Floodplain Management 101 Questions and Answers Fully Solved

Floodplain Management 101 Questions and Answers Fully Solved 4 major functions of a floodplain 1. temporarily store flood waters 2. slow down water 3. filter sediments 4. support natural vegetation Coordinating office for NFIP in texas? Texas Water Development Board Prior to _____, flood control consisted mainly of __,___, and ____. 1968 Dams, waterway channeling, levees National Flood Insurance Act of 1968 Congress established NFIP- a nationwide effort to help communities protect against flooding 4 main goals of NFIP? 1. reduce loss of life and property 2. limit flood-related disaster costs 3. make federally-backed flood insurance (purchase was voluntary) 4. begin floodplain mapping :) Flood insurance was made available in ____ with the ____ Act. Flood insurance was made mandatory in SFHA (as a requirement for a loan) in ____. 1968, National flood insuracne act of 1968. 1973, flood disaster protection act of 1973. Flood insurance reform at of 1974 Implemented requirements to strengthen the program The bank (lender) is responsible for determining is a building is in a SFHA and requires insurance and they pay for penalties for noncomplience! Who is responsible for determining is a building requires flood insurance? The LENDER. Flood Disaster Protection Act of 1973 (2 objections) 1. flood insurance is REQUIRED in SFHA as a condition of getting a loan from a regulated lending institution on any renovation of construction 2. ur community wants federal disaster assistance? ya gotta participate in the NFIP!! Disaster Mitigation Act of 2000? communities must have an all hazards mitigation plan prior to 2004 in order to be eligible for hazard mitigation grant program BW-12 reform act of 2012? 1. removes pre-firm rates for non-primary residencies and commercial properties Executive order 11988 (1977 & 2009) 1977 (carter)- fed agencies are REQUIRED to avoid long and short term adverse impacts of floodplains associated with modifying/developing, don't support development at all if there is a practical alternative 2009 (obama)- critical facilities are to be protected up to the 500 yr 2004 Flood insurance act Established two tiers of rep loss 1. Rep loss 2. Severe Rep loss Repetitive loss Properties incur two or more flood losses greater than 1,000each within a 10 yr period severe repetitive loss Properties incur four or more flood losses greater than 5,000 each OR two claims with the total amount exceeding the value of the structure within a 10 yr period 3 key partners in Floodplain management? 1. FEMA-- sets standards, provides flood insurance, disaster assistance, administers mapping 2. State Coordinators Office (TWDB)-- provides training and ordinance review 3. Local Administrators-- adopts ordinances that meet or exceed FEMA standards Floodway The channel and adjacent areas that must be reserved to convey the flow of of the base flood Where are the federal floodplain management standards listed? 44 CFR (code for federal regulations) Part 60 What does 44 CFR give communities the power to do? Federal basis of a communities power to adopt and enforce its ordinance 44 CFR: criteria for land and management use Describe the 5 parts of the regulation staircase (44 CFR 60.3 parts a-e) a. no floodplain map b. floodplain map, no BFEs c. floodplain map with BFEs and FIS d. floodplain map AND floodway, BFEs, FIS e. all of the above plus coastal high hazard areas Requirements for 60.3 (a) communities 1. review ALL proposed construction to determine if its in the floodplain 2. Determine the need for permits from other agencies 3. Determine if the project is REASONABLY SAFE from flooding 4. minimize infiltration of stormwater into water pipes & sewage systems Additional requirements for 60.3 (b) communities 1. permits for development in SFHA 2. require a BFE if development is large enough 3. development elevated at or above BFE; non res structures floodproof to or above BFE 4. notify changes in watercourse 5. manufactured homes must be elevated and anchored Additional requirements for 60.3 (c) communities 1. Residential- Elevate lowest floor of res property to BFE 2. Commercial- elevate or floodproof to BFE (floodproofing must be certified by an engineer) 3. fully enclosed areas can only be used for parking, storage, access and must have openings 4. manufured home in a park- 36" above grade and anchored as a minimum 5. cummulative development must not increase BFE more than 1 ft Additional requirements for 60.3 (d) communities 1. Adopt fema designated floodway 2. prohibit encroachment within the floodway unless study shows NO RISE If there are no BFEs (60.3 b), what sizes of development make it so the developer HAS to acquire BFE data? 50 lots of 5 acres- smaller of the 2 What's included in the no-rise document (60.3 d)? 1. H&H analysis 2. certification from licensed engineer 3. site plan, grading, and structural plans 4. topo map 5. boundary survey Extra requirements for coastal high hazard area? 1. new construction must be landward of high tide 2. cant floodproof or use fill to elevate, only elevate to BFE with piers/columns-- measured from bottom of lowest horizontal member 3. proper anchorage must be certified by an engineer All communities participating in the NFIP must certify that structures built in or near the SFHA are... reasonably safe from flooding Zone B or X (shaded) 500 yr floodplain or shallow area (depths less than 1 ft) or DAs less than 1 sq mile Zone C or X (unshaded) outside the 500 year, but could still have flood risk Zone A approximate 100 yr (no BFEs) Zone AE actual 100 yr (BFEs established) Zone AH Shallow flooding (ponding)-- deported in ELEVATIONS Zone AO mostly SHEET flooding, shallow/ponding, deported in DEPTHS