Israel faces a significant challenge in disabling Hamas’ Gaza tunnel networks, which are used for terrorist operations. A proposed solution is to flood these tunnels with seawater, reducing both Israeli military and Gazan civilian casualties and rendering the tunnels inoperable.
  

Key Points: 

1. The suggested strategy exploits Gaza’s geographical proximity to the Mediterranean to flood tunnels, forcing enemy combatants to the surface.
2. Past examples, such as Egypt’s successful flooding of cross-border tunnels, demonstrate the feasibility of this approach.
3. Implementing the flooding technique would likely incur minimal infrastructure damage and could be done at varying rates, with the potential to render tunnels unusable even before they are completely filled.
4. While concerns about groundwater salinization exist, the current state of Gaza’s groundwater, already heavily contaminated, indicates that flooding may not significantly worsen the situation.
5. The long-term strategic benefit of this method would be to deny Hamas the use of these tunnels, aligning with broader peace and security objectives.

Source: https://www.realcleardefense.com/articles/2023/11/01/flood_the_gaza_tunnels_989879.html