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Abstract
This section investigates a proposed space-based application for South Africa: using remote sensing data to identify alien trees located in catchment areas in the Western Cape. The various satellite datasets used for the analysis are discussed and then the identification process is defined. Once a forest of alien trees is identified, calculations are performed to quantify how much water is being lost to these trees. The result of a sample calculation is that a small section of alien forest consumes approximately ten million litres a day, comparable to the amount of fresh water a medium-sized desalination plant can consume.
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