The presence of phosphorus (P) in natural systems such as rivers or lakes is target of great research interest because excess phosphorus can causes ecological damage like eutrophication. This excess of phosphorus can came from different sources, for example, loading from wastewaters treatment plants, agricultural or urban runoff.
This is why different investigation has focus in modeling phosphorus loadings and transport in these natural systems. Although they differ from each other for the different parameters involved like the morphological data depending on the type of system, the sources of the excess phosphorus (point sources: effluent wastewater treatment plants or diffuse sources: runoff) , and other considerations specific to each case study.
This paper shows three similar study cases, where a model was developed to determinate the loading and transport of phosphorus in a river or in a chain of lakes, but each one under different considerations changing the model of the study site, altering parameters that affect the transport and loading of phosphorus and the way the data or the analysis were developed. The three articles were published in 2013 and 2012 respectively. Now let´s establish the similarities and differences between the three revised articles.
First, Chapra et al. in 2012 simulated chloride and total phosphorus (TP) for the natural system of the Great Lakes from 1800 to the present but it does not pretend to resolve issues related to temporal o spatial scale. The importance of the study is that they wanted to improve previous studies, extending the research until 2010 to increase the quality on the simulations after the improvements of the middle 1970s established by the Great Lakes Water Quality Agreement. Second , for the case of Yuan et al. their objective was to determinate the loading of phosphorus (P) and soluble reactive phosphorus (SRP) measured from water sampling on different gagging stations across the Cuyahoga River under three different flow regimes (storm flow...