Huc hydrology

1. What is a HUC in hydrology?
2. What does HUC tell you?
3. How do you calculate Huc?
4. What is the difference between HUC 12 and HUC 8?

What is a HUC in hydrology?

A Hydrologic Unit Code (HUC) is a unique code, consisting of two to eight digits, used to identify watersheds based on the United States Geological Survey's four-level classification system.

What does HUC tell you?

So what's a HUC, again? HUC stands for the Hydrologic Unit Code of a watershed (or part of a watershed) in the national Watershed Boundary Dataset. The number of digits in the code indicates the scale of the hydrologic unit.

How do you calculate Huc?

To identify your school or site's Hydrological Unit Code (HUC) designation, navigate to the USGS National Map (https://viewer.nationalmap.gov/advanced-viewer/). This map will allow you to zoom in on your sub-watershed to find your 12-digit HUC.

What is the difference between HUC 12 and HUC 8?

HUC 8 maps the subbasin level, analogous to medium-sized river basins (about 2200 nationwide, pictured in red in the image); and HUC 12 is a more local sub-watershed level that captures tributary systems (about 90,000 nationwide used by EnviroAtlas to display national metrics for the conterminous U.S.).