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8/21/2019 Intro to Open Channel Hydraulics
http://slidepdf.com/reader/full/intro-to-open-channel-hydraulics 1/16
Open ChannelHydraulics
Dr. SM ShiraziF.JSPS, M.IWA, M.ASCE
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What is Water?
• 2 molecules H + 1 molecule O2
H2
O
• Scientific Name : Dihydrogen Monoxide
•
At ambient temperature, can exist invarious forms
• Pure water is tasteless, odourless, and
colourless
• Liquid state water
• Solid state ice
• Gaseous state water vapour
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H2O
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Water is most dense at 4ºC
Ice
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What is hydraulics?The study of water or other fluids at
rest or in motion, especially with
respect to engineering applicationsExample
Irrigation systems
Water supply systems Groundwater Systems
Marine structures
Flood mitigation systems Power generation (from water)
Water treatment systems etc.
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How has been classified? Hydraulics as
Flow in open channel (rivers, streams
etc.)
Flow in closed channel (Pipe flow)
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Open channel is a conduit in which
water flows with a free or open surface. A channel may be natural (Channel) or
artificial (Canal)
Artificial channel under various
circumstances in practice may be called
as,
Canal
Flume
Chute Drop
Culvert
Tunnel
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Open channel hydraulics Why does the flow in rivers vary from deep
and tranquil to shallow and torrential?
What controls the depth of water in a river?
How are water depth and discharge in astream related?
How does the velocity in a stream change asthe amount of water carried by the streamincreases?
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Course Outcome
1) Identify different types of flows
and determine the flow profile
2) Design economically mostefficient channels and canal
section3) Employ dimensional analysis
and its application in hydraulics4) Analyze the flood propagation
through regular channel
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Course Evaluation
Class Quiz: 5
Mid term Test (1): 5 (5 April 2013)
Mid term Test (2):10 (17 May 2013)
Lab Experiment : 20
Final Exam: 60