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Opening a dam’s spillway gates
856,518 views • 1 year ago •via X (Twitter)
10 Comments
market(ing)man1 year ago
Everything reminds me of her….
Tina1 year ago
Be honest, you watch the whole video?
David 10X1 year ago
She is always on my mind
✘ BIG DAVID1 year ago
Awesome.
Ardavan Homayounfar1 year ago
Awesome
Dexter Wright ... New PFP, same attitude1 year ago
Awesome, no more wildfires, right?
Engineers View1 year ago
Opening dam gates after years
Tony Burns, Phys1 year ago
Is that zombie siren really necessary?
Zan Rogan1 year ago
Literal footage of me near my girlfriend
✘ 5IVE1 year ago
Wow
![Over the top (what you see in the video) That road on the very top is the dam’s crest [the highest point of the dam, where the road runs] - 1.78 km long (about 1.1 miles, or 17 football fields laid end to end). Imagine standing at one goalpost and looking across 17 full fields in a row - that’s the length you see. The crest sits at ~645 meters above sea level [the height compared to sea level]. Just below that is the reservoir’s normal full level [the usual maximum water height] at ~640 m - picture a massive lake stretched out behind you, nearly as high as the road itself. In the center of the main dam, the crest crosses a 216-meter bridge over the spillway opening [the structure that lets extra water out safely]. From this video angle, you might not see it clearly - but trust me, the spillway is there. Back to the bridge: it’s about 11.6 meters wide, wide enough for two cars or trucks to pass with space to spare. It rests on five reinforced-concrete piers [thick vertical supports made of concrete and steel]. Those five “openings” under the deck aren’t separate spillways - they’re the bridge supports holding it up. The “middle ramp” under the crest Now, let’s talk about the middle ramp. Picture a wide, stepped ramp running down the face of the dam beneath the bridge - that’s the auxiliary ungated spillway [an extra water-release path without gates], also called the middle spillway. It’s like the dam’s backup path for water when the main spillway is already in use. It only runs when the reservoir is at or near full and incoming water is more than the main spillway can release. Think of it like the overflow lip on a bathtub - it’s dry most of the time, but when the tub fills to the brim, the water flows over this edge. Its design discharge [maximum flow] is ~2,800 m³/s - roughly 1.1 Olympic swimming pools every second (1 pool ≈ 2,500 m³). Imagine an entire Olympic pool tipping over every single second and rushing down those concrete steps. How GERD handles floods You might be wondering - how does the dam actually manage floods? Well, it’s got a layered system [multiple ways to release water safely]: • Main gated spillway (left bank): six giant gates, ~14,500 m³/s capacity - about 5.8 Olympic pools per second pouring out. •Auxiliary ungated spillway (center): runs when the lake is high enough to overflow it. •Emergency spillway (saddle dam): for rare, extreme floods [about a 1,000-year event - the biggest flood expected in that time]. Together, these can pass a Probable Maximum Flood [worst-case possible flood] of about 30,200 m³/s. • Two low-level outlets (main dam): controlled releases [water pipes with gates that can be opened and closed] up to ~830 m³/s - that’s 830,000 one-liter bottles of water each second. Quick comparisons to bring the numbers to life • Crest length (~1.78 km): about a 20-minute walk from one end to the other. • Crest elevation (~645 m): the truck in your video is driving at a height equal to two downtown high-rises stacked above the riverbed. • Main spillway (~14,500 m³/s): enough to fill 6 Olympic pools every second in a major flood. • Auxiliary spillway (~2,800 m³/s): enough to fill 1.1 Olympic pools each second. • Low-level outlets (~830 m³/s): equal to 830,000 bottles of water rushing out every second. That truck isn’t just driving on a road - it’s crossing the crown [topmost part] of one of Africa’s largest dams, built to control floods, store water, and power the future. Above is the two-lane crest, and below, the spillways and outlets wait quietly until it’s time to release the river’s force. #Ethiopia #BlueNile #Hydropower #Engineering #BenishangulGumuz #Spillway #CrestBridge #GERD #RenaissanceDam](https://image.24vids.com/tw-1955559381593964579/amplify_video_thumb/1955559308097118208/img/j7MyLJf0m43eSiHQ.jpg)
