100 Year Flood Zone Indiana Map

It means there is a 1 chance you will see a flood like the one on the fema flood map each and every year.

100 year flood zone indiana map. The term 100 year flood is used to describe the recurrence interval of floods. Best available data layer indiana dnr fema s national flood hazard layer official indiana floodplain information portal. I use the term 100 year flood zone daily for elevation certificates loma s and explaining flood maps. Best available data layer indiana dnr fema s national flood hazard layer official indiana floodplain information portal.

These additional floodplain data include more than 18 000 stream miles of zone a quality studies with base flood elevations and floodway included. Sfha are defined as the area that will be inundated by the flood event having a 1 percent chance of being equaled or exceeded in any given year. Moderate hazard yellow moderate hazard flood zones have at least a 0 2 annual chance of flooding to the shown footprint and are commonly referred to as 500 year flood zones. Streamstats for indiana incorporates regression equations for estimating peak flow frequency statistics at the 10 25 50 100 200 and 500 year recurrence intervals equivalent to the 10 4 2 1 0 5 and 0 2 percent annual exceedance probabilities respectively for unregulated streams throughout indiana and equations for estimating bankfull channel dimensions of width mean depth and cross sectional area for non urban wadeable streams in the three largest physiographic.

This page serves as a resource for obtaining the updated floodplain data for use. Infip utilizes fema published floodplain data and floodplain data from various idnr approved resources in order to provide the most available comprehensive coverage of floodplain information for the state of indiana. The main functions of infip enables you to. Sfhas are labeled as zone a zone ao zone ah zones a1 a30 zone ae zone a99 zone ar zone ar ae zone ar ao zone ar a1 a30 zone ar a zone.

The 100 year recurrence interval means that a flood of that magnitude has a one percent chance of occurring in any given year. The 1 percent annual chance flood is also referred to as the base flood or 100 year flood. Fema sometimes shows a 500 year flood on their maps and that is technically the 0 2. In other words the chances that a river will flow as high as the 100 year flood stage this year is 1 in 100.

Since 1 is also 1 out of 100 the term 100 year flood was adopted because that s easier to talk about than rattling off a bunch of statistics. Floodplain data downloads dnr introduction. Flood hazard areas identified on the flood insurance rate map are identified as a special flood hazard area sfha. The indiana floodplain information portal infip is a mapping application that provides floodplain information for waterways to help citizens determine flood risk in an effort to minimize flood damage.

The digital flood insurance rate map dfirm database is derived from flood insurance studies fis previously published flood insurance rate maps firm flood hazard analyses performed in support of the fis s and firm s and new mapping data where available. Select a point of interest i. This database is an interim version of the dfirm database and does not fully meet all dfirm specifications. Statistically each year.