SARF012: The development of modelling techniques to improve predictions of assimilative capacity of water bodies utilised for marine caged fish farming

Start Date: 01/07/2005
End Date: 30/9/2007
Main Contractor(s): Napier University
Other Sponsor(s):  

Objectives

1. Improve the parameterization of water exchange and internal mixing in ECE models for application to inshore sites in sea-lochs and voes (i.e. in RREs) by incorporating mixing efficiency factors.

2. Establish a ‘zone B’ scale ECE model, with appropriate exchange and mixing parameterizations, for new applications to offshore sites in more open waters.

3. Develop a time-varying ECE model which allows coupling to seasonally changing nutrient and organic inputs to zone B scale water bodies from rivers, fish-farms, and the sea.

4. Combine the inshore and offshore ECE modelling approaches with that of a dynamic version of the CSTT model and develop this into an ESV model by addition of additional water and ecological quality variables which relate to appropriate EcoQOs.

5. Test the improved parameterizations and newly developed models against new and existing data sets from sites representing a range of ecohydrodynamic conditions appropriate for fish-farming.

Summary

This proposal is a response to the SARF call for development of modelling techniques to improve predictions of assimilative capacity of water bodies utilised for marine caged fish farming. It concerns improvements in the parameterization of exchange in Equilibrium Concentration Enhancement (ECE) models, taking account of inputs of nutrients and organic matter additional to that from fish farms, integration with Comprehensive Studies Task Team (CSTT) models and development of Environmental State Vector (ESV) models in order to provide tools for the estimation of assimilative capacity on the zone 'B' or water body scale, in open waters as well as in lochs and voes.