The Big Sioux River Flood Information System (BSRFIS) is the result of a combined effort between state government and private industry to create a product that can be used to predict the impact of flood events in the Big Sioux River Basin.

New hydrologic and hydraulic models that more accurately reflect the hydrology of the Big Sioux River Basin are the foundation of the BSRFIS.

Using model information and LiDAR, thousands of inundation maps have been created and stored in a map library for retrieval on demand by users of the BSRFIS. The model runs include various scenarios that may be encountered during a flood event, such as breaching of levees and debris plugged bridges.

New streamgages have been installed on the Big Sioux River and key tributaries to help monitor real time river stages and predict maximum stages during a flood.

The new modeling and streamgages will help the National Weather Service and state and local officials more accurately predict river stages in a flood event. This flood information system can be used by local, state, and federal entities to evaluate flood conditions and determine appropriate response actions.

In addition to enabling better response to flood events, the outcome of this project will help local governments and their citizens evaluate options for future development and changes in infrastructure.

Please direct questions about the BSRFIS to info@bigsiouxfis.org.