Weirs are constructed as an obstruction to flow of water. These are commonly used to measure the volumetric rate of water flow, prevent flooding and make rivers navigable. 1. Types of Weirs based on Shape of the Opening. 2. Types of Weirs based on Shape of the Crest. 3. Types of weirs based on Effect of the sides on the emerging nappe.

Oct 28, 2024 · Rectangular weirs: These weirs have a rectangular opening and are the most common type of weir. They are used in a wide range of applications and are easy to construct. Triangular weirs: These weirs have a triangular opening and are commonly used in …

Weirs can vary in size both horizontally and vertically, with the smallest being only a few centimetres in height whilst the largest may be many metres tall and hundreds of metres long. Some common weir purposes are outlined below.

Jun 26, 2024 · What is a weir? A weir is a structure built across an open channel, such as a river, to control or measure the flow of water. What are the main types of weirs? Weirs are classified based on their shape, including rectangular, triangular (V-notch), and trapezoidal (Cippoletti).

Feb 9, 2024 · A weir is a hydraulic structure commonly used in water management and engineering to control the flow of rivers, streams, or channels. It is designed to alter the water level and regulate the discharge of water by creating a barrier across the watercourse.

Weirs are constructed as an obstruction to flow of water. These are commonly used to measure the volumetric rate of water flow, prevent flooding and make rivers navigable. 1. Types of Weirs based on Shape of the Opening. 2. Types of Weirs based on Shape of the Crest. 3. Types of weirs based on Effect of the sides on the emerging nappe.

Jan 3, 2024 · Explore various types, from rectangular to ogee-shaped weirs, and gain educational insights into flow dynamics. Discover practical applications and interdisciplinary connections in this concise exploration of weir dynamics.

Types of Weirs . The two main types of weirs are: Gravity weir; Non Gravity weir; Gravity weirs: Uplift pressure due to the seepage of water below the floor is resisted by the weight of floor. Its further types are: Vertical drop weir; Masonry or concrete slope weir; Dry stone slope weir; Parabolic weir; Explanation: Vertical drop weir

A weir, also known as a low-head dam is a small overflow-type dam commonly used to raise the level of a river or stream. Weirs have traditionally been used to create mill ponds in such places. Water flows over the top of a weir, although some weirs have sluice gates, which release water at a level below the top of the weir.

The common shapes of weirs are, rectangular, triangular, trapezoidal, composite, parabolic and proportional. The sheet of water which springs free from the crest is called the nappe. If the sheet of water springs free as it leaves the crest, the weir is called a sharp crestel weir.