Flood Mapping, Risk MAP Products, & Risk Assessments

FEMA is charged with producing and maintaining the Flood Hazard Information to support the National Flood Insurance Program. FEMA, through the Risk MAP Program, also produces other products to help increase risk awareness and lead to actions that reduce risk across the Nation. The Risk MAP Program seeks to advance actions by working with States, tribes, and local communities to identify potential mitigation actions they can take to reduce risks, delivering products such as risk assessment information to the community to help them better understand and manage their risks.

Please share ideas on making the Flood Mapping development as well as the creation of the other Risk MAP Products more efficient and streamlined including ways to identify and utilize the best available data for every community and have that data available for awareness, risk assessment, and risk management decision making.

Flood Mapping, Risk MAP Products, & Risk Assessments

Erosion Zones

How many erosion are there on FIRM panels across the nation? Sometimes I wonder why there is a provision erosion zones (Zone E) in the CFR, see section 60.5, but they don’t seem to be used. Maybe FEMA should at least start including erosion hazards (but not use Zone E) in their Risk MAP projects.

Submitted by

Voting

4 votes
4 up votes
0 down votes
Active

Flood Mapping, Risk MAP Products, & Risk Assessments

The Floodway Needs to Reflect the True Hazard

The floodway concept seems somewhat archaic and really doesn’t have anything to do with the hazard. The fringe area for one watercourse could be more hazardous in terms of depth and velocity, than the floodway of another watercourse. Maybe we should define the floodway based upon the hazard and use a depth and velocity relationship to identify the most hazardous area.

Submitted by

Voting

3 votes
3 up votes
0 down votes
Active

Flood Mapping, Risk MAP Products, & Risk Assessments

Clear Out the 5-year Floodplain

We need to get insurable buildings out of the 5-year floodplain. Doing so will get rid of the buildings most at risk of flooding, improve conveyance, and might even help to restore some natural & beneficial functions.

Submitted by

Voting

2 votes
2 up votes
0 down votes
Active

Flood Mapping, Risk MAP Products, & Risk Assessments

Probabilistic Floodplains

FEMA should try and develop a way to reduce the sharp divide between in and out of the SFHA. We need to develop some sort of transition zones between the SFHA and Zone X. These transition zones would pay less than the SFHA rate. Maybe they could be set at 70 and 40% of the SFHA rate in order to reflect their probability of flooding.

Submitted by

Voting

2 votes
4 up votes
2 down votes
Active

Flood Mapping, Risk MAP Products, & Risk Assessments

Every State Needs Updated Maps

The required percentage of floodplain delineations meeting should be looked at least at the state level. It isn’t good to have one state at a 10% NVUE level and another state at 90%. It seems like a minimum of 70% of the miles of floodplain every state should be of the highest quality. Also, for every state we should have a goal that at least 80% of the flood insurance policies are located in a detailed zone.

Submitted by

Voting

9 votes
10 up votes
1 down votes
Active

Flood Mapping, Risk MAP Products, & Risk Assessments

Contractor Setup

FEMA needs to stop changing around the setup with their contractors every 5 years or so. It seems to take 2 to 3 years to get the new process up to speed, and just about the time everything seems to be working, we start moving towards a new setup. We seem to end up with mostly the same contractors; we just keep rearranging the deck chairs.

Submitted by

Voting

15 votes
15 up votes
0 down votes
Active

Flood Mapping, Risk MAP Products, & Risk Assessments

Use Floodway Elevations

If a floodway is developed than that is the minimum elevation that should be used for regulatory purposes, LOMAs, and LOMRs. The floodway elevation needs to be more that it currently is.

Submitted by

Voting

3 votes
3 up votes
0 down votes
Active

Flood Mapping, Risk MAP Products, & Risk Assessments

Cross Section Tables

The Floodway Data Table really should be a cross section table. It doesn’t make sense to exclude cross sections from a watercourse that doesn’t have a floodway. These tables should include the discharges used for the modeling. Publishing information for watercourses that don’t have floodways can help when we are trying to determine which hydraulic model is the effective model.

Submitted by

Voting

-1 votes
0 up votes
1 down votes
Active

Flood Mapping, Risk MAP Products, & Risk Assessments

Barnigate Bar Flooding

The fact that the ocean breached the peninsular and flooded the bay should indicate that some of the FEMA guidelines as to height of 1st floor in V and A zones are out of line with the history of the areas adjecent to the bay. At 108 8th Ave SSP a house built on slab NEVER had any water inside the house built in 1951 and now the plot of land is in an A8 area. The breach in Mantelokin(?) was extraordinary and will not ...more »

Submitted by

Voting

1 vote
1 up votes
0 down votes
Active

Flood Mapping, Risk MAP Products, & Risk Assessments

Increased Funding for Unmet Floodplain Mapping Needs

The Map Mod process ended with significant unmet map needs. Studies were conducted using out-of-date hydrology (sometimes 30+ years old) and hundreds of miles of Zone A streams were mapped on USGS topography without BFE's. RiskMAP evolved concentrating on outreach with a minimal mapping effort. The Technical Mapping Advisory Council, identified in BW-12 is badly needed to summarize mapping needs and rekindle, if necessary, ...more »

Submitted by

Voting

75 votes
76 up votes
1 down votes
Active

Flood Mapping, Risk MAP Products, & Risk Assessments

Store Effective Models & Terrain Data at MSC

FEMA needs to follow Maryland and others examples of storing the effective H&H models and terrain data used to create the floodplain boundaries in an easily used extraction system. The current system is chaotic and effective models are often lost at the FEMA library over time. This would allow more cost effective LOMRs and restudies if the original digital model was readily accessible.

Submitted by

Voting

28 votes
28 up votes
0 down votes
Active

Flood Mapping, Risk MAP Products, & Risk Assessments

Investing in Multi-frequency Depth Grids

Multi frequency depth grids can be used in performing many different types of analyses such as Average Annualized Losses and Benefit Cost Analyses that can be instrumental in facilitating community action. Further, they can be used for even risk based analyses, which has been recommended by the National Academy Sciences to FEMA. It would also have great benefit to FEMA’s many disaster programs. FEMA should invest in ...more »

Submitted by

Voting

29 votes
30 up votes
1 down votes
Active