NeRFF
NeRFF map disclaimer
The Nebraska Real-time Flood Forecasting (NeRFF) Map is a tool being provided by the Nebraska Department of Water, Energy, and Environment (DWEE) and the Nebraska Emergency Management Agency, with funding from the Federal Emergency Management Agency and the State of Nebraska. The Map is intended to be used to provide flood hazard data to property owners and emergency managers prior to and during flooding events. The information provided does not supersede the Effective Special Flood Hazard Areas. The map is not intended to be used for the issuance of Floodplain Development Permitting, Insurance Rating, or obtaining Letters of Map Change. DWEE will continue to improve, add data to, and update the Map, therefore the appearance and functionality may change over time. Additionally, the Map utilizes data from many sources and may not perform if those source sites are down.
The following are a list of assumptions made during the modeling process. This is not an inclusive list.
- Levees and levee closure structures were included in the analysis only if they were listed in the US Army Corps of Engineers' National Levee Database (NLD). No levee breach analyses were completed: levees were assumed to perform until overtopped.
- Bridges and culverts were modeled unobstructed: ice Jams and debris collection were not considered.
- Inundation boundaries were only developed for the listed stream: tributaries were not taken into account.
- Lakes, ponds, and lagoons were assumed dry until overtopped.
- The critical facilities layer is draft and subject to change at any time.
The models used to develop the inundation boundaries and depth grids were developed using the best available topographic, land use, and flood insurance study data, as well as best engineering practices at the time of their development. Any change to the topography or land use will impact the accuracy of the inundation boundaries. These are not regulatory models and were developed solely for informational purposes. Any use of these models or modifications beyond that are not recommended, but may be conducted based on the discretion of a licensed professional engineer. The Department of Water, Energy, and Environment makes no claims, representations, and warranties, express or implied, concerning the validity, the reliability, or the accuracy of the data and data products furnished by the Department. The Department of Water, Energy, and Environment assumes no liability for any errors, omissions, or inaccuracies in the information provided regardless of their cause, or for any decision made, action taken, or action not taken in reliance upon the information contained in these models. All models and reports are available from DWEE, upon request.
