nonnavigability

Nonnavigability refers to the condition of a waterway, such as a river, canal, or strait, where passage by watercraft is impossible or severely restricted. This inability to navigate can stem from a variety of natural or man-made obstacles. Natural causes include shallow depths, strong currents, rapids, waterfalls, extensive shoals, submerged rocks, or the presence of ice. Man-made impediments can involve dams, locks that are inoperable, bridge clearances that are too low, or the accumulation of debris.

The term is often used in contrast to navigability, which signifies a waterway's suitability for travel by boats and ships. The degree of nonnavigability can vary. Some sections of a waterway might be partially navigable, allowing for smaller craft or passage under specific conditions, while others may be completely impassable for any type of vessel. Understanding nonnavigability is crucial for transportation planning, infrastructure development, and ecological assessments. It can also be a factor in legal definitions of waterways and property rights.