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Mean annual suspended sediment yields and net suspended sediment loads modelled using SedNetNZ in the Wairoa catchment

Description

Mean annual suspended sediment yields (t km-2 yr-1) and net suspended sediment loads (t yr-1) modelled using SedNetNZ for all RECv2.4 segments for a baseline and best-efforts mitigation scenario in the Wairoa catchment.

Sediment loads are modelled under contemporary climate and future climate change projections using 6 regional climate change models (RCMs) reported as min, med, and max across 4 representative concentration pathways (RCPs), RCP2.6, RCP4.5, RCP6.0 and RCP8.5.

 

Date: September 2023 Version: v1

Owner: Manaaki Whenua – Landcare Research

Contact: Manaaki Whenua – Landcare Research (Simon Vale, Hugh Smith)

 

Link to report / paper

Smith H., Vale, S., Neverman, A., Robson-Williams, M., Harris, L. 2022. Climate change impacts on suspended sediment loads in the Wairoa catchment, Hawke's Bay. Manaaki Whenua – Landcare Research Contract Report LC4121 for Our Land & Water National Science Challenge.

Vale S., Smith H., Robson-Williams, M., Harris, L. 2023. Effects of climate change and erosion mitigation on suspended sediment loads and visual clarity in the Wairoa catchment, Hawke's Bay. Manaaki Whenua – Landcare Research Contract Report LC4274 for Our Land & Water National Science Challenge.

 

Preview Image

 

Dataset attributes

Spatial extent Wairoa catchment, Hawke's Bay
Spatial resolution REC2.4 digital stream network watershed polygons
Temporal extent contemporay (present); mid-century (2040); late (2090) century
Temporal resolution
Evaluation method (Validation)
Evaluation result (Numeric)
Evaluation result (Categorical)
Uncertainty method
Uncertainty data format (Numeric)
Uncertainty data format (Categorical)

 

Methodology

The scenarios and methods used are described in the following reports:

 

Fitness for purpose / limitations

This table indicates whether the dataset is suitable for different types of questions at different scales.

Note: Users should carefully consider their purpose as this dataset may not be suitable.

Operational Absolute Relative Screening/scoping
Block/farm Maybe Maybe Maybe Maybe
Multi-farms(5+) Yes Yes Yes Yes
Catchment Yes Yes Yes Yes
National/regional Maybe Maybe Maybe Maybe
Caveat(s) Refer to the two accompanying reports for detailed information on model assumptions and limitations. Key assumptions relate to the representation of erosion processes, climate change projections and their impacts on erosion rates and sediment loads, as well as the effectiveness of the erosion mitigations represented in the best-efforts scenario.

Data and Resources