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Collaborations Limited (‘Collaborations’) have developed RUSLE (Revised Universal Soil Loss Equation) and Sediment Delivery Ratio (SDR) spatial models at high resolution (1m2) using LiDAR and other spatial data for the Banks Peninsula Ward and city side of the Port Hills for Christchurch City Council and Environment Canterbury.
The spatial risk models are intended to map priority areas for rural erosion control and to help plan mitigations. They do not account for mass-movement erosion (e.g. landslides or tunnel-gullies) or streambank erosion processes. The models are not intended for erosion risk assessments within urban areas or for infrastructure developments. For a description of model inputs, assumptions, and limitations, see the technical memo 'Banks Peninsula Erosion Risk Mapping' (Easton, 2025). |
| summary:
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Collaborations Limited (‘Collaborations’) have developed RUSLE (Revised Universal Soil Loss Equation) and Sediment Delivery Ratio (SDR) spatial models at high resolution (1m2) using LiDAR and other spatial data for the Banks Peninsula Ward and city side of the Port Hills for Christchurch City Council and Environment Canterbury.
The spatial risk models are intended to map priority areas for rural erosion control and to help plan mitigations. They do not account for mass-movement erosion (e.g. landslides or tunnel-gullies) or streambank erosion processes. The models are not intended for erosion risk assessments within urban areas or for infrastructure developments. For a description of model inputs, assumptions, and limitations, see the technical memo 'Banks Peninsula Erosion Risk Mapping' (Easton, 2025). |
| extent:
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[[172.373416857472,-43.9030057411268],[173.13171082715,-43.5567007515806]] |
| accessInformation:
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Collaborations (2025) |
| thumbnail:
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thumbnail/thumbnail.png |
| maxScale:
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1.7976931348623157E308 |
| typeKeywords:
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["ArcGIS","ArcGIS Server","Data","Map Service","Service"] |
| description:
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<div style='text-align:Left;font-size:12pt'><p><span>The RUSLE is based on four primary sub-factors, accounting for rainfall erosivity, soil erodibility, topography, and land cover. Additional factors can also be applied to model sediment conservation practices, and the RUSLE allows for factors to be manipulated to test scenarios such as land use change or climate change. While the RUSLE is widely used to represent catchment sediment loads, it specifically models surficial erosion (sheet, rill, and inter-rill processes) and does not explicitly account for sediment loads associated with streambank erosion or mass-movement processes such as gullying or landsliding. </span></p><p><span /></p><p><span>To estimate the proportion of the modelled RUSLE sediment load delivered to streams, we have developed a spatial sediment delivery ratio (SDR) model based on the Index of Connectivity (IC) approach.</span></p><p><span /></p><p><span>For a description of model inputs, assumptions, and limitations, see the technical memo 'Banks Peninsula Erosion Risk Mapping' (Easton, 2025).</span></p></div> |
| licenseInfo:
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| catalogPath:
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|
| title:
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RUSLE_Erosion2025 |
| type:
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Map Service |
| url:
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|
| tags:
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["Erosion","RUSLE","Sediment","Banks Peninsula","Port Hills","Christchurch"] |
| culture:
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en-NZ |
| portalUrl:
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|
| name:
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RUSLE_Erosion2025 |
| guid:
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C748FB7B-B97A-4700-A4BB-D33C1E54F12C |
| minScale:
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0 |
| spatialReference:
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NZGD_2000_New_Zealand_Transverse_Mercator |