percentage change will mask important
corresponding to a numerical scale from 1 to 5,
ecosystem-specific changes (both in time and in
which are then brought together in a simple,
space), which need to be identified for targeted
flexible and robust traffic light scoring system.
action to occur. At the same time, only reporting data disaggregated per ecosystem type will prevent the monitoring of national progress in
FIGURE III.1. MODEL TRAFFIC LIGHT BASIN SCORECARD SYSTEM
achieving the target. Overcoming this issue could involve the implementation of a river basin scorecard system, which would develop a combined subindicator score for ecosystem changes per river basin. Freshwater ecosystem changes per basin could be calculated using a weighted sum of changes in the subindicators, with the extent of change per subindicator Source: DHI GRAS / UNEP FIGURE III.2. MODEL GLOBAL MAP OF THE BASIN SCORECARD SYSTEM
Note: Figures III.1 and III.2 are for illustrative purposes only to show how the basin scorecard system could be developed and used to readily identify at-risk basins and help promote action in these areas. Source: DHI GRAS / UNEP
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Annex IV. Ecosystem management tools
mitigation measures to protect freshwater
Environmental risk and environmental impact
identification tools are commonplace, they need
assessments are established management tools
to be applied by experienced independent
used to identify hazards and appropriate
experts to ensure that any conflicting
PROGRESS ON FRESHWATER ECOSYSTEMS - 2021
ecosystems at risk of multiple development pressures. While these environmental hazard
