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  • Added 23 Apr 2018
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This layer depicts estimated sediment/soil loss across New Zealand and was created using the NZeem erosion model. Erosion control is defined as the prevention of soil loss by an ecosystem. NZeem has been calibrated from sediment discharges measured in New Zealand rivers (Dymond et al., 2010). This model estimates the long-term mean erosion rate from all sources of erosion, both mass-movement and surficial, and accounts for all sizes of rainfall events. The model was run on the national datasets of rainfall, erosion terrains, and land cover to produce a national 1:50,000 scale map of long-term mean erosion rates. Dymond et al. (2010) assessed the accuracy of the model by comparing predictions of specific sediment discharge (assuming sediment delivery ratio of 1 everywhere) with available measurements and obtained a model efficiency of 0.64.

License

Creative Commons Attribution-Noncommercial-No Derivative Works 3.0

You may not use this work for commercial purposes.

You must attribute the creator in your own works.

You must not release derivatives of this work.

Information

Tagsdischarge, ecosystem, ecosystems, erosion, sediment, soil
RegionsNew Zealand
MetadataISO 19115/19139, Dublin Core

Technical Details

Layer ID 95388
Data type Grid
Resolution 100.000m
Services Raster Query API, Catalog Service (CS-W), data.govt.nz Atom Feed

History

Added 23 Apr 2018
Last updated 23 Apr 2018
Revisions 1 - Browse all revisions
Current revision Imported on April 23, 2018 from GeoTIFF in NZGD2000 / New Zealand Transverse Mercator 2000.
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