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May 29, 2019 11:30 AM - 1:30 PM

SAME-MSP Post: May Meeting and Presentation

Grumpy’s Bar and Grill
Address: 2801 Snelling Ave, Roseville, MN
May  29th
The Big Sioux River Flood Information System
Presentation Synopsis:

The Big Sioux River Flood Information System: A one-stop web platform to access real-time stream conditions, flood forecasts, visualizations, inundation maps and flood-related data.

The Big Sioux River Basin in eastern South Dakota has experienced repeated flooding in recent years.  In 2014, a major flood in the lower basin revealed shortcomings in understanding and predicting flood-event behavior.  Available data and modeling at the time were not adequate for enabling state and local authorities to respond appropriately to the imminent flood event.  Thankfully, the response to the 2014 event was overly conservative rather than inadequate, but the need for a comprehensive floodmapping system and predictive model was realized.  The State of South Dakota commissioned the development of the Big Sioux River Flood Information System in 2016.

The Big Sioux River Flood Information System is a two-part web platform.  The first part is a public site with access to observed and forecasted stream conditions at over 50 locations throughout the Big Sioux River Basin and a library of 8,500 inundation maps that represent possible flood scenarios for five different communities.  The second part is a site reserved for state and community officials and includes access to real-time flood inundation forecasts.  The system’s core is a basin-wide hydrologic model (HSPF) that is continuously fed with observed and forecasted meteorological data.  When flood events are predicted, the hydrologic output is run through flood inundation models (HEC-RAS 5) for the five communities, then predicted inundation maps are loaded to the web platform.  The Big Sioux River Flood Information System provides the public with an understanding of potential flood risks and gives Flood Response Teams accurate information that is needed to make appropriate decisions during flood events.


Peter Rausch, PE, CFM, Respec Manager of Watershed Management Program

Pete Rausch is the Manager of Respec’s Watershed Management Program, located in Rapid City, SD.  He is a Professional Engineer (PE) and Certified Floodplain Manager (CFM) with master’s and bachelor’s degrees in Civil Engineering from the South Dakota School of Mines & Technology.  Pete’s experience includes watershed management, watershed and river modeling, and flood impact mitigation.  He served as a modeling and technical lead for the Big Sioux River Flood Information System project.

Meeting Location:

Grumpy’s Bar & Grill
2801 Snelling Ave.
Roseville, MN

Luncheon Menu:

A buffet lunch will be available for purchase for $23 with your reservation.


Social time and lunch (if you so desire) will be from 11:30 AM to 12:30 PM.
Post Meeting and Presentation will be from 12:30 PM to 1:30 PM.


RSVPs (with or without lunch) are Required.   Deadline not later than May 15th with your lunch choice or presentation only.  We are using Eventbrite for RSVPs.   Please follow the link to RSVP: