The Martuwarra Fitzroy River in Western Australia is a haven for sawfish, the last stronghold of these unique creatures globally. With four of the world's five species calling it home, the river's untamed nature and its ecosystem are crucial for their survival. Sawfish, with their distinctive chainsaw-like snouts, are a marvel of nature, and the river's role as a baseline for their populations is invaluable. However, a recent government proposal to double groundwater extraction from the river has sparked concern among conservationists and communities alike.
The proposed increase from 32GL to 75.7GL has raised red flags, especially regarding the impact on the sawfish population and the overall health of the river ecosystem. Groundwater aquifers play a vital role in sustaining the river's refuges, which are essential for sawfish and other species during dry periods. Martin Pritchard from Environs Kimberley emphasizes the critical nature of these underground water stores, highlighting their importance for sawfish and the broader ecosystem.
The Martuwarra Fitzroy River Council, an alliance of traditional owners, shares this concern. Dr. Anne Poelina, the executive chair, warns that the river is already stressed due to the precious nature of water. She argues that there are too many unknowns, such as the system's connectivity and the potential impact of sea level rise, to allocate groundwater for profit-making activities. Poelina calls for a more cautious approach, suggesting that both communities and the WA Department of Water and Environmental Regulation (DWER) need more time to gather information and ensure the plan's sustainability.
The proposed plan's history is not without precedent. A similar water allocation plan in the Pilbara region failed due to declining groundwater aquifers, which casts doubt on the Kimberley plan's success. Dr. Ryan Vogwill, a hydrogeologist, underscores the importance of groundwater in supporting the river's biodiversity and cultural values during dry periods. He emphasizes the complex interactions between surface water and groundwater aquifers, advocating for more monitoring to better understand the system and assess potential risks.
The draft water plan's requirement for sustainable groundwater use and protection of water-dependent ecosystems is a positive step. However, the lack of response from the DWER regarding the groundwater allocation determination and the need for additional monitoring raises concerns. The future of the Martuwarra Fitzroy River and its sawfish inhabitants hangs in the balance, with the need for careful consideration and a precautionary approach to ensure the river's health and the species' survival.
