Most of Bribie Island sits on two aquifers — a deep one below a layer of rock and a shallow one above it. Rainwater soaks into the shallow aquifer and seeps slowly through until it discharges into the sea at the coastline. Some of the rainwater reaches the deep aquifer and then it moves slowly towards the coast. This effectively stops the seawater surrounding the island from soaking into the aquifers.
Most domestic bores on Bribie Island tap the shallow aquifer and therefore have the potential to interfere with the natural ecosystems. Soils on Bribie Island are sandy, they don’t hold moisture well and have low nutrients. The first step gardeners can take to be smart with their bore water is to choose plants and lawn that like sandy soils.
Here are some good ideas to help improve the sandy soil and keep your plants healthy:
- add organic matter like compost to help hold moisture and add nutrients.
- add water-saving crystals to help hold moisture.
Use mulch around your plants to help hold the moisture in the soil.