Flood plain zoning divides flood-prone areas into zones to restrict development based on flood risk. It aims to protect life and property by limiting construction in the most frequently flooded prohibitive zone, directing development in the less frequent restrictive zone, and demarcating rare flooding in the warning zone. Flood plain zoning is a non-structural flood mitigation measure that reduces flooding risks and impacts by restricting encroachment and directing development to be less susceptible to damage.

1. Civil Engineering Department
Subject : Hydrology & Water
Resources Engineering
Topic : Flood Plain Zoning
Name : Zala surpalsinh. I
Enroll No : 150600106063

2. what is flood plain ?
→ The flood plain is the land which has been or
may be covered by floodwater during a regional
flood - which is a flood that has a 1% chance of
occurring in any given year.
Why floodplain zoning ?
→ floodplain zoning is designed to protect life,
health and property.

3. FLOOD PLAIN ZONING
• Flood plain zoning means
dividing the entire flood area
into different zones and to
restrict the occupancy of the
different zones of the flood
plain to uses which will suffer
little or no damage during
floods.
• It is non - structural flood
mitigation measure.

5. Objectives of flood plain zoning
• To restrict the encroachment of the zone which
frequently comes under the influence of flood.
• To direct selected activities in the zone which
come under the influence of the flood less
frequently in such manner that they are
susceptible to flood damage.
• To demarcate the zones which are subjected to
flood only on rare occasions.

6. • The flood zones are usually classified as follows :
• Prohibitive zone
• Restrictive zone
• warning zone

7. ADVANTAGES DISADVANTAGES
1. The risk of flooding is reduced 1. The expansion of an urban area is
limited if there are not any other
suitable building sites.
2. The impact of flooding is reduced 2. It's no help in areas that have
already been built on
3. Impermeable surfaces are not
created e.g. Buildings and roads.
4. There are not any houses or roads
to be damaged

8. Thank you