Broad Crested Weir Apparatus

The Broad Crested Weir Apparatus is an educational hydraulic laboratory accessory developed for studying open-channel flow over a broad-crested weir under controlled experimental conditions.

A broad-crested weir consists of a raised obstruction with a crest that is sufficiently long in the direction of flow for characteristic flow conditions to develop over its upper surface. It is commonly studied in open-channel hydraulics for understanding flow measurement and water-control structures.

The apparatus is designed for installation in a compatible experimental flume. Water flowing through the channel approaches the weir, rises upstream, and then passes across the broad crest before continuing downstream.

Students can observe changes in water depth and flow velocity as water approaches, crosses, and leaves the crest. This provides a clear visual demonstration of energy conversion and open-channel flow behaviour.

One of the primary experiments is the determination of discharge over the broad-crested weir. The upstream water head can be measured at different flow conditions and related to the corresponding discharge.

Experimental observations can be used to establish the Head vs. Discharge relationship. The resulting characteristic curve helps students understand how discharge changes with the available head over the weir.

The apparatus can also be used for determining the coefficient of discharge by comparing experimentally measured flow with theoretically calculated discharge.

Flow over the broad crest also provides a useful demonstration of changes in flow depth, velocity, and energy conditions associated with open-channel transitions.

The Broad Crested Weir Apparatus provides practical understanding of open-channel flow, weir hydraulics, discharge measurement, upstream head, flow over a broad crest, coefficient of discharge, and water-surface profiles.

Micro Technologies supplies Broad Crested Weir Apparatus and compatible experimental flume accessories for engineering colleges, universities, polytechnic institutes, technical training centres, and hydraulic engineering laboratories.

Features

• Broad-crested weir configuration
• Designed for compatible experimental flumes
• Suitable for open-channel flow experiments
• Enables flow-over-weir observation
• Suitable for discharge measurement
• Upstream water-head measurement
• Head-discharge characteristic studies
• Suitable for coefficient of discharge determination
• Demonstrates changes in flow depth
• Enables observation of water-surface profile
• Compact educational configuration
• Durable construction for repeated laboratory use

Benefits

• Provides practical understanding of broad-crested weir hydraulics
• Demonstrates open-channel flow over a raised crest
• Enables experimental discharge determination
• Helps students analyze head-discharge relationships
• Supports coefficient of discharge calculations
• Provides visual observation of water-depth variations
• Demonstrates changes in velocity and flow conditions
• Connects theoretical hydraulics with practical experiments
• Suitable for civil and hydraulic engineering education

Product Specifications

Experiments Performed

• Study of flow over a broad-crested weir
• Observation of open-channel flow behaviour
• Measurement of upstream water head
• Determination of discharge over the weir
• Study of head versus discharge relationship
• Plotting of Head vs. Discharge characteristics
• Determination of coefficient of discharge
• Comparison of theoretical and experimental discharge
• Observation of water-surface profile
• Study of flow-depth variation over the crest
• Investigation of velocity changes across the weir
• Study of hydraulic behaviour at different flow rates

Applications

• Fluid Mechanics Laboratories
• Hydraulics Laboratories
• Open Channel Flow Laboratories
• Civil Engineering Laboratories
• Hydraulic Engineering Laboratories
• Water Resources Engineering Laboratories
• Irrigation Engineering Laboratories
• Engineering Colleges
• Universities
• Polytechnic Institutes
• Technical Training Centres
• Research Laboratories

FAQs

What is the Broad Crested Weir Apparatus used for?

The apparatus is used to study open-channel flow over a broad-crested weir and investigate discharge, water head, flow depth, and hydraulic characteristics.

What is a broad-crested weir?

A broad-crested weir is an open-channel flow structure with a relatively long horizontal crest over which water passes.

Can discharge be determined using this apparatus?

Yes. Upstream head and flow measurements can be used to determine discharge over the broad-crested weir.

Can Head vs. Discharge characteristics be studied?

Yes. Measurements obtained at different flow conditions can be used to plot a Head vs. Discharge characteristic curve.

Can the coefficient of discharge be determined?

Yes. Experimental and theoretical discharge values can be compared to calculate the coefficient of discharge.

Can the water-surface profile be observed?

Yes. When installed in a suitable transparent experimental flume, changes in the water-surface profile around the weir can be directly observed.

Does the apparatus require an experimental flume?

Yes. It is primarily designed as an accessory for installation in a compatible open-channel experimental flume.

Is it suitable for civil engineering laboratories?

Yes. It is suitable for civil engineering, hydraulics, fluid mechanics, water resources, irrigation engineering, and open-channel flow laboratories.

Why Choose Our Products

• Practical broad-crested weir experiments
• Discharge and upstream-head studies
• Head-discharge characteristic analysis
• Coefficient of discharge determination
• Designed for experimental flume systems
• Easy visual observation of hydraulic behaviour
• Durable laboratory construction
• Customized dimensions available
• Institutional and bulk supply support

Call to Action

Looking for a Broad Crested Weir Apparatus for your experimental flume? Micro Technologies supplies broad-crested weirs, open-channel flow accessories, experimental flumes, and hydraulic laboratory equipment for universities, engineering colleges, polytechnic institutes, technical training centres, and research laboratories. Contact us for compatible sizes, customized configurations, institutional orders, bulk supply, distributor inquiries, government tenders, or a competitive quotation.