The aging process by which lakes are fertilized with nutrients. Natural eutrophication will very gradually change the character of a lake. Cultural eutrophication is the accelerated aging of a lake as a result of human activities. Flow G Geomorphological Characteristics Refers to the size and shape of the river channel and adjacent flood plain. 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.
Ground Water Underground water in an aquifer, used for drinking water in 75 percent of Minnesota households. The subsurface water supply in the saturated zone below the level of the water table. H Heavy Metals Metals with high molecular weights that are of concern because they are generally toxic to animal life and human health if naturally occurring concentrations are exceeded. Examples include, arsenic, chromium, lead and mercury. Herbicides Chemicals used to kill undesirable vegetation.