This data release includes water quality and zooplankton data collected from ponds on Boudin Island in the Sacramento-San Joaquin Delta. Data were collected in the Bouldin East and Bouldin West ponds concurrently with a Delta Smelt Deployment Experiment which involved three cages in each pond with approximately 60 Delta Smelt (Hypomesus transpacificus) in each cage. There were two fish deployments, the first deployment was from 11/21/2022 to 01/04/2023 (~6 weeks) and the second was from 02/02/2023 to 05/03/2023 (~13 weeks). Temperature, dissolved oxygen, turbidity, specific conductance, salinity, chlorophyll, and pH were measured weekly. Water temperature was recorded continuously (15-minute sampling interval). Zooplankton were sampled weekly using a Schindler-Patalas 12L plankton trap with a 200mL Dolphin bucket with 61 micron stainless mesh. Water quality measurements and zooplankton samples were collected at a fixed station approximately 50 m from the cages. Additional discrete water quality measurements and zooplankton samples were collected inside the cages at week 0 and 3 during the first deployment and week 0, 3, and 12 during the second deployment.

This data includes information on water quality, zooplankton, and fish sampled in ponds on delta islands in San Joaquin County, California. The islands include Bacon (North and South ponds), Bouldin (East and West ponds), Holland Tract (Middle, North, and South ponds), and Webb Tract (East, Middle, and North ponds). Discrete water quality parameters were measured bimonthly and continuous temperature was recorded every 15 minutes. Zooplankton were sampled monthly using a Schindler-Patalas 12L plankton trap with a 200mL Dolphin bucket with 61 micron stainless mesh. Fish were sampled once at each pond using beach seines, gill nets, and boat electrofishing gear.

This data includes information on water quality, zooplankton, and fish sampled in ponds on delta islands in San Joaquin County, California. The islands include Bacon (North and South ponds), Bouldin (East and West ponds), Holland Tract (Middle, North, and South ponds), and Webb Tract (East, Middle, and North ponds). Discrete water quality parameters were measured bimonthly and continuous temperature was recorded every 15 minutes. Zooplankton were sampled monthly using a Schindler-Patalas 12L plankton trap with a 200mL Dolphin bucket with 61 micron stainless mesh. Fish were sampled once at each pond using beach seines, gill nets, and boat electrofishing gear.

This data release documents the spatial and temporal variability of nutrients and related water quality parameters at high spatial resolution in the North Delta in the Sacramento-San Joaquin River Delta of California, USA. The data set includes nitrate, ammonium, phosphate, dissolved organic carbon, temperature, conductivity, dissolved oxygen, turbidity, and chlorophyll . Data-collection cruises were conducted under three different environmental/flow conditions in August, September, and October 2018 that coincided with conditions prior to, during, and following a directed flow action or pulse of agricultural return water organized by the California Department of Water Resources and California Natural Resources Agency .

This data release documents the spatial and temporal variability of nutrients and related water quality parameters at high spatial resolution in the North Delta in the Sacramento-San Joaquin River Delta of California, USA. The data set includes nitrate, ammonium, phosphate, dissolved organic carbon, temperature, conductivity, dissolved oxygen, turbidity, and chlorophyll . Data-collection cruises were conducted under three different environmental/flow conditions in August, September, and October 2018 that coincided with conditions prior to, during, and following a directed flow action or pulse of agricultural return water organized by the California Department of Water Resources and California Natural Resources Agency .

Field data for a spatial water quality map, using Yellow Spring Instruments (YSI) EXO2 sondes over a span of 160 minutes in Rodeo Lagoon, CA, on August 16th, 2016. This data release includes all measured environmental parameters included in the analysis.

Field data for a spatial water quality map, using Yellow Spring Instruments (YSI) EXO2 sondes over a span of 160 minutes in Rodeo Lagoon, CA, on August 16th, 2016. This data release includes all measured environmental parameters included in the analysis.

Field data for vertical water quality profiles using Yellow Spring Instruments (YSI) EXO2 sondes during daylight hours in Clear Lake, Lake County, California. This data release includes all measured environmental parameters included in the analysis. First release: April 13, 2019 Revised: October 29, 2019 (version. 2.0) Revised - January 24, 2022 (version 3.0) Revised - May 31, 2024 (version 4.0)

Field data for vertical water quality profiles using Yellow Spring Instruments (YSI) EXO2 sondes during daylight hours in Clear Lake, Lake County, California. This data release includes all measured environmental parameters included in the analysis. First release: April 13, 2019 Revised: October 29, 2019 (version. 2.0) Revised - January 24, 2022 (version 3.0) Revised - May 31, 2024 (version 4.0)

Field data for vertical water quality profiles using Yellow Spring Instruments (YSI) EXO2 sondes during daylight hours in Clear Lake, Lake County, California. This data release includes all measured environmental parameters included in the analysis. First posted: April 23, 2019 Revised: November 2021