Trees and Their Role in Minimising Storm Water in Brisbane and Beyond.

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How trees prevent flooding

Trees are Important for Stormwater Run-Off

The benefits of trees are widely known; they help the environment by cleaning the air and providing habitat for wildlife, improve physical and mental health, increase community, boost the economy, and even reduce crime rates.  A major advantage of planting plenty of trees in an urban environment is that they decrease the amount of stormwater runoff and therefore reduce the number of pollutants that reach local waters.  Trees should be a major consideration in stormwater management systems during the planning of urban landscape and more trees should be planted in urban areas to ease pressure on existing stormwater systems



parks and stormwater Brisbane



Problems Caused by Lack of Green Landscape

Water runoff generated by storms can be substantial and in tropical climates such as Queensland, proper management of stormwater is essential.  In urban areas especially where a concrete jungle has often replaced the natural habitat and where large amounts of tree cover have been lost, flooding can be a risk due to there being nowhere for stormwater to be absorbed by vegetation and soil. There are innumerable problems which can occur and can be attributed to lack of tree cover and general green landscape.

  • Sewage systems can become overwhelmed with untreated sewage entering waterways.
  • Harmful pollutants such as oils, heavy metal particles and other substances are washed away into local water supplies.
  • Local wildlife and fish are badly affected by the pollution,
  • Our drinking water becomes more expensive
  • More water in our rivers mean more erosion
  • Without trees to slow down the flow of water, it rushes into gutters. The compacted grass lawns and fewer trees in gardens that help soak up the excess runoff causes it to flow out across pavements, down driveways and streets.


Average Rainfall in Queensland.

The average rainfall in tropical Queensland is quite high but according to the Queensland government:’ Queensland’s rainfall is highly variable, making long-term trends difficult to detect. The Bureau of Meteorology uses a 30-year period (1961 to 1990) to characterise the rainfall and climate of a region. In terms of characterising average rainfall, the 1961 to 1990 period is generally indicative of the full rainfall record with the average annual rainfall across Queensland being 623mm which compares quite closely to the average (616mm) calculated over the full extent of the Bureau of Meteorology’s high-quality rainfall data (1900 to 2015).’


benefits of trees


The Benefits of Trees in Decreasing Stormwater Runoff

  • The stormwater is captured by the tree’s canopy and the water is later released into the atmosphere.
  • Tree roots and leaves create soil conditions that encourage rainwater to infiltrate into the soil. The roots take up quantities of water that would otherwise have been part of the excess runoff.
  • Pollutants are and nutrients from soils and water are taken by the trees through their roots. The trees then transform pollutants into less harmful substances.
  • Planting trees near homes and businesses have an economic benefit for the owner. As well as reducing stormwater runoff, the canopy provides shade, lowers air conditioning and heating costs while also increasing resale values.


For Expert Tree Knowledge Always Hire a Professional Tree Company

For all your Tree Care needs and to speak to a Level 5 Qualified Consulting Arborist, call Heritage Tree Care on 0737155444 or email for a free, no-obligation quote and our qualified and experienced Arborists will be delighted to advise you on the best course of action for your trees.  We cover Brisbane, Logan, Ipswich, Redlands, Moreton Bay, Toowoomba and Gold Coast area in South East Queensland, Australia.