Council has built up a picture of what is happening in the waters of the Queen Charlotte Sound/Tōtaranui and Pelorus Sound/Te Hoiere with the help of NIWA scientists, their supercomputer, and the Ministry for Primary Industries.
Hydrodynamic models simulate how the tides and currents flush in and out of the Sounds, how nutrients come and go and the ecological effects of marine farming and land-uses.
The 2014 Queen Charlotte model (below) has confirmed what many fishermen, boaties and Sound residents have always believed - Tory Channel/Kura Te Au is like a vital artery connecting Queen Charlotte Sound with Cook Strait to refresh and flush out the water and nutrients
If Queen Charlotte Sound was emptied of all its 9.9 billion cubic metres of water, the amount of water through Tory Channel would refill it in about 3.8 days.
The 2015 Pelorus Sound model (below) showed that the Pelorus River is a powerful engine that drives the circulation of water throughout the entire 50 km long system.