This week we continued with our project focused on Biscayne Bay shipwrecks. We began by creating 300 meter buffers around our 5 known shipwrecks to help us understand the benthic bottom types (for example consolidated sediments vs. reef terraces). These various bottom types are shown in the map above.
The second map takes the benthic bottom and bathymetric layers we created last week and converted them to reclassified layers. For the benthic bottom types, we grouped various bottom types into 5 classes that have increasing likelihood of shipwrecks (this from external known data). For the bathymetric layer, we used natural breaks to create 5 groups representing the depths of the areas. These two reclassified layers are shows above.
The final step was combining these two reclassified layers into one layer. In doing this, we also wanted to weight one layer more highly than the other (70% benthic bottom type, 30% bathymetric). In doing this, we're saying that we think the benthic bottom type is a better indicator of where shipwrecks might occur. The final product is the map above, with areas in red indicating areas that we may want to survey in the future to locate more shipwrecks.
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