Prioritising quaternary catchments for invasive
alien plant control within the Fynbos and Karoo
biomes of the Western Cape province

Executive Summary


Invasive alien plant control requires the allocation of limited resources to control operations to maximise benefits. The priorities for such allocation are based on a mixture of fact and opinion, interpreted either subjectively or objectively, but often not explicitly so. This project sought to develop an approach that could assist managers and planners in the Working for Water Programme’s Western Cape Region to prioritise their activities with a degree of transparency. We used the Analytic Hierarchy Process (AHP) to facilitate prioritization. AHP is a multiple criteria decision-making tool for setting priorities when both qualitative and quantitative aspects of a decision need to be considered, and for achieving group consensus.