A navigable aqueduct is a man-made structure that combines the functions of an aqueduct and a navigable waterway. It refers to a type of waterway design that allows boats and vessels to pass over a natural obstruction, such as a river, valley, or another watercourse. The primary purpose of a navigable aqueduct is to transport water efficiently and also to facilitate the navigation of boats between two bodies of water that are at different elevations.
Typically constructed from durable materials such as stone, concrete, or reinforced steel, a navigable aqueduct consists of a channel or trough that holds the water, supported by arches, pillars, or other means to span the distance over which it is built. It often features sluices or gates to control the flow of water and manage the elevation changes along the route.
A navigable aqueduct can be considered a significant engineering feat, as it requires careful planning, surveying, and construction techniques to ensure stability, durability, and functionality. These structures are frequently found in areas where traditional canals or waterways cannot be easily constructed due to the challenging landscape or topography.
Today, many navigable aqueducts serve as historical landmarks, tourist attractions, or practical transportation links. They play a crucial role in connecting different water bodies, allowing for the efficient movement of both water and vessels, and contributing to the development of trade, commerce, and transportation infrastructure.
The word "navigable aqueduct" is derived from two distinct components.
1. Navigable: The term "navigable" comes from the Latin word "navigabilis", which is a derivative of the verb "navigare", meaning "to sail" or "to navigate". "Navigare" is constructed from two words: "navis" meaning "ship" and "agere" meaning "to drive" or "to lead". Therefore, "navigable" signifies the ability to be sailed or navigated upon, typically referring to waterways that are deep and wide enough for boats or ships to pass through.
2. Aqueduct: The word "aqueduct" comes from the Latin term "aquae ductus", where "aqua" means "water", and "ductus" means "a pipe" or "a channel".