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Proportionate perimeter is the ratio of perimeter while running partially full to running full. It represents the relationship between the wetted perimeter under partial flow conditions and the full wetted perimeter of a channel or pipe.
The calculator uses the formula:
Where:
Explanation: This formula calculates the ratio between the wetted perimeter during partial flow conditions and the full wetted perimeter, providing insight into the flow characteristics of partially filled channels or pipes.
Details: Calculating proportionate perimeter is crucial for hydraulic engineering applications, particularly in designing and analyzing open channel flows, drainage systems, and partially filled pipes. It helps in determining flow resistance, velocity distribution, and overall hydraulic efficiency.
Tips: Enter both wetted perimeter values in meters. Ensure that both values are positive numbers greater than zero for accurate calculation.
Q1: What is the range of proportionate perimeter values?
A: Proportionate perimeter values range from 0 to 1, where 0 represents no flow and 1 represents full flow conditions.
Q2: How does proportionate perimeter relate to flow characteristics?
A: The proportionate perimeter affects flow resistance, velocity distribution, and hydraulic radius, which are important parameters in open channel flow calculations.
Q3: Can this calculation be used for circular pipes?
A: Yes, the proportionate perimeter calculation applies to various channel shapes including circular pipes, rectangular channels, and trapezoidal sections.
Q4: What are typical applications of proportionate perimeter?
A: This calculation is used in sewer design, irrigation systems, stormwater management, and any application involving partially filled conduits.
Q5: How accurate is this calculation?
A: The calculation is mathematically precise when accurate input values are provided. The accuracy depends on the precision of the measured wetted perimeter values.