THE NUSA DUA
Waterblow Walkway New Natural Attraction
The jagged limestone crags of Nusa Dua’s southeastern peninsula have a new feature. Located above pounding Indian Ocean waves that surge 30 meters high in places, a boardwalk pathway provides safety from powerful sprays generated through a naturally formed blowhole. Depending on the swell, visitors can experience anything from a refreshing mist to a total drenching.
Integrated Resort Complex
Built in the 1970s, the Nusa Dua resort enclave continues to add facilities and refine experiences, keeping the destination fresh and inviting for new and repeat visitors. The Peninsula Waterblow is an example of developing the shoreline’s natural features in a sustainable manner.
How Are Blowholes Formed?
According to Science ABC, a blowhole is actually the end product of a long geological process that can take thousands of years, if not longer! At first, the hydraulic action of the waves of the ocean crashing against land causes small fractures in the surface.
The constant movement of waves at the bottom of cliffs (or any solid structure at the shore) eats away at the area around the crack and renders it weak enough to create sea caves at the bottom. As if this wasn’t bad enough for the health of the rock, the movement of waves forces air into these small fissures, which are formed on the surface. As a result, the rock is placed under ever-increasing stress.
Things become even worse during high tides, as more faults in the rock are created, more of the surface is eaten away and more air is forced into these fissures.
Above the land
The rock not only becomes weaker as time passes, but the land above the rock also undergoes geological changes. There is constant and gradual erosion of the upper surface due to various natural processes, such as weathering and chemical dissolution. Therefore, the upper surface is also considerably weakened over a long period of time.
The strength of a rock diminishes at two vital points; its top and its bottom. When both the parts are unable to endure the pressure of the trapped air below and the constant attack of the sea, part of the rock crumbles. When the conditions are ripe, i.e., when there is a high tide or a rough storm, jets of water abruptly erupt out of the newly formed hole at enormous pressures. Some of these water jets can shoot up as high as 30 metres.
Some Known Sites of Blowholes
There are a few identified sites around the world that are notorious for their famous blowholes. These include Tiarei in Tahiti, Wupatki in Arizona (USA), Hālona Blowhole in Hawaii, Trevone in Cornwall (UK), Punta Banda Peninsula in Mexico, and Kiama in New South Wales (Australia).
Frontiers reporting with sources Australian Geographic; Science ABC