Common Questions about Siphons: Difference between revisions
From ASDSO Dam Safety Toolbox
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#Is the dam small enough and at a low enough elevation so that the use of a [[siphon]] is physically possible? | #Is the dam small enough and at a low enough elevation so that the use of a [[siphon]] is physically possible? | ||
#Will [[abandonment]] of the original outlet works not impact the reservoir's ability to pass the required inflow design storm (dictated by regulatory agencies)? | #Will [[abandonment]] of the original [[Outlet Works|outlet works]] not impact the reservoir's ability to pass the required inflow design storm (dictated by regulatory agencies)? | ||
#Is there an alternate means to passively control reservoir level to prevent overfilling? | #Is there an alternate means to passively control [[Reservoir Level|reservoir level]] to prevent overfilling? | ||
#Can the siphon reasonably be used for emergency drawdown if needed (in combination with pumps in some cases)? | #Can the siphon reasonably be used for emergency drawdown if needed (in combination with pumps in some cases)? | ||
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==References== | ==References== | ||
*[https:// | *[https://damtoolbox.org/images/f/f2/Simple_Steps_to_Siphoning.pdf Simple Steps to Siphoning] | ||
*[https:// | *[https://damtoolbox.org/images/d/d9/Guidelines_for_Use_of_Pumps_and_Siphons_for_Emergency_Reservoir_Drawdown.pdf Guidelines for Use of Pumps and Siphons for Emergency Reservoir Drawdown] | ||
*[https:// | *[https://damtoolbox.org/images/9/9c/Drawdown_System_Selection_Flow_Chart.pdf Drawdown System Selection Flow Chart] | ||
''Note: The content on this page was originally created as part of DamOutletWorks.org (DOWL, 2018). It has subsequently been updated and reformatted as part of the Dam Safety Toolbox.'' | ''Note: The content on this page was originally created as part of DamOutletWorks.org (DOWL, 2018). It has subsequently been updated and reformatted as part of the Dam Safety Toolbox.'' | ||
Revision as of 20:46, 19 June 2023
Can a Siphon Replace an Outlet at My Dam?
The answer to the following 4 key questions must be YES:
- Is the dam small enough and at a low enough elevation so that the use of a siphon is physically possible?
- Will abandonment of the original outlet works not impact the reservoir's ability to pass the required inflow design storm (dictated by regulatory agencies)?
- Is there an alternate means to passively control reservoir level to prevent overfilling?
- Can the siphon reasonably be used for emergency drawdown if needed (in combination with pumps in some cases)?
Other Questions to Consider
- Siphons when regular releases aren't needed
- Siphoning May Not Always Be Possible
- Low Pressure During Siphoning Can Collapse Pipe
- Pump... or Siphon?
- Siphons can pose Reservoir Level Control Challenges.
References
- Simple Steps to Siphoning
- Guidelines for Use of Pumps and Siphons for Emergency Reservoir Drawdown
- Drawdown System Selection Flow Chart
Note: The content on this page was originally created as part of DamOutletWorks.org (DOWL, 2018). It has subsequently been updated and reformatted as part of the Dam Safety Toolbox.