Tail-water is a term commonly used in engineering and hydrology to refer to the water that accumulates downstream of a structure or object, such as a dam or weir, with the purpose of managing water flow. It signifies the flow of water that has passed through the structure and is released beyond it. This term is particularly significant in hydraulic design and water resource management.
Tail-water is influenced by various factors, primarily the design and operation of the structure upstream. It may be affected by the water level, discharge rate, and characteristics of the inflow. Consequently, tail-water management is vital in ensuring the stability and functionality of hydraulic structures.
The understanding and analysis of tail-water conditions are crucial in many engineering applications. Engineers must evaluate the tail-water level in order to assess the performance of the structure or object, especially in situations where water backflow could compromise its stability or functioning. Precise measurements and calculations are necessary to determine the tail-water elevation accurately.
Additionally, tail-water conditions impact the overall water flow, including its velocity, turbulence, and sediment transport, downstream of the structure. Therefore, tail-water analysis plays a crucial role in hydraulic modeling, flood forecasting, and environmental impact assessments.
Overall, the term tail-water signifies the water accumulations found immediately downstream of hydraulic structures and is vital in various engineering applications, including water resource management and hydraulic design.
The term "tail-water" is derived from the combination of the words "tail" and "water".
The word "tail" refers to the rear or end part of something, often used to describe the hindmost part of an animal or an object. In the context of water, it can refer to the downstream portion of a body of water, such as a river or stream.
The word "water" originates from the Old English word "wæter" and is derived from the Proto-Germanic word "watōr". This term has ancient roots and has been used across various Germanic languages.
Therefore, the combination of these words gives rise to the term "tail-water", which is typically used to describe the water downstream of a dam or other hydraulic structure. It refers to the water that flows from the outlet or spillway of a dam after it has passed through turbines or other devices.