Please use this identifier to cite or link to this item: http://hdl.handle.net/1893/2235

Appears in Collections:Aquaculture Journal Articles
Peer Review Status: Refereed
Title: A fully integrated GIS-based model of particulate waste distribution from marine fish-cage sites
Authors: Corner, Richard
Brooker, Adam
Telfer, Trevor
Ross, Lindsay
Contact Email: r.a.corner@stir.ac.uk
Keywords: fish waste dispersion
marine fish cages
cage movement
GIS modelling
Issue Date: Aug-2006
Publisher: Elsevier
Citation: Corner R, Brooker A, Telfer T & Ross L (2006) A fully integrated GIS-based model of particulate waste distribution from marine fish-cage sites, Aquaculture, 258 (41000), pp. 299-311.
Abstract: Modern Geographical Information System (GIS) offers a powerful modelling environment capable of handling large databases. It is a very suitable environment in which to develop a suite of tools designed for environmental management of aquaculture sites, including carrying capacity prediction, land–water interactions and multi-site effects. One such tool, presented here, is a fully integrated and validated particulate fish waste dispersion module which uses mass balance to estimate waste input and takes account of variable bathymetry and variable settling velocity for feed and faecal components. The model also incorporates the effect of cage movement on waste dispersion, the first such model to do so. When tidal range was low (1.67 m), the maximum movement of a 22 m diameter circular cage was 10.1 m and 7.7 m easting and northing, respectively. Highest deposition from particulate fish waste is under the cage and incorporation of cage movement increased the effective area under a cage by 72%. This reduced peak deposition measurements by up to 32% and reduced the average modelled feed and faecal settlement at the cage centre by 23% and 11%, respectively. The model was validated by comparing model predictions with observed deposition measured using sediment traps during three 2-week field trips at a fish farm on the west coast of Scotland. The mean ratio of observed to predicted waste deposition at 5–25 m from the cage centre ranged from 0.9 to 1.06, whilst under the cage the model over-predicts deposition (observed/predicted=2.21). Although far-field data was seen to be comparable the near-field discrepancies resulted in variable overall accuracy in the model. The overall accuracy based on August 2001 data was ±50.9%, on February 2002, ±72.8% and on April 2002, ±50.6%. Summarizing the data resulted in an overall average predictive accuracy of ±58.1%. © 2006 Elsevier B.V. All rights reserved.
Type: Journal Article
URI: http://hdl.handle.net/1893/2235
URL: http://www.sciencedirect.com/science/journal/00448486
DOI Link: http://dx.doi.org/10.1016/j.aquaculture.2006.03.036
Rights: Published in Aquaculture by Elsevier.
Affiliation: Aquaculture
Aquaculture
Aquaculture
Aquaculture

Files in This Item:
File Description SizeFormat 
GIS-based aquaculture waste dispersion model.pdf310.44 kBAdobe PDFView/Open


This item is protected by original copyright



Items in the Repository are protected by copyright, with all rights reserved, unless otherwise indicated.

If you believe that any material held in STORRE infringes copyright, please contact library@stir.ac.uk providing details and we will remove the Work from public display in STORRE and investigate your claim.