Hydrologic Unit Modeling for the United States

The HUMUS project (or Hydrologic Unit Modeling of the United States) is a project that was funded by the Natural Resources Conservation Service to model the non-point source loading from 8-digit hydrologic unit cataloging units. == History == Most of the project activity took place from 1992–1996, and work continues to this day through the Conservation Effects Assessment Program (CEAP. The project was led within NRCS by Clive Walker.

Source: Wikipedia — Hydrologic Unit Modeling for the United States (CC BY-SA 4.0)