NASAのインスタグラム(nasa) - 10月30日 07時03分

Please stick to the rivers and lakes that you’re used to! ? ? ?
A satellite image offers a view of the Suwannee River in Georgia that’s known as a “blackwater river” because of its dark-brown waters laden with organic material. Unlike other blackwater rivers, it maintains its inky color along its entire 250-mile journey to the sea.

When the river finally meets the Gulf of Mexico along Florida’s Big Bend—that portion of coast where the state’s panhandle curves to meet its peninsula—its dark waters act like a tracer, revealing whereby the river water mixes with the sea.

To understand the color of the Suwannee River, you have to start at its source. In Georgia’s boggy Okefenokee Swamp, the peat deposits are so extensive that the ground quivers with every step.

It is in this swamp that the nascent Suwannee River first encounters large amounts of decaying vegetation. As these leaves, branches, and bark decay, the tannins that once protected the vegetation dissolve into a substance that dyes the river a brown so dark that it borders on black. The amount of dark dissolved organic matter, or humic substances, in the Suwannee River is nearly ten times higher than other streams around the world.

Our satellite view from the vantage point of space helps us increase our understanding of our home planet, improve lives, and safeguard our future.

Credit: @NASAEarth

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