A Hydraulic Jump In Rectangular Channel Calculator is a digital tool used by civil and environmental engineers to analyze how fast-moving water violently transitions into a slower, deeper flow. This phenomenon occurs when a shallow, high-velocity supercritical flow transitions into a deep, low-velocity subcritical flow, creating a turbulent standing wave that rapidly dissipates kinetic energy.
Calculators like the LMNO Engineering Hydraulic Jump Calculator or the Omni Hydraulic Jump Calculator solve complex momentum and conservation equations to predict water depths and energy loss. Core Mechanics & Inputs
To use a hydraulic jump calculator, you typically input a specific combination of variables depending on what data you already have:
Flow Rate (Q): The volume of water passing through the channel per second.
Channel Width (B): The bottom width of the rectangular cross-section.
Upstream Depth (y₁): The initial, shallow depth of the fast-moving water.
Upstream Velocity (V₁): The speed of the water before it hits the jump. Primary Outputs & Equations
The calculator processes your inputs using fundamental open-channel hydraulics equations to output four critical parameters: 1. Upstream Froude Number (Fr₁) Hydraulic Jump Calculator – LMNO Engineering
A hydraulic jump occurs when the upstream flow is supercritical (F>1). To have a jump, there must be a flow impediment downstream. LMNO Engineering Hydraulic Jump Calculator