In July 2013, SFEI began continuous water quality monitoring for a number of nutrient-related parameters in San Francisco Bay, joining an existing network of sensors operated by several programs throughout the Bay and Delta. EnViz, a time-series visualization tool, was designed to facilitate intuitive comparison of continuous data from around the Bay, and across a variety of analytes, to demonstrate the potential for collaborative monitoring across programs. In this initial phase, we included data from SFEI and several USGS programs, but in the future hope to include data from additional programs in the region as well as allow users to download data to promote further investigations of observed trends.
Dumbarton Bridge, Exploratorium at Pier 17 and Mallard Island are a subset of the continuous monitoring stations operated and maintained by the USGS Bay and Delta Flows and Sediment group as part of the CA Water Science Center. All data at these sites are collected using a YSI 6920 multi-parameter sonde. At Dumbarton Bridge and Mallard Island, two sondes are deployed at different locations in the water column. Data (provided by USGS staff directly or downloaded from NWIS) have undergone a provisional amount of review according to USGS protocols. More information...
Delta Cross Channel, Cache Slough and Rio Vista at Decker Island are a subset of the continuous monitoring stations operated and maintained by the USGS Biogeochemistry group as part of the CA Water Science Center. All data at these sites are collected using a YSI EXO2 multi-parameter sonde and a Satlantic SUNAv2 (for nitrate). Data (provided by USGS staff directly or downloaded fromNWIS) have undergone a provisional amount of review according to USGS protocols. More information...
Alviso Slough and Dumbarton Bridge are a subset of the continuous monitoring stations operated and maintained by SFEI as part of the San Francisco Bay Nutrient Management Strategy. All data are collected using a YSI EXO2 multi-parameter sonde. Outliers and periods of sensor fouling/malfunction are omitted from this site. For more information, contact David Senn ([email protected]).
Prisoner's Point, Martinez, Mossdale and Mallard Island are a subset of the continuous monitoring stations operated by the CA Department of Water Resources. All data are collected with a YSI 6600 multi-parameter sonde. Data were downloaded from the California Data Exchange Center and should be considered provisional. In order to be consistent with other agencies hosted on EnViz, chlorophyll-a data was converted from ug/L to RFU by dividing by 4 (per YSI recommendations). Access more information about DWR's real-time monitoring program.
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The indications of decreased Bay resilience to high nutrient loads have come to the fore at a time when the availability of resources to continue assessing the Bay’s condition is uncertain. The San Francisco Bay Regional Monitoring Program (RMP) has no independent nutrient‐related monitoring program, but instead contributes approximately 20% of the USGS data collection cost. Thus, there is currently an urgent need to lay the groundwork for a locally‐supported, long‐term monitoring program to provide information that is most needed to support management decisions in the Bay.
Developing a Bay-wide numerical model that can be used by the RMP, the Regional Board, and stakeholders to inform environmental management decisions has been identified as an important need for several initiatives. Modeling is a key element of the Nutrient Strategy, to aid in identifying impairment and feasible control strategies under current and future conditions. In recent years the RMP has also been laying the groundwork for developing contaminant fate and bioaccumulation models for the Bay that can be used to forecast conditions under different management scenarios.