What technique is used to redirect the flow of liquid away from a specific area?

The technique used to redirect the flow of liquid away from a specific area is diversion. Diversion involves creating a path that guides the flow of liquids, such as hazardous materials, to a safer location, preventing them from causing further contamination or damage to sensitive areas. This method is particularly important in hazmat situations, where controlling the spread of a spill or leak is essential to protect public safety and the environment.

In contrast, barriers are used to contain materials rather than redirect them; they serve to stop or slow the flow. Containment focuses on holding the hazardous material in one place to prevent its spread, but it does not redirect it. Erosion is a natural process that can alter land forms over time but does not apply as a strategy for managing hazardous materials. Each of these options addresses different aspects of hazard management, but diversion specifically targets the need to influence the trajectory of flowing liquids effectively.