A novel substance flow analysis model for analysing multi-year phosphorus flow at the regional scale.

Achieving sustainable management of phosphorus (P) is crucial for both global food security and global environmental protection. In order to formulate informed policy measures to overcome existing barriers of achieving sustainable P management, there is need for a sound understanding of the nature and magnitude of P flow through various systems at different geographical and temporal scales. So far, there is a limited understanding on the nature and magnitude of P flow over multiple years at the regional scale. In this study, we have developed a novel substance flow analysis (SFA) model in the MATLAB/Simulink® software platform that can be effectively utilized to analyse the nature and magnitude of multi-year P flow at the regional scale. The model is inclusive of all P flows and storage relating to all key systems, subsystems, processes or components, and the associated interactions of P flow required to represent a typical P flow system at the regional scale. In an annual time step, this model can analyse P flow and storage over as many as years required at a time, and therefore, can indicate the trends and changes in P flow and storage over many years, which is not offered by the existing regional scale SFA models of P. The model is flexible enough to allow any modification or the inclusion of any degree of complexity, and therefore, can be utilized for analysing P flow in any region around the world. The application of the model in the case of Gippsland region, Australia has revealed that the model generates essential information about the nature and magnitude of P flow at the regional scale which can be utilized for making improved management decisions towards attaining P sustainability. A systematic reliability check on the findings of model application also indicates that the model produces reliable results.

[1]  David J. Pannell,et al.  Agricultural land management strategies to reduce phosphorus loads in the Gippsland Lakes, Australia , 2012 .

[2]  Elena M. Bennett,et al.  The role of diet in phosphorus demand , 2012 .

[3]  Stuart White,et al.  Life's Bottleneck: Sustaining the World's Phosphorus for a Food Secure Future , 2014 .

[4]  Zengwei Yuan,et al.  A bottom–up model for quantifying anthropogenic phosphorus cycles in watersheds , 2014 .

[5]  Stephen Morse,et al.  Sustainable phosphorus management - a global transdisciplinary roadmap , 2015 .

[6]  Lucy Burkitt,et al.  Accounting for Nutrients on Australian Dairy Farms , 2008 .

[7]  H. Paerl,et al.  Nitrogen and phosphorus inputs control phytoplankton growth in eutrophic Lake Taihu, China , 2010 .

[8]  Zengwei Yuan,et al.  Understanding the anthropogenic phosphorus pathway with substance flow analysis at the city level. , 2011, Journal of environmental management.

[9]  Rubel Biswas Chowdhury,et al.  Modelling multi-year phosphorus flow at the regional scale: the case of Gippsland, Australia , 2015 .

[10]  Jessica R. Corman,et al.  Sustainability Challenges of Phosphorus and Food: Solutions from Closing the Human Phosphorus Cycle , 2011 .

[11]  Helmut Rechberger,et al.  Practical handbook of material flow analysis , 2003 .

[12]  D. Schindler,et al.  Eutrophication science: where do we go from here? , 2009, Trends in ecology & evolution.

[13]  Ayman Elshkaki,et al.  Systems analysis of stock buffering : development of a dynamic substance flow-stock model for the identification and estimation of future resources, waste streams and emissions , 2007 .

[14]  James B. Cathcart,et al.  World Phosphate Reserves and Resources , 2015 .

[15]  Karin L. Lemkau,et al.  Floating oil-covered debris from Deepwater Horizon: identification and application , 2012 .

[16]  Daniel J. Conley,et al.  Ecology: Save the Baltic Sea , 2012, Nature.

[17]  D. Vaccari.  Phosphorus: a looming crisis. , 2009, Scientific American.

[18]  M. Arora,et al.  A review of recent substance flow analyses of phosphorus to identify priority management areas at different geographical scales , 2014 .

[19]  Rachelle Lombardi,et al.  The future distribution and production of global phosphate rock reserves , 2011 .

[20]  Hung Nguyen-Viet,et al.  Assessing nutrient fluxes in a Vietnamese rural area despite limited and highly uncertain data , 2011 .

[21]  Dana Cordell,et al.  Sustainable Use of Phosphorus , 2010 .

[22]  D. Cordell,et al.  The story of phosphorus: Global food security and food for thought , 2009 .

[23]  Zengwei Yuan,et al.  Anthropogenic phosphorus flow analysis of Lujiang County, Anhui Province, Central China , 2011 .

[24]  H. Paerl,et al.  Controlling Eutrophication: Nitrogen and Phosphorus , 2009, Science.

[25]  Zengwei Yuan,et al.  Anthropogenic phosphorus flow analysis of Hefei City, China. , 2010, The Science of the total environment.

[26]  Zengwei Yuan,et al.  Eutrophication mitigation strategies: perspectives from the quantification of phosphorus flows in socioeconomic system of Feixi, Central China , 2012 .

[27]  S. Carpenter.  Phosphorus control is critical to mitigating eutrophication , 2008, Proceedings of the National Academy of Sciences.

[28]  Paul H. Brunner,et al.  Substance Flow Analysis as a Decision Support Tool for Phosphorus Management , 2010 .