water resources serter

water resources serter - per unit weight of water measured...

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Question 3 (20%): a) Cite the conditions which when any of them are found, the flow would be critical. b) Define terms of specific energy, specific energy diagram and alternate depths. Show them on graph. a) 1. The Froude number is equal to unity. 2. The depth of flow is equal to critical depth. 3. The velocity of flow is equal to critical velocity. 4. The bed slope is equal to critical slope. 5. The discharge is maximum for constant specific energy. 6. The specific energy is minimum for constant discharge. 7. The specific force is minimum for constant discharge b) At a certain section in an open channel, the specific energy, E, is defined as the energy
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Unformatted text preview: per unit weight of water measured from the channel bottom as a datum. It has dimension of length. E=y+V 2 /2g The specific energy diagram is a graphical representation for variation of the specific energy with the depth of flow in a given section. E= E s + E k E s =y E k =V 2 /2g Alternate depths are two depths with the same specific energy and conveying the same discharge. The same flow can be transmitted, in a given channel section, with the same specific energy either by y 1 or y 2....
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water resources serter - per unit weight of water measured...

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