I wonder if they could have installed a pvc pipe at the drop to lesson the fall 5:30 instead of going over the edge. Love the outflow pipe with the screw system. What would be the point of intentionally creating the overflow by closing? That rat took of like a bat out of hell 😂
@@user-gq4er4go1r Yeah, you see, engineers of the company building it are very smart and don't know about: 1) pipes can have turns even between manhole shafts 2) drop shafts' life span increases drastically if the bypass you mentioned is installed 3) overflow chambers better have hydraulic-friendly shapes, we are not moving air there 4) gravity does the work and drop shafts are unnecessary - just use cast basalt or other materials that can be used in higher slopes, so you don't have to build drops - and I'm not mentioning lower cost and less operating work... And yes, closing the valve would mean free overflowing 😂
@kanalismus35 agreed. Enjoyed reading your detailed reply. I wonder if you would get introuble for closing 😅 . I tried to post a link to a file that shows different drop structures but youtube removed comment. I will post it on my community page.
@@kanalismus35for 4) When the system is at a high capacity, a main slope might cause this shaft to become a bottleneck and the head backwater effect?. For this drop shaft we can model the velocity as Vf = √ (2gh) so if pipe is up about 1.8 metres, about 6m/s if but if we installed a slope, Vr = √ (2gh x sin (θ)). I used trigonometry to estimate the minimum angle of the imaginary slope in the video.. about 64° , so… 5.6 m/s. 400mm/s ΔV. We’re loosing out.
6:42 this is a tricky one. other than a Q rate limiter, nothing special, probably just to block it up in the hypothetical event of a diversion?- it doesn’t make sense either. They tell everyone to stop flushing or showering when they close this, they go so far to switch off the potable mains temporarily because they’ll keep on infiltrating into the system, giving quiescent flow. the government will drain the entire water table in the country with pumps to close it in some useful way.
great vid !
Tie nové stoky sú vyslovene esteticky krásne. Pripadajú mi ako vnútro magnetickej rezonancie 😀
Encontrou o Mestre Sprinter..
👍🇧🇷
I wonder if they could have installed a pvc pipe at the drop to lesson the fall 5:30 instead of going over the edge. Love the outflow pipe with the screw system. What would be the point of intentionally creating the overflow by closing? That rat took of like a bat out of hell 😂
@@user-gq4er4go1r Yeah, you see, engineers of the company building it are very smart and don't know about:
1) pipes can have turns even between manhole shafts
2) drop shafts' life span increases drastically if the bypass you mentioned is installed
3) overflow chambers better have hydraulic-friendly shapes, we are not moving air there
4) gravity does the work and drop shafts are unnecessary - just use cast basalt or other materials that can be used in higher slopes, so you don't have to build drops - and I'm not mentioning lower cost and less operating work...
And yes, closing the valve would mean free overflowing 😂
@kanalismus35 agreed. Enjoyed reading your detailed reply. I wonder if you would get introuble for closing 😅 . I tried to post a link to a file that shows different drop structures but youtube removed comment. I will post it on my community page.
@@kanalismus35for 4)
When the system is at a high capacity, a main slope might cause this shaft to become a bottleneck and the head backwater effect?. For this drop shaft we can model the velocity as Vf = √ (2gh) so if pipe is up about 1.8 metres, about 6m/s if but if we installed a slope, Vr = √ (2gh x sin (θ)). I used trigonometry to estimate the minimum angle of the imaginary slope in the video.. about 64° , so… 5.6 m/s. 400mm/s ΔV. We’re loosing out.
6:42 this is a tricky one. other than a Q rate limiter, nothing special, probably just to block it up in the hypothetical event of a diversion?- it doesn’t make sense either. They tell everyone to stop flushing or showering when they close this, they go so far to switch off the potable mains temporarily because they’ll keep on infiltrating into the system, giving quiescent flow. the government will drain the entire water table in the country with pumps to close it in some useful way.