![]() Droughts can make the problem worse by decreasing the fresh water available to flush salts out of soil and groundwater. Researchers are showing that large storms are becoming more frequent, high tides are reaching farther inland, and saltwater is spreading through fresh groundwater faster than it has in past decades. This rate is also speeding up, causing the problem of saltwater intrusion to get worse over time. In the Northeast, the average rate of sea level rise is 3 mm per year, and faster in the mid-Atlantic where land is also sinking. It also occurs when saltwater infiltrates freshwater aquifers and raises the groundwater table below the soil surface. Known as saltwater intrusion, this occurs when storm surges or high tides overtop areas low in elevation. As sea levels rise along the coasts, saltwater can move onto the land. ![]()
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