Wetlands are often misunderstood because they do not fit tidy expectations. They may look untidy, change shape with the season, and resist the clear boundaries people prefer in maps and property lines. For that reason, they have sometimes been dismissed as wasteland waiting to be drained or filled. Yet a wetland's apparent disorder is part of its function. It stores water, slows movement, traps sediment, and provides habitat precisely because it is not a rigid surface built for speed.

In heavy rain, water that rushes off hard ground can become destructive downstream. Wetlands help interrupt that rush. They do not make floods vanish, and no serious planner should promise that they do. What they do offer is time. Water spread across a wetland moves more slowly than water forced through a narrow route, and that slowing can reduce pressure on surrounding systems.

The value of wetlands, then, is not only ecological in the narrow sense of protecting plants and birds, though that matters too. It is also civic. To preserve a wetland is to accept that the quickest path for water is not always the wisest one for a community.