Project Status: modeling is complete
Mouse-over to view tributary flow.
Land use within the basin is predominantly agricultural, but contains several small villages. Watershed soils are mainly loams and loamy sand near the lakeshore and contain more clay further inland. The Sebewaing River is heavily channelized and tile-drained for agricultural purposes. It is believed that agricultural ditch maintenance over time may have led to steep banks, causing instability and bank erosion. Sources of sediment include erosion from agricultural fields and drains as well as from ice damage to the river banks during the spring thaw.
Dredging occurs in Sebewaing Harbor for navigation purposes and to avoid flooding in commercial and residential areas near the harbor. On average, 14,700 cubic yards of sediment have been dredged from the harbor each year from 1966 to 1996. Two nearby confined disposal facilities (CDFs) have been filled with this material, making the storage of future dredge spoils an issue for the watershed.
In addition, a custom-designed
Channel Stability Tool (CST) was also developed for
the watershed. The CST is an easy to use, GIS-based interface
Modeling for the Sebewaing River project was completed in October 2007, along with a training workshop for state and local partners to learn to utilize the modeling tool for various planning scenarios.
Use and Applications
The Channel Stability Tool (CST) gives stakeholders the capability to analyze and choose the best fit ditch management practices. This tool shows the potential consequences, such as erosion or sedimentation, of various ditch management practices, while accounting for gravitational forces, stream bank cohesive forces and root tensile strength of individual plant species. Together, the parts of this tributary model will allow stakeholders to manage and protect the Sebewaing River and watershed.
Tuscola County Soil & Water Conservation DistrictFor more information - or to obtain digital data for advanced modeling purposes - contact:
James P. Selegean, P.E., Ph.D.