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We developed the Flood Emergency Response Information Exchange (FERIX) to improve flood emergency preparedness, response, and recovery in California. It provides participating agencies an online system to access and exchange current flood information in real-time through Web GIS interface.
- Community Resources
Communities and citizens have to be proactive about flooding...
- Flood Data
We develop and provide real-time tools to assess flood...
- Maintenance
We operate and maintain federally constructed flood control...
- Risk Assessment and Mapping
This work supports non-regulatory approaches in complying...
- Community Resources
- Flood History and Impacts
- Flood Types and Causes
- Flood Risk
- Local Responsibilities
- Federal Responsibilities
- State Responsibilities
- Overview of Physical Flood Management System
- SPFC
- Land Use Policies
- Floodplain Preservation, Expansion, and Restoration
Long History of Floods Across the State. California has experienced destructive flood events throughout its history, as highlighted in Figure 1. While certain flood disasters from the state’s earlier years—such as the “Great Flood” of 1862 and floods along the Los Angeles River in the 1930s—are famous for their large impacts, California has also ex...
Flood Conditions Vary Across State. Figure 2 summarizes the types of floods that occur in California, as well as the geographic regions in which they typically occur.In general, the figure displays the different types in order of frequency of occurrence. As shown, some types of floods—such as coastal or alluvial fan—only occur in certain regions of...
Flood Risk Defined Based on Estimated Flood Likelihood. Flood managers define flood risk as the likelihood of negative consequences or damages occurring from flood inundation. Frequently, flood risk is described based on the calculated probability that a flood will occur in a given area. For example, a “100‑year flood” is estimated to have a 1 in 1...
Local Government Flood Management Arrangements Vary. Statewide, most activities to protect communities from floods are undertaken by local agencies. These activities include establishing and implementing land use policies, constructing and maintaining flood infrastructure such as levees, and emergency preparedness efforts. These activities are carr...
USACE.USACE has built, conducts major repairs on, and holds regulatory authority over certain flood management facilities that were authorized by Congress. The agency, however, typically hands over operations and maintenance to a “nonfederal sponsor” after construction projects are complete. Major flood control projects built in cooperation with US...
DWR. DWR is the state’s lead agency in flood‑related activities. The department’s responsibilities include the full cycle of flood‑related activities, including preparing for future floods, forecasting imminent floods, and responding to actual floods. Besides providing guidance and assistance to local agencies, DWR also maintains certain SPFC levee...
Many Types of Flood Management Facilities Across State.Local, federal, and state agencies have developed a variety of physical structures to convey and control water flows and floodwaters. Such structures include levees and floodwalls, channels, weirs, and culverts. Additionally, flood managers use detention and retention basins, dams and reservoir...
SPFC Provides Flood Protection in Central Valley. The SPFC is a system of flood protection infrastructure along the main stem and certain tributaries of the Sacramento River and the San Joaquin River, as shown in Figure 6. The system includes about 1,600 miles of levees, four dams, five major weirs, seven major drainage pumping plants, and seven by...
Land Use Policies Can Seek to Minimize Potential Damage. A key nonstructural approach to limiting damage from floods is to control the amount and type of development that occurs in flood‑prone areas. For example, jurisdictions might develop land use policies and building codes that discourage construction within floodplains. Other policies might al...
Floodplains Can Help Keep Floodwaters Away From Development.Nonstructural approaches also include preserving and enhancing natural floodplain functions such that undeveloped lands can slow and absorb floodwaters before they reach developed areas. Actions include purchasing easements to preserve lands so they remain available for periodic inundation...
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Oct 25, 2023 · The USGS California Water Science Center maintains nearly 500 streamgages that provides key streamflow and water level data for flood forecasters, the public, and emergency managers at the federal, state, county, and local levels.
Flood monitoring systems offer real-time data and insights into various factors like water levels, velocity, and rainfall, allowing for timely warnings and immediate action. They help authorities, communities, and organizations to make informed decisions, significantly reducing the loss of life and property.
Mar 4, 2019 · USGS Flood Inundation Maps, along with Internet information regarding current stage from the USGS streamgage, provide emergency management personnel and residents with information that is critical for flood-response activities, such as evacuations and road closures, as well as for post-flood recovery efforts.
We develop and provide real-time tools to assess flood conditions and flood control system status. We maintain systems that support flood operations by: Collecting, storing, and managing information so it is accessible to flood managers and the public.
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The Central Valley Flood Protection Plan (CVFPP) is California’s strategic blueprint to improve flood risk management in the Central Valley.
