This project covers the development of an automated flood warning system that uses real-time rainfall data to predict stream flows and potential flood risk. The system efficiently disseminates information to emergency responders and the public using the web, text, automated calls and other technologies, allowing more time to activate flood-fighting measures and reduce flood damage.
This past rainy season was another excellent year for testing the system. The modeling software is running better than the previous year as a result of additional adjustments made to optimize and improve simulation run time and efficiency to add more forecast predictions. The current system has 5 general locations: Upper Guadalupe River (which includes Ross Creek and Guadalupe River), West Little Llagas Creek, San Francisquito Creek, Uvas Creek, Upper Penitencia Creek. Additionally, reservoir inflows are included for many Valley Water facilities.
Forecast model parameters for both reservoir inflow and streams are being calibrated with the past several years of data to improve future accuracy. The first data feed from NOAA’s Advanced Quantitative Precipitation Information (AQPI) Project has been connected and is now running operationally in testing. NOAA is working on providing additional feeds, which will ultimately improve rainfall forecasting capabilities.
Updated February 2021
No current documents.
Key Performance Indicator for the Safe, Clean Water Program
Map, install, and maintain gauging stations and computer software on seven flood-prone reaches to generate and disseminate flood warnings.
Enhances interagency response to storm-related emergencies
Improves the accuracy of flood forecasting services
Helps municipalities and neighborhoods lessen flood impacts
Maintains access to technical resources that assist municipalities with floodplain management
Promotes community awareness of flood risks
Implements risk reduction strategies consistent with the Federal Emergency Management Agency's (FEMA) Community Rating System as appropriate
Geographic Area of Benefit
About the Safe, Clean Water and Natural Flood Protection Program
In November 2012 the voters of Santa Clara County overwhelmingly approved Measure B, the Safe, Clean Water and Natural Flood Protection Program, as a countywide special parcel tax for 15 years with a sunset date of June 30, 2028. This Program replaced the Clean, Safe Creeks and Natural Flood Protection Plan, which voters approved in November 2000.
The Safe, Clean Water Program was developed with input from more than 16,000 residents and stakeholders and was created to match the community’s needs and values. The voters of Santa Clara County identified five priorities:
Priority A: Ensure a Safe, Reliable Water Supply
Priority B: Reduce Toxins, Hazards and Contaminants in our Waterways
Priority C: Protect our Water Supply from Earthquakes and Natural Disasters
Priority D: Restore Wildlife Habitat and Provide Open Space
Priority E: Provide Flood Protection to Homes, Businesses, Schools and Highways
Other: Six projects from the Clean, Safe, Creeks Plan have been carried forward into the Safe, Clean Water Program.
Each year, Valley Water prepares a report providing a progress update for each of these Program priorities, along with fiscal year accomplishments.
To ensure transparency and accountability to the voters, the ballot measure also created an Independent Monitoring Committee, appointed by the Santa Clara Valley Water District Board of Directors. The Independent Monitoring Committee annually reviews the Program’s progress to ensure the outcomes are achieved in a cost-efficient manner and reports its findings to the Board.
In addition, the Program requires three independent audits, the first of which was conducted in FY 2017.