Wilson's Bay marine farm dispersal modelling

Results from the modelling are presented to assist with the development of monitoring programmes and aid resource management for the existing and proposed marine farms within the Firth of Thames. This study examines the migration of water from Wilson's Bay on the Coromandel Peninsula just south of Coromandel Harbour. This will enable monitoring sites to be correctly located in order to best measure the effects of proposed extensions to the existing mussel farms at Wilson's Bay. Purpose: To help with future planning and monitoring of marine farms.

A hydrodynamic model and a plume dispersion model predict water circulation and subsequent migration within the Hauraki Gulf and the Firth of Thames. The hydrodynamic model accounts for water movement at various depths generated by tides, winds, and density gradients resulting from temperature variation. Data presented includes: bathymetry, wind, temperature gradients/distribution, surface tidal currents, and movement of a plume from Wilson's Bay marine farms under various wind conditions.

Wilson's Bay and Firth of Thames/Hauraki Gulf

Wilson's Bay – 2726260, 6476246, NZMG, 1:2,000, AREA Firth of Thames/Hauraki Gulf – 2725589, 6453054, NZMG, 1:20,000, AREA

N/A

Hydrodynamic flow model (3DD) and Plume Dispersion Model (POL3DD) One off predictive model

The results from the modelling can be used to determine the likely extent and concentration of a conservative (non-decaying) tracer under various wind and stratification conditions. Any material that behaves in a non-conservative manner (ie. nitrogen, shell material or chlorophyll) will alter both the extent of the plume and the predicted concentration levels presented in this report. Gaps in collection: Not reported Data quality: Not reported Attribute accuracy: Not reported Completeness: Not reported

report, maps, electronic Digital Format: MS Word, graphic modelling?

Consult Waikato Regional Council

Finished