Throughout this project, I have encountered many problems and dilemmas. However, from the rudimentary analysis of tides on water pollution movement, you can see how tidal movement influence the suspended water pollution. Furthermore, depending on the location, the released pollution may only travel in certain area such as point source #6, where one can deduce that the concentration of the pollutants may be greater than others. It more or less run along the general perception of how things go under the influences of tides. However, as demonstrated by this project, what was attempted is a rough approximation. There are other factors to be considered like wind vectors and a more complex  tidal movements than the simple in-and-out pattern. In addition, the strength of tides are not the same with tides being stronger in full moon events.

      In my methodology, only least-cost paths were used. No other permuation of possible paths were seen. As a result , in comparing the flows for low tide and high tide, the network of paths look eerily similar. In reality, we know that nature is more random and the polltuion may go a similar but different route. An attempt was made to find these other permutations but this failed. Along with this, in the project, the nature of the pollution is suspended or at the bottom of False Creek. More would have been done if a cost surface could have been made for water-bourne  pollutants. However, this would have llikely required wind data which I do not have. Furthermore, wind data itself would be likely more variable than tidal currents.

       There were problems with the data. In the hydrolographic maps, I found two versions. One from 1964 and the other from 1989. Despite being closer to the time of this industrial activity, the 1964 map was not chosen under the premise that it did not match the general shape of the local areas layer from the City of Vancouver. A few years after the 1964 map,  a medium portion of the eastern end of False Creek was covered over. In order to be more consistent , the 1989 map was chosen.



    In addition, I had some doubts with the fire insurance plans. During my research, the fire insurance maps were large sheets of slightly mould canvas. Due to the cost of mapping perhaps, new maps were not made. Instead, they reprinted the maps from 1948 and made changes to it. Buildings that no longer existed were scratched out with a pencil. Changes in the buildings via tenants or rennovations were made by drawing it on a separate piece of paper and sticking it on top of the original building. Some canvas were patchworks.