Working with AgResearch, Landcare, HortResearch and commercial companies, NIWA has been developing a simulation model to predict the effects of different land uses on stream water quality. This model is called CLUES – the Catchment Land Use for Environmental Sustainability system. This map shows the nitrate leaching risk in various parts of a selected catchment. CLUES also predicts phosphorus losses.
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NIWA – National Institute of Water and Atmospheric Research
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