Final answer:
According to the NFIP regulations, the base flood level is allowed to increase no more than one foot due to obstructions in the flood fringe during floodway analysis.
Step-by-step explanation:
When conducting a floodway analysis per the minimum standards set by the National Flood Insurance Program (NFIP), there is a set tolerance for how much the base flood level can be increased due to obstructions in the flood fringe.
According to NFIP regulations, the development within a floodway must ensure that the base flood level does not increase more than one foot as a result of the proposed project. The flood fringe can be obstructed up until this threshold is reached, as the increase in flood level poses additional risks to properties and lives within the floodplain area.
In a floodway analysis conducted to the minimum National Flood Insurance Program (NFIP) standard, the fringe can be obstructed until the base flood level is increased by 1 foot. The floodway is a designated area where development is restricted to allow for the unimpeded flow of floodwaters, and the fringe is the outer boundary of the floodplain.
By permitting obstruction in the fringe until the base flood level is elevated by 1 foot, this standard balances the need for flood hazard mitigation with reasonable land use. It aims to safeguard communities from flood risks while allowing limited development in specific areas.