I did a sewer model run and upon validating it, I received the following user notifications:
1. "This node type is invalid as the Suction-side node to a pump. A pump must be a storage element type such as a pond or wet well."
2. "A pump must be connected to a storage element, such as a Pond or Wet Well, using a single pipe."
3. "Pump discharge link is inactive, not selected or doe not exist."
The pump station includes a wet well, 2 pumps, which are connect by pressure pipes and leave the pump station, which is then connected to a node. I tired to include a picture, but it's not working for me. Any insights would be greatly appreciated. Thank you in advance.
<![if !supportLists]>1. <![endif]>Elevation ground
<![if !supportLists]>2. <![endif]>Elevation invert
<![if !supportLists]>3. <![endif]>Elevation base
<![if !supportLists]>4. <![endif]>Elevation initial
<![if !supportLists]>1. <![endif]>Elevation off
<![if !supportLists]>2. <![endif]>Elevation on
<![if !supportLists]>3. <![endif]>Elevation maximum
<![if !supportLists]>4. <![endif]>Elevation minimum
Hello Marie,
I think this relates to wet-well elevations. I am sharing an article which will help you understand the "tank" operating range. See the link below;
Understanding Tank Operating Range
Although the article above has definitions for "tanks" used in water supply systems; I am providing the corresponding definitions in case of "wet-wells" as below;
Elevation (Ground): Ground Elevation based on topography
Elevation (Invert): This must be related to a pressure pipe or conduit. A wet-well would have "Elevation (Minimum)" which corresponds to the lowest allowable water level in the wet-well.
Elevation (Initial): Starting water level of the wet-well
Elevation (Maximum): Maximum allowable water level in the wet-well. This generally corresponds to the top of the wet-well.
Since a wet-well is usually situated underground the elevations would be such;
Elevation (Ground) > Elevation (Maximum) > Elevation (Initial) > Elevation (Minimum) > Elevation (Base).
The Elevation (On) and (Off) pertain to pump "On" and "Off" elevations. These elevations control the pump start and stop routines. When the level of water in the wet-well reaches either of these the pump status would be changed. E.g. if the water level matches the "On" elevation, the pump would start pumping and similarly it would stop pumping when the wet-well level matches the "Off" elevation. See the below article for more clarity on this;
Pump On/Off Elevations vs. Logical Controls vs SWMM Control sets
Let me know if this helps.
Regards,
Yashodhan Joshi