Margaret River’s Lake Cave has recently experienced a remarkable natural phenomenon as its water level soared to heights unseen in decades. The Capes Foundation, dedicated to preserving and studying the region’s natural wonders, has announced this extraordinary occurrence, inviting visitors to witness the cave’s majestic state and seize a once-in-a-lifetime opportunity.
The surge in water level can be attributed to the Calgardup bush fire that ravaged the area in 2021, scorching vast expanses of vegetation that typically absorb substantial amounts of water from the soil. With a diminished presence of foliage, an increased volume of rainfall has penetrated the limestone ridge, leading to an unprecedented flow of water through the cave and elevating the lake level.
Steve Harrison, Director of the Capes Foundation, shed light on the fascinating process underlying this phenomenon. He explained, “The water in the cave’s lake originates as rainfall on flat ground approximately 1 or 2 kilometers east of here. It then gradually makes its way through the limestone ridge toward the coast, emerging as springs, such as the one at Conto Spring Beach.”
The intense bushfire of 2021 not only decimated the surrounding vegetation but also disrupted the natural water balance. The lush greenery that typically draws up significant amounts of soil water was no longer present, resulting in more water flowing through the limestone, elevating the water table within the porous rock.
The Capes Foundation has meticulously monitored the water levels in Lake Cave for over 15 years through their Lake Cave Hydrology Project. This long-term initiative has recorded the fluctuations in water levels in response to changes in vegetation patterns, providing valuable insights into the interconnected nature of the environment.
While the exact duration of the elevated water levels remains uncertain, the Capes Foundation urges visitors and the community to embrace this rare opportunity to witness the breathtaking spectacle within one of Western Australia’s most captivating caves. With no way to predict when the water levels will return to their previous state, it is crucial to seize the moment and immerse oneself in this remarkable natural wonder.
Written by: Anne Keam
