The Columbia River Estuaryine Ecosystem Classification is comprised of a hierarchical group of 6 geospatial data sets which characterize the unique ecosystem of the lower Columbia River and estuary. The framework was developed for applications in larger river systems characterized by very long reaches of tidal freshwater (nearly 200 km, in the case of the lower Columbia). The various hierarchical levels describe the hydrologic regimes, as well as the geophysical processes which have formed the unique landscape over geologic time. Three of the six levels are directly applicable to estuarine research, restoration, monitoring, and management in the lower Columbia. In addition to characterizing natural process and functions, the CREEC also includes a detailed layer of various anthropogenic features throughout the floodplain, including levees, dredge material deposits, drainage ditches, transportation features, and other features.
These data can be accessed through the links below: