Wilderness is generally defined as areas that have not been significantly modified by human activity. A latitudinal band of the surface with similar climatic attributes forms a climate region.
Some nature writers believe wilderness areas are vital for the human spirit and creativity and some Ecologists consider wilderness areas to be an integral part of the Earth’s self-sustaining natural ecosystem. The biological habitat in the immediate vicinity of a stream is called a riparian zone.
The study of streams and waterways in general involves many branches of inter-disciplinary natural science and engineering, including hydrology, fluvial geomorphology, aquatic ecology, fish biology, riparian ecology and others. Some of the more important components are: soil, atmosphere, radiation from the sun, water, and living organisms.