Erosion control on New Zealand walking tracks : A dissertation submitted in partial fulfilment of the requirements for the degree of Bachelor of Agricultural Science in the University of Canterbury [Lincoln College]

Abstract

The principles, methods and success of erosion control on New Zealand walking tracks are surveyed. Emphasis is placed on the methods and materials suitable for erosion control on tracks in the South Island. Information was gained by: (1) a questionnaire sent to New Zealand Forest Service and Department of Lands and Survey staff, and (2) a census of the erosion control techniques used on five South Island tracks.

The correct erosion control technique for a given situation depends on environmental factors (soil, topography, vegetation, climate), on the intensity of walking track use and on the cost and availability of materials. Techniques in use are track slope, waterbars, culverts, ditches, surfacing, drainage dips, steps, retaining walls, corduroy, rock fill, planting, rafts and boardwalks. Suitable techniques are recommended for three New Zealand walking track environments and for three South Island track classes. Different techniques are needed for routes, tracks and walks, as the intensity of use usually increases. The use of local materials is important for aesthetic and economic reasons.