Hudson River
Below is the Hudson River region. Select a highlighted area to see the results of the model prediction if hypothetical colonies were placed in that spot. The model predicts the amount of water filtered by the oysters if a colony were restored in the region you select.
This colony would result in less than 1% of the total volume of the water in the Hudson River region being filtered over 320 hours.
Below is a graph that shows time in hours on the x-axis and volume filtered in cubic meters on the y-axis. We see the volume filtered by the colony increases throughout the residence time of about 320 hours.
Below is an image of where you selected the colony to be located for this model run.
This colony would result in 5% of the total volume of the water in the Hudson River region being filtered over 320 hours.
Below is a graph that shows time in hours on the x-axis and volume filtered in cubic meters on the y-axis. We see the volume filtered by the colony increases throughout the residence time of about 320 hours.
Below is an image of where you selected the colony to be located for this model run.
This colony would result in 10% of the total volume of the water in the Hudson River region being filtered over 320 hours.
Below is a graph that shows time in hours on the x-axis and volume filtered in cubic meters on the y-axis. We see the volume filtered by the colony increases throughout the residence time of about 320 hours.
Below is an image of where you selected the colony to be located for this model run.
This colony would result in 11% of the total volume of the water in the Hudson River region being filtered over 320 hours.
Below is a graph that shows time in hours on the x-axis and volume filtered in cubic meters on the y-axis. We see the volume filtered by the colony increases throughout the residence time of about 320 hours.
Below is an image of where you selected the colony to be located for this model run.
This colony would result in 10% of the total volume of the water in the Hudson River region being filtered over 320 hours.
Below is a graph that shows time in hours on the x-axis and volume filtered in cubic meters on the y-axis. We see the volume filtered by the colony increases throughout the residence time of about 320 hours.
Below is an image of where you selected the colony to be located for this model run.
This colony would result in 13% of the total volume of the water in the Hudson River region being filtered over 320 hours.
Below is a graph that shows time in hours on the x-axis and volume filtered in cubic meters on the y-axis. We see the volume filtered by the colony increases throughout the residence time of about 320 hours.
Below is an image of where you selected the colony to be located for this model run.
When we run the model, we first need to know how long it takes to “flush” the region we want to study with new water. That is, if we were to place floaters in the entire Hudson River shown, how long would it take for most of them to be flushed out of the river? We call that the “residence time”. The residence time will determine the length of time for which we will run the filtration model. A model simulation allows us to determine the residence time and the movie is shown below. We place hundreds of thousands of tracers, which are completely subject to the water currents, throughout the water column. Each tracer is shown as a green dot in the movie. By clicking play, you can watch as the dynamics in the Hudson slowly flush the green dots out of the river and mostly south into the Upper Bay.
Below we show a graph which describes the proportion of the green dots that are flushed out of the river over time. The y axis is the proportion remaining in the river, which is why it begins at 1 (they are all initially in the river!). The x-axis shows the time in hours that the simulation is run. As time moves on and green dots are flushed out of the river, we see the proportion decrease. After about 320 hours, the proportion is quite low, and we consider that a full residence time.
