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What is the measure of two intersecting perpendicular line?
If you are asking for slope, the slope of one line is m, the slope of the other is -1/m. For example, if the slope for one line is 5, the slope of the other line is -1/5 = -0.2 . (Math Open Reference)
What is cippoletti weir?
A Cippoletti weir is a type of flow measurement structure used in open channel flow systems. It consists of a V-shaped notch or opening in a wall or plate placed in the flow path. The flow rate is determined by measuring the water level above the notch and applying a specific equation or formula. Cippoletti weirs are commonly used in wastewater treatment plants and irrigation systems.
What letters or numbers appear on a red cone shaped buoy?
These cone-shaped buoys are always marked with red markings and even numbers. They mark the edge of the channel on your starboard (right) side when entering from the open sea or heading upstream.
Why is 4 - 20 mA range is used in measuring instruments?
It's a convenient standard for bridge circuits. Also, it allows the instrumentation mechanic to know if a sensor circuit is open, because that channel will read 0ma instead of the lower limit of 4ma.
What are the assumptions for deriving Manning's equation for open channel flows?
Jarret and Trieste (1987) outline a few assumptions but the basic one is 'uniform flow'. Meaning the flow does not vary throughout the water body. Other ideas are that n might not be valid over slopes with 0.04m/m gradients because shear stress from the channel will no longer be the dominant source of resistance. Read Stream Hydrology: an introduction for ecologists, some pages available online
