and took microbial subsamples from each core. -Sherman Wetland: We took two transects (T1 to the north, T2 south) going west from the tower starting where the water was about 20 cm deep and following the low vegetation. |
| 8 | Spectra | BA | 2017-08-23 - Present | Approx. monthly during summer with field visits | Handheld Spectral Reflectance | Spectral typically collected with and Ocean Optics JAZ spectrometer (sn JAZA2903) 400nm-900nm useful spectrum. An incoming reference, dark and reflected sample spectra are collected to generate reflectance spectra. A cosine corrected diffuse head is held by hand at about shoulder height facing up or down. |