"Before we talk about credits or canals, you have to understand the enemy: freshwater delivered too fast, too concentrated, straight into a saltwater body. Estuaries die that way."
The Core Problem: Too Much Freshwater, Too Fast
An estuary like the Indian River Lagoon is defined by its salinity gradient — the slow transition from fresh to salt water. That gradient supports seagrass, oysters, juvenile fish, and the entire food web. When canals and ditches shortcut natural sheet flow, they dump large pulses of fresh water directly into the lagoon in hours instead of weeks. Salinity crashes from 25 ppt to 5 ppt overnight, seagrass roots osmotically shock, oysters close and starve, and fish flee. The lagoon is not damaged by fresh water itself — it is damaged by the rate, timing, and concentration of delivery. Every hydrologic restoration in the lagoon's watershed is ultimately trying to slow water down, spread it out, and let it soak through wetlands before it reaches the estuary.
