Structural Mitigation of Flooding: 

Often dams, levees, jetties, and the use of temporary sandbags to block or manipulate water direction, are all structural mitigation efforts. Often the state, city, and local community will have a flood mitigation strategy and use of flood drainage sewers and water runoff channels.

Non-Structural Mitigation of Flooding:

The people are the integral part of the non-structural elements of flood prevention. The communities, municipalities, and governments are the key to planning for natural flooding with planning, implementation of policy, stormwater management systems, system maintenance plans, and in depth community planning of codes for buildings and conducting business. Non-structural mitigation is preventing humans from being in bad flood states before we build a community or allow for new structural development.