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Data and trends

The Excel spreadsheet below contains the source data to this indicator's graphs and any additional data.

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Regional changes in vegetation type 2002-2012

 Regional stream bank vegetation graph


Vegetation type is reported by catchment management zone in the graph below.  The Coromandel, Lake Taupō, and Upper Waikato management zones had the largest proportions of bank length with woody vegetation (56, 6 and 45 per cent respectively) in 2012.  The Central Waikato and Lower Waikato management zones had the smallest proportions of bank length with woody vegetation (16 per cent and 15 per cent respectively) in 2012.

In the Lake Taupō management zone, the amount of woody vegetation (as a proportion of bank length) has increased from 47 per cent in 2002 to 61 per cent in 2012.  In contrast, the amount of woody vegetation decreased from 32 per cent of bank length in 2007 to 22 per cent of bank length in 2012 in the Waipā management zone.

Change in vegetation by management zone 2002-2012

Stream bank vegetation by management zone - graph

Similar to the region as a whole, the amount of woody vegetation (as a proportion of bank length fenced) for both dairy and drystock land uses had not changed significantly over the 2002-2012 period.

Change in vegetation pastoral land use 2002-2012

Stream bank vegetation graph - by land use