CFS Technology & Digital Tools 3

Question 1

A floodplain surveyor wants to assess changes in channel morphology over a 10-year period. Which remote sensing approach is most appropriate?

Accepted Answer

Multi-temporal satellite imagery analysis

Answer

Comparing satellite or aerial imagery from different dates (multi-temporal analysis) reveals planform channel changes, bank migration, and sediment deposition over time.

Question 2

In the context of Elevation Certificates, eBFE stands for:

Accepted Answer

Estimated Base Flood Elevation

Answer

eBFE refers to the Estimated Base Flood Elevation, used when a site-specific BFE has not been formally established through a FIRM study.

Question 3

Which coordinate reference system is mandatory for all FEMA National Flood Hazard Layer (NFHL) data submissions?

Accepted Answer

NAD 83 geographic or state plane coordinates

Answer

FEMA requires NFHL data to be referenced to NAD 83, using geographic or state plane coordinates depending on the delivery specification.

Question 4

Bathymetric LiDAR differs from topographic LiDAR in that it uses:

Accepted Answer

Green (532 nm) laser pulses that penetrate shallow water

Answer

Bathymetric LiDAR uses a green-wavelength laser (~532 nm) that can penetrate clear, shallow water to map underwater topography.

Question 5

When a surveyor submits a Letter of Map Amendment (LOMA) digitally through FEMA's eLOMA tool, the key advantage over paper submissions is:

Accepted Answer

Faster processing with near-instant preliminary determinations for qualifying properties

Answer

FEMA's eLOMA tool provides near-instant preliminary LOMA determinations for simple cases, dramatically reducing processing time compared to paper submissions.

(CFS) Certified Floodplain Surveyor Practice Test

(CFS) Certified Floodplain Surveyor Practice Test

CFS Technology & Digital Tools 3