"Long-term soil erosion is the average mass of soil lost per square kilometre per year (tonnes/km2/year) over a period of approximately 10 years. It is extrapolated from long-term measurements of sediment load in rivers. Extrapolation is based on mean annual rainfall, rock type, and land cover. The total sediment in rivers (tonnes/year) for a particular region is the sum of all soil erosion over the entire region (Dymond et al, 2010). Soil-erosion rates were calculated to 2012.
This data set relates to the "Estimated long-term soil erosion" measure on the Environmental Indicators, Te taiao Aotearoa website."
|Services||Raster Query API, Catalog Service (CS-W), data.govt.nz Atom Feed|
DATA SOURCE: Aqualinc Research Limited
[Technical report available at environment.govt.nz/publications/national-irrigate...]
Adapted by Ministry for the Environment and Statistics New Zealand to provide for environmental reporting transparency
The spatial data covers all mainland regions of New Zealand, with the exception of Nelson, which is not believed to contain significant irrigated areas. The spatial dataset is an update of the national dataset that was first created in 2017. The current update has incorporated data from the 2019 – 2020 irrigation season.
More information on this dataset and how it relates to our environmental reporting indicators and topics can be found in the attached data quality pdf.
|Data type||Vector multipolygon||Feature count||39859|
|Services||Vector Query API, Web Feature Service (WFS), Catalog Service (CS-W), data.govt.nz Atom Feed|