Disturbance of acid sulphate soils, e.g. drains constructed around agriculture or housing developments, can expose acid sulphate soils which result in acid water run-off during rainfall events which then enter wetlands
Acid rain is another potential source of acidic water to wetland
Pressure (Source) indicators Pressure indicator:% of catchment under mining land-use Pressure indicator:% of wetland adjoining disturbed potential acid sulphate soils
Pressure (Direct) indicators Currently under investigation
Last updated: 21 February 2012
— Department of Environment and Resource Management