The nearly level plain that borders the river and is subject to inundation from the main channel relatively frequently, usually once every two years or more frequently. A flood plain is a depositional landform constructed from the river under current hydro-climatic conditions. Geomorphologic characteristics - refers to the size and shape of the river channel and adjacent flood plain. Geomorphologic characteristics of the Lower Missouri River have changed substantially as a result of navigation structures, bank stabilization, and levees. Habitat rehabilitation projects typically seek to alter geomorphologic characteristics so channels and aquatic habitat are more like those that existed prior to management.
Geomorphology is the study of the shape of the surface of the earth, and the processes that form it.
Hydrologic characteristics refers to timing, duration, and sequence of water discharges in the river. On the Lower Missouri River, hydrologic characteristics are determined by a combination of reservoir release policy and natural meteorological events. Lower Missouri River - The portion of the Missouri River downstream from Gavins Point Dam and Yankton, South Dakota. Macrohabitat a contiguous volumetric region in a river channel that is characterized by similar depth, velocity, and substrate with dimensions on the order of bankfull channel width. Reach - Reaches are defined as a contiguous length of river with one or more repeating sequences of similar channel units, or macrohabitats.