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The head of navigation is the farthest point above the mouth of a river that can be navigated by ships. [1] Determining the head of navigation can be subjective on many streams, as the point may vary greatly with the size or the draft of the ship being contemplated for navigation and the seasonal water level. On others, it is quite objective ...
Fouling communities are communities of organisms found on artificial surfaces like the sides of docks, marinas, harbors, and boats. Settlement panels made from a variety of substances have been used to monitor settlement patterns and to examine several community processes (e.g., succession, recruitment, predation, competition, and invasion ...
Maritime geography is a collection of terms used by naval military units to loosely define three maritime regions: brown water, green water, and blue water. Definitions [ edit ] The elements of maritime geography are loosely defined and their meanings have changed throughout history.
Topographic profile. A topographic profile or topographic cut or elevation profile is a representation of the relief of the terrain that is obtained by cutting transversely the lines of a topographic map. Each contour line can be defined as a closed line joining relief points at equal height above sea level. [1]
Physiographic region. Physiographic regions are a means of defining Earth 's landforms into distinct, mutually exclusive areas, independent of political boundaries. It is based upon the classic three-tiered approach by Nevin M. Fenneman in 1916, that separates landforms into physiographic divisions, physiographic provinces, and physiographic ...
150 miles (240 km) south of Tijuana, the port is intended to compete with the twin ports of Long Beach and Los Angeles, Once completed the port would serve as the primary dock for Asian vessels unloading shipping containers. and would have a 200-mile (320 km) rail line to San Diego–Tijuana. Airports
The Dymaxion map or Fuller map is a projection of a world map onto the surface of an icosahedron, which can be unfolded and flattened to two dimensions. The flat map is heavily interrupted in order to preserve shapes and sizes. The projection was invented by Buckminster Fuller. The March 1, 1943, edition of Life magazine included a photographic ...
A buffer zone is a neutral zonal area that lies between two or more bodies of land, usually pertaining to countries. Depending on the type of buffer zone, it may serve to separate regions or conjoin them. Common types of buffer zones are demilitarized zones, border zones and certain restrictive easement zones and green belts.