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Sediment tools

Estimating deposited fine sediment

Quorer: a simple method for estimating deposited fine sediment

Suspended-sediment yield estimator

This national GIS ‘layer’ enables reconnaissance-scale estimation of suspended-sediment yields from New Zealand’s rivers and streams. It has been developed by NIWA in collaboration with Landcare Research.

Catchment to estuary sediment deposition tool

Based on the results from computer modelling and field studies within the Auckland region, NIWA have developed an estuary sedimentation risk tool.

Models to help manage erosion

Managing land erosion, and subsequent sedimentation in streams, lakes, and coastal areas, is a big headache for many local authorities.

Setting maximum turbidity levels for riverine fish (DSS)

NIWA research has established turbidity limits to protect fish in New Zealand rivers.