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Under the Onís-Adams Treaty of 1819 (also called the Transcontinental Treaty and ratified in 1821) the United States and Spain defined the western limits of the Louisiana Purchase and Spain surrendered its claims to the Pacific Northwest. In return, the United States recognized Spanish sovereignty over Texas.
Answer:
The rising and falling of the tides would cause water levels around Jamestown to rise and cause fresh water streams to become brackish.
Explanation:
The rising and falling of the tides is likely to make the fresh water salty. This is because ocean water is salty and the rising and falling of tides will cause the fresh water to mix in the ocean water. in the given case, the event is likely to occur twice daily so it will increase the chances of fresh water streams turning salty.