'Calamitous' dive: Russian Nadezhda Bazhina lands on back at Rio Olympics

"Wow. That's calamitous".

That was the less-than-complimentary reaction from a television commentator when Russia's Nadezhda Bazhina spectacularly bombed her dive in the 3-metre springboard preliminary round at the Rio Olympics on Friday night, local time.

As if diving into the green waters of the Maria Lenk Aquatics Centre wasn't grim enough, Bazhina added a solid back-slap to her suffering when she scored solid zeros for her fourth dive of the night.

"Oooooohhhh," the BBC commentator exclaimed, as the 28-year-old hit the water.

"So what happened is Bazhina's landed with basically one foot on the board, the other one has slipped right off the side, and that's killed her take-off. No height.

"Wow. That's calamitous."

A second commentator could be heard laughing, before saying simply: "Oh dear".

It was a huge disappointment for Nadezhda, who failed to advance to the semi-final of the event.

Canada's Jennifer Abel bounced back from her fourth-place finish in the synchronised 3m springboard to place first in the preliminary of the individual event, while the favoured Chinese divers He Zi and Shi Tingmao finished in second and third place.

The colour of the diving pool and the adjacent water polo pool have been the centre of much conjecture in recent days.

Rio 2016 officials cancelled training for the divers on Friday morning for maintenance purposes, but insisted the water was of no danger to the health of the athletes. However, the synchronised swimming might be moved to another venue to protect the eyes of competitors.

FINA - the governing body for water sports - blamed the colour of the water on water treatment problems, after water tanks ran out of some chemicals, causing a decrease in the alkalinity of the pool.

German diver Stephan Feck posted a photo on Facebook showing him beside the diving pool blocking his nose.

"The whole venue smells like somebody has fart [sic] #goodmorning #failed #tollermensch," he wrote.