Development of a FluEgg Model for the St. Croix River

Science Center Objects

The USGS partnered with the Minnesota Department of Natural Resources to collect hydraulic and water chemistry data in the lower St. Croix River for development of a model that predicts the probability of successful egg hatching and survival of juvenile invasive carp over a range of water temperature and streamflow conditions.

The St. Croix River is a Wild and Scenic River that contains high-quality assemblages of native mussels in North America, including several threatened and endangered species. Over the last 5 years, captures of invasive bighead carp have raised concerns from natural resource management agencies that invasive carps will establish reproducing populations in the St. Croix River below the dam at St. Croix Falls, Wisconsin. However, agencies lacked the information needed to determine whether conditions in the St. Croix River are favorable for successful spawning of invasive carps. The USGS partnered with the Minnesota Department of Natural Resources to collect data necessary to update an existing HEC-RAS (Hydrologic Engineering Center River Analysis System, U.S. Army Corps of Engineers) model to develop a fluvial egg transport model (FluEgg) that describes the transport, hatching, and survival probabilities of invasive carp eggs in the lower St. Croix River.

FluEgg Theory

FluEgg Theory

ADCP Data Collection Diagram

Acoustic Doppler Current Profile (ADCP) Data Collection Diagram 


FluEgg Model Input

FluEgg model inputs


FluEgg Model Output

FluEgg model outputs

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