We live in a sun-blessed country with an ever-evolving landscape. Sustainable, natural and affordable erosion prevention materials are now more readily available than ever.
However, soil erosion continues to be a major issue in both urban and rural Australia, causing problems in agriculture and catchment management. Understanding the different types of erosion and their triggers can help landowners develop better prevention and revegetation strategies.
Studies show that around half of our continent suffers a medium to high risk of erosion. This makes it one of the most significant environmental challenges facing Australian land managers today.
Broadly speaking, soil erosion can be classified as either wind or water erosion. Each type has distinct characteristics and requires different control approaches depending on your location and land use.
The economic impact of soil erosion extends beyond just lost topsoil. It affects agricultural productivity, water quality, infrastructure stability and ecosystem health across the nation.
Wind erosion typically occurs in arid and semi-arid zones where large amounts of fertile topsoil are carried off by strong gusts and gales. This reduces the organic, productive value of the land and can create dust storms that travel hundreds of kilometres.
The primary cause of wind erosion is lack of surface vegetation. When ground cover is removed through overgrazing, drought or land clearing, the exposed soil becomes vulnerable to wind action.
Key factors that contribute to wind erosion include:
Central and western Australia are particularly susceptible to wind erosion. The combination of low rainfall, sparse vegetation and strong prevailing winds creates ideal conditions for topsoil loss.
Water erosion is a much broader category that affects both high and low rainfall areas. During periods of intense and heavy rainfall, the vulnerability of soil to erosion depends on several key factors.
The main factors influencing water erosion severity include:
Water erosion takes several distinct forms in the Australian landscape. Each type requires specific identification and targeted control measures to prevent ongoing damage.
Sheet erosion occurs when the topsoil layer on hillsides erodes uniformly over time. This renders paddocks less arable and can go unnoticed until significant soil depth has been lost.
Rill erosion develops when small channels start to form as water continually runs down the same path off a hillside. These rills become deeper over time and can evolve into more serious gully erosion if left unchecked.
Gully erosion represents the most severe form of water erosion. Deep channels cut into the landscape, removing vast amounts of topsoil and subsoil while creating drainage problems and limiting land use options.
Scalding happens when erosion exposes the saline or sodic soils underneath the topsoil layer. This leads to plant death and results in a hard, smooth surface that is impermeable to water and unable to support vegetation.
Tunnel erosion occurs beneath the soil surface when water exploits cracks and root channels. The land appears stable from above but collapses when the underground tunnels can no longer support the weight.
Streambank erosion affects waterways when flowing water undercuts and collapses riverbanks. This is particularly problematic in agricultural areas where livestock access points accelerate bank degradation.
All these erosion types have a secondary impact by introducing high levels of sediment into streams, lakes and oceans. This sediment load changes the ecosystem within our waterways and affects aquatic life.
Nutrient-rich topsoil washing into water bodies can trigger algal blooms. These blooms deplete oxygen levels and create dead zones where fish and other aquatic organisms cannot survive.
Sediment also smothers important habitats like coral reefs and seagrass beds. The Great Barrier Reef, for example, faces ongoing challenges from sediment runoff originating from erosion in coastal catchments.
The amount of vegetation cover is a major contributing factor to erosion control. Establishing and maintaining ground cover should be the primary goal for any erosion management strategy.
To increase vegetation on exposed sites and reduce the risk of erosion, natural fibre matting products provide immediate protection while plants establish. These biodegradable materials break down over time as vegetation takes over the protective role.
For gentle to moderate slopes requiring quick vegetation establishment, this 620gsm jute roll protects exposed topsoil while acting as a sort of roll-on mulch that suppresses weeds and reduces evaporation. The tight weave provides excellent coverage for preventing sheet erosion during the critical establishment period.
On steeper slopes or areas with higher erosion risk, the heavier 750gsm jute matting offers increased durability and longer-lasting protection as your revegetation efforts take hold. The extra weight and thickness resist displacement during heavy rainfall events.
Coir matting features an open weave that is excellent for trapping seeds and giving them a secure place to germinate without being washed away. The 400gsm coir option works particularly well on slopes where seed retention is the primary concern, allowing water to penetrate while holding soil and seeds in place.
For streambank stabilisation and gully erosion control, coir logs provide structural support while encouraging vegetation growth. A 300mm diameter coir log offers substantial erosion barrier capacity along waterways and drainage lines where concentrated water flow requires robust protection.
Natural products work by protecting exposed topsoils and creating favourable microclimates for plant establishment. In doing so, they encourage proper vegetation growth, which remains the best long-term barrier against any type of erosion.
The problem of erosion is part and parcel of what makes our wide brown land such a special and challenging place to manage. However, with the right materials and techniques, erosion can be controlled and reversed.
Early intervention is always more cost-effective than waiting until erosion has become severe. Small rills can be addressed with simple revegetation, while gullies may require engineering solutions and significant investment.
Our All Stake Supply consultants can provide simple, safe and cost-effective solutions to tackle any erosion control problems you may be facing. Why not give us a call on 1300 130 123?
