Riparian Corridoor

Stream riparian corridors run along the length of the stream and form the interface between land and water ecosystems. Riparian planting filters run-off from adjacent land uses, stabilises the bank and prevents erosion through root binding of the soil. The buffer effect of riparian vegetation acts like sponge by absorbing and retaining water, helping to protect the land from flood damage. Riparian planting helps to form aquatic ecosystems by creating habitat and regulating light, oxygen levels and temperature of the water. This in turn creates ecological connectivity along the stream and between habitats. Stream Margin Stream margin planting occurs along the edges of the stream channel and is typically composed of grass-like sedges up to one meter tall. This area of the stream is particularly vulnerable to erosion and planting in this area should aim to provide bank stabilisation, regulate stream temperatures and be able to lie flat and manoeuvre when inundated by flood waters.

Stream Bank (Lower) The stream bank sits adjacent to the stream margin planting and has very similar characteristics and functional requirements. This area is flat and is typically wet and boggy over winter and dry in summer. The plant selection for this area will accommodate high moisture levels during winter and flooding events as well as coping with periods of drought over the summer months. The species must be able to manoeuvre with and not restrict water during flooding events. Stream Bank (Upper) The upper stream bank has a similar planting selection with the addition of shrubs to bind the soil for bank stabilisation. Groundcovers are added to absorb and filter nutrient and sediment run-off. Riparian Trees + Shrubs (Upper Terrace) Riparian trees and shrubs are located on upper terraces as well as within the upper stream bank. Riparian trees and shrubs provide structure, frame adjacent spaces, provide habitat for birds and insects and help to regulate the temperature of the water by shading the stream. Trees and shrubs help to stabilise bankside and prevent erosion as well as absorb excess water through deep root penetration into the soil. The species selected are hardy and tolerant of damp soils and flooding events. The planting will also provide clear zones and unobstructed sight lines and view shafts, enhancing public safety