Forecast-Informed Reservoir Operations (FIRO)
Recognizing the connection between improved weather forecasting and reservoir operations, Yuba Water Agency is implementing forecast-informed reservoir operations at New Bullards Bar Dam to significantly reduce flood risk on the Yuba River. This is now possible because of the recent and marked improvement in the science of weather forecasting. The National Weather Service can now accurately forecast rainfall amounts five days out, allowing water managers to predict flows up to a week in advance of a storm.
How it Works
Implementing forecast-informed reservoir operations reduces flood risk and improves public safety by using weather forecasts to determine the optimal releases for a dam in advance of threatening storms. As an atmospheric river or 'Pineapple Express' storm approaches that is expected to impact the Yuba watershed, operators will determine exactly how much water to release in advance of the storm, while there is capacity in the river channel, thus creating room in the reservoir to store the storm flows.
Currently, dam operators are required to keep the reservoir at a significantly reduced water level during storm seasons, ensuring space to handle possible storms, regardless of the forecast.