California Waters - Winter 2021 - Vol. I | Issue I
Ecosystem Engineering Impacts of Water Primrose in the Sacramento-San Joaquin Delta
Many non-native fish, invertebrates, and plants have colonized the Delta over the past century. Included among these species is the water primrose (Ludwigia grandiflora ssp. hexapetala and Ludwigia peploides), an aggressive floating aquatic plant native to South and Central America and parts of the US, but invasive in California.
Scientists Study Selenium Hazard in the Salton Sea Environment
In the past decade, Salton Sea water elevation has declined due to drought, lining of canals, and changes to management of the Colorado River. This has resulted in the creation of new wetlands caused by drains and rivers no longer reaching the Salton Sea.
USGS Unveils Mobile Flood Tool for the Nation
The U.S. Geological Survey announced Friday the completion of a new mobile tool that provides real-time information on water levels, weather and flood forecasts all in one place on a computer, smartphone or other mobile device.
Scientists Collect Water Quality Data on Sacramento-San Joaquin Delta
USGS scientists are using different approaches to better understand levels, types, and distribution of nutrients in the Delta.
Evaluation of Groundwater Resources in the Adelaida Area of San Luis Obispo County, California
Stakeholders in San Luis Obispo County are concerned that the increased demand for water use has, and will continue to, affect groundwater levels and availability in the Adelaida area. To address stakeholder concerns, the County of San Luis Obispo Board of Supervisors has asked the USGS to conduct a comprehensive evaluation of groundwater resources of the Adelaida area.
Bay- Delta Water Quality, Nutrient and Phytoplankton Mapping | US Geological Survey
Data visualization tool created for California's Bay-Delta Regional Monitoring Program. This web applicaton visualizes nutrients and phytoplankton spatially and temporally.
Invasive Mussel Species Impacts the Food Web in Lake Mead
In an article for the journal Science of the Total Environment, USGS scientists and others discuss the impact of invasive quagga mussels on the ecosystem of Lake Mead located on the border of Arizona and Nevada.
How Changing Climate Will Impact the Flow of Sediment to the San Francisco Bay‐Delta
The health of the San Francisco Bay‐Delta depends on a sediment supply that has been recently declining due to sediment trapping in upstream reservoirs. Reduced sediment supply increases water clarity in the Bay-Delta, which in turn influences ecological processes and aquatic life.