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General Guidelines for the Hydrologic-Hydraulic Assessment

General Guidelines for the Hydrologic-Hydraulic Assessment of Floodplains in Indiana was created to assist the floodplain management community in establishing base flood elevations and floodway limits and in evaluating projects in accordance with the Indiana Flood Control Act and the National Flood Insurance Program. The guidelines detail methods acceptable to both the Indiana Department of Natural Resources (IDNR) and the Federal Emergency Management Agency (FEMA) with respect to hydrologic and hydraulic modeling and floodplain mapping. Also included in this guide are recommendations on presenting results of a floodplain study and other useful reference material.

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Chapter 1: Introduction
Chapter 2: Obtaining a Floodplain Determination for a Minor Site Assessment
Chapter 2.5: Non-modeling Assessment Approaches Used by the IDNR
Chapter 3: Overview of the Process for Performing a Detailed Floodplain Analysis
Chapter 4: Mapping Standards and Methods
Chapter 5: Surveying Standards and Methods
Chapter 6: Researching and Evaluating Existing Models
Chapter 7: Guidelines for determining peak discharges
Chapter 8: Guidelines for Hydraulic Modeling Using HEC-RAS
Chapter 9: Guidelines for Alternate Hydraulic Models
Chapter 10: Presentation of Modeling Results


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