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Habitat
A place where the physical and biological elements of ecosystems provide a suitable environment and the food, cover, and space resources needed for plant and animal livelihood.
Headwaters
The uppermost tributaries of a stream or river; often refers to first order streams.
HUC
Hydrologic unit code
Hydrology
The study of the properties, distribution, circulation, and effects of water on the Earth’s surface, soil, and atmosphere.
