Two models were created to test and evaluate the hypothesis
formulated for this research project and further understand the conditions of
the hyporheic system. The first model is
called the permeameter model. The permeameter model contains two “cylinders”
with the smaller cylinder located at the center of the large cylinder and
penetrated the soil to a depth of L. No flow boundaries are located between the
two cylinders simulating the thickness of the small cylinder. They are also
located at the very edge of the system on all sides to contain all flow in the
system. The other critical component of this model is that the Head value of
the inner cylinder is higher than the other cylinder so that the water flow
down the inner cylinder and then up to the surface of the system. MATLAB takes
these system conditions as well as the input for different soil cases and
outputs the overall system K value (hydraulic conductivity).
I need to talk to you about how much detail I need to go into about what exactly MATLAB calculates. What is necessary to say about the code and what it does?
I imagine it's what MODFLOW is doing that is primarily the confusion. MATLAB is making the grid and then feeding it into MODFLOW. Take a stab at writing it and we'll talk about it Wednesday. If you want to send me a draft with questions, I can read and comment on it tomorrow.
ReplyDeleteTwo models were created to test and evaluate the hypothesis formulated for this research project and further understand the conditions of the hyporheic system. The first model is called the permeameter model. The permeameter model contains two “cylinders” with the smaller cylinder located at the center of the large cylinder and penetrated the soil to a depth of L. No flow boundaries are located between the two cylinders simulating the thickness of the small cylinder. They are also located at the very edge of the system on all sides to contain all flow in the system. The other critical component of this model is that the Head value of the inner cylinder is higher than the other cylinder so that the water flow down the inner cylinder and then up to the surface of the system. MATLAB takes these system conditions as well as the input for different soil cases with a two layers and outputs the overall system K value (hydraulic permeability). The hydraulic permeability is calculated using the Hvorslev constant-head equation due to the constant head level present in both cylinders. The layered soil consists of a highly permeable and less permeable layer separated at a designated divide that is varied until the overall permeability reaches the desired amount.
ReplyDeleteSmall corrections to the first draft. I am going to wait to talk to you about the MODFLOW stuff.