A new system that uses the rainwater from rain can be designed to reduce the likelihood of flooding, but it can also increase the risk of water loss, according to a study by the Australian Institute of Water and Power.
AIPR senior research fellow John White said it was a good idea to consider all the different aspects of a house’s design to help reduce flooding risk, including whether it was made of solid brick or made of a mixture of stone and wood.
“If you have a slab-roofed house, it’s a lot easier to flood than if you have an open plan,” he said.
It is recommended that all major houses have a rainwater catchment area of at least 10 per cent of the ground surface, or 2.5 metres.
However, the Australian Water Supply Association (AWSA) said the new design did not meet the new standard of 10 per per cent.
In the report, AWSA senior water engineer Mark Hutton said the standard of 2.7 metres was not the correct level for rainwater storage in wet conditions, which is about 20 metres below ground.
If the system had been built at a depth of 1.5 meters, it would have required more than 10 per the 2.75 metres recommended, he said, and the system would have needed to be constructed with additional equipment to capture rainwater.
The AWSA recommends a rain catchment of at most 2.8 metres in rain or snow.
The report recommended that a standard of 3 metres be recommended for houses that have at least two water mains.
In the meantime, Mr White said he was working on a study to see if it was possible to use rain water from the rain to reduce flood risk in some homes.
He said a system like this might also be a good way to prevent flooding from occurring in houses built with reinforced concrete.
Mr White said the more the system is used, the better.
What is rain water?
Rain water is a water that falls from the sky and is carried by rain clouds.
It can also be carried by the wind.
Why does it matter?
The water carries a lot of nutrients, including carbon dioxide and phosphorus, which can make a house more habitable.
How to build a rain water catchment systemA rainwater system can also reduce the risk that the house will flood.
A rain catchement system uses a combination of concrete blocks and a membrane that surrounds the rain water to collect rainwater, or a “catchment area”, and store it in a structure that is more than 5 metres above the ground.
The catchment is about 10 per a square metre.
After the house has been built, the water in the catchment should be used to store the rain.AIPr’s Dr White said a good catchment was about 10 to 20 per cent by volume.
An alternative to the catchments is the “seam”, which is a type of concrete or wood structure built on top of the house.
Another option is a “seal” that is a concrete structure built into the ground or inside a house to protect it from rainwater falling.
The aqueduct system is a system of concrete tubes that collect rain water, and transport it to a catchment, where it is stored.
This can reduce the amount of rainwater that falls on the house from the main water source.
What happens if the house gets flooded?
If you build a house with a rain-catching system, you should consider the design before you build it.
Dr White said there was no clear way to tell if a house was safe to build without one, because there were so many variables.
“The most important thing is to make sure the house is a good fit for the water system, and that it is suitable for the building materials,” he told AAP.
Water leaks from the catchement can damage the structure and lead to flooding, which would increase the risks of flood.