Once we were back in the lab we proceeded to test a new setup of two layers of different sand after having let it settle overnight. We tested different depths into the two layers of sand by starting with the column deep through both sands and slowly moving the column up half an inch between trials. Our goal from setting the test up and while carrying it out was to disturb the layers as little as possible to be more sure that the interface between the layers was where we thought it was and that the layers didn't get mixed greatly with each other. A depiction of the comparison of our measured experimental values with our model values generated with MODFLOW is shown below.
Below are some images from our testing the new location at the creek and of our layered sand test.
|Matt and David|
|Matt and David (with Jessica behind on bridge)|
|Superior sand on top, F65 on the bottom|