M.Sc. in Environmental Engineering SIMA 2018 New University of Lisbon, Portugal
Model to represent oyster individual growth by simulating feeding and metabolism. Model (i) partitions metabolic costs into feeding and fasting catabolism; (ii) adds allometry to clearance rate; (iii) adds temperature dependence to clearance rate; (iv) illustrates how coupled model requires a substantial volume of water (a single oyster typically clears 20-30 m3 of water in one growth cycle)
European Masters in System Dynamics 2016 New University of Lisbon, Portugal
Model to represent oyster individual growth by simulating feeding and metabolism. Builds on the core model in three ways: (i) partitions metabolic costs into feeding and fasting catabolism; (ii) adds allometry to clearance rate; (iii) adds temperature dependence to clearance rate.
Simple mass balance model for aquaculture area, based on the Vollenweider equation:
dMw/dt = Min - sMw - Mout
The model was first used in the 1960s to determine the phosphorus concentration in lakes and reservoirs for eutrophication assessment.
Direct loading replaces input concentration
The key uncertainty in these models is s, the loss of phosphorus to the sediment. Calculation of s, and the retention coefficient R used in the Dillon & Rigler model, was extensively analysed on the basis of existing literature, and the final equation used was from Canfield & Bachmann, 1981, for natural lakes.
This diagram shows the revised version of our systems modeling for PPUA 5390. Per stakeholder feedback we found a model for renewable resources which worked as the base for this.
Simple mass balance model for aquaculture area, based on the Vollenweider equation:
dMw/dt = Min - sMw - Mout
The model was first used in the 1960s to determine the phosphorus concentration in lakes and reservoirs for eutrophication assessment.
Direct loading replaces input concentration
The key uncertainty in these models is s, the loss of phosphorus to the sediment. Calculation of s, and the retention coefficient R used in the Dillon & Rigler model, was extensively analysed on the basis of existing literature, and the final equation used was from Canfield & Bachmann, 1981, for natural lakes.
