what is spillway and their types with function
- 2. CONTENTS What is spillway Types of Spillway Purpose/function of spillway
- 3. What is Spillway? Spillway is masonry overflow portion provided every dam . The top of spillway known as crest . It is very important component of a dam .
- 4. Types of spillway 1.Main or services spillway drop spillway Ogee spillway Chute or trough spillway Shaft spillway Siphon spillway Side channel spillway 2. Emergency spillway
- 5. Drop spillway This is simple type of spillway It may be constructed on small bunds on thin arch dams It is low weir and simple vertical fall type of structure
- 6. Ogee spillway It is most common type of spillway provided on gravity dam It is widely used in concrete masonry, arch and buttress dam
- 7. Chute or trough spillway A chute spillway is one which passes the surplus discharge through a steep sloped of a channel is called as chute or trough spillway It is provided on earth and rockfill dams
- 8. Shaft spillway It is kind of funnel type of structure Water drops through a vertical shaft to a horizontal conduit that conveys the water past the dam Also called as glory hole spillway
- 9. Siphon spillway It is based on principle of siphon When water rises over FRL then water start spilling There is an air vent for removing the entrapped pressure from the water
- 10. Side channel spillway It is used when dam is not rigid and it is undesirable to pass flood water over the dam After passing crossing over the spillway rest, water flows parallel to crest
- 11. Function of spillway The quantity of water from upstream to downstream side of the reservoir To control the discharge from reservoir To avoid overtopping of surplus water To protect downstream slope from scouring erosion
- 12. THANK YOU HAVE A NICE DAYS