Hydrology

Subsurface Surface
  • Hydrologic Units - Drainage units as classified by the Soil Conservation Service
  • Watershed Boundaries - Watershed boundaries as determined by the U.S. Soil Conservation Service
  • Water Bodies - Water bodies includes lakes, ponds, marshes, swamps, coastal waters, and land subject to inundation
  • Catfish Ponds - Boundaries of catfish ponds identified by the U.S. dept. of agriculture
  • Major Rivers - Approximately 40 major rivers developed for statewide mapping purposes.
  • Mississippi River - Boundaries of the Mississippi River adjacent to the state
  • Perennial Streams - Stream channels that contain water throughout the year except for periods of extreme drought
  • Intermittent Streams - Stream channels that contain water only part of the year
  • Dam Locations - Locations of dams