Zumbro & Friends
FLOOD MITIGATION PROJECT
Diane Wiley (firstname.lastname@example.org), Water Resources Center, MSM
Dr. Stephen Druschel (email@example.com) Dept. of Mechanical and Civil Engineering, MSM
John Homme (firstname.lastname@example.org) Chairman, Zumbro & Friends
Zumbro & Friends
Funding Provided By: Minnesota State Legislature
Project Duration: 2012-2013
Flood Mitigation Study
Zumbro River Watershed, Minnesota
Flood mitigation of the Zumbro River was studied by students and faculty of Minnesota State University, Mankato, in response to effects of the September 2010 flood event. A topographic surface model of the watershed was built using State of Minnesota remote sensing data obtained for four counties for approximately 150 river miles. A hydraulic corridor was defined for the river by cutting river cross sections at 2765 locations. Bridges and other river crossings were field measured and river geometry verified. Rainfall events and storm water runoff were incorporated into the hydraulic model as inflow, developed from a review of Doppler radar observations, probabilistic characterization of precipitation, and a probabilistic river flow database.
Anecdotal measurements of flood levels and timings were recorded via public outreach and commentary as well as public records. A river flow model was created using the widely-accepted US Army Corps of Engineers software HEC-RAS, which allows prediction of flood levels depending upon rainfall and runoff conditions. However, calibration of the model was not accomplished at this time due to limitations of time and budget after receiving the public input.
Six public meetings were used to explore flood mitigation strategies and specific measures of: (1) infiltration and impoundments; (2) walls and levee structures; (3) do nothing and accept the risk; and (4) relocation and repurposing land.
The river flow model is made freely available to both government agencies and non-governmental organizations as well as the Zumbro watershed citizenry to help the people of the Zumbro watershed consider responses to past flood events and build protection from future flood events.
Final Report, Zumbro Watershed Flood Mitigation Study (pdf)
Appendix F (Not Available At This Time)
Zumbro & Friends Project Early Reports
Summary: Southeastern Minnesota flooding is costing local communities, the state and federal government millions of dollars. These floods have wrought devastation upon the lives of the people in these rural communities who are our neighbors and a vital part of the fabric of Minnesota. At the same time,the floods have been a reset event, which has provided the opportunity to go forward with a new start. The Zumbro Watershed can't be looked upon as an unmanaged problem, but as a tremendous resource to many communities within its boundaries.
Zumbro & Friends was formed in response to the devastating September 2010 Zumbro River flooding. It is a true grassroots organization that is comprised of local citizens that are partnering with three established non-profit organizations-- the Zumbro Watershed Partnership, Coming Alongside, and Renewing the Countryside--- and the academic community to form an Executive Steering Committee. The common goal for this work is the development of a comprehensive Watershed Flood Control and Mitigation Plan.
Zumbro & Friends seeks to foster relationships between the faith community, private sector, local government agencies, regulating and supporting agencies, legislators and the citizens who live in the Zumbro Watershed. By working proactively, across community boundaries and across sectors, Zumbro & Friends hopes to develop a comprehensive, coordinated, multi-county development plan that can be applied to other parts of the state.
Project Documents:Project and Partner Overview
Download "Flood Mitigation Townhall Meetings Dates" 8-23-13.doc
Download "Students to Present Flood Mitigation Findings" 8-23-13.docx
Download "Flood Mitigation Presentation Schedule" 8-23-13.doc
Download "Flood Mitigation Study Update" 7-24-13
Download Zumbro Watershed Flood Mitigation Study Annual Progress Report Dec. 31, 2012
Download 3-Page Summary
Download Phase One Flood Mitigation Report