ENGINEERING LOG JAMS VELOCITY ANALYSIS Randi Mendes BACKGROUND

ENGINEERING LOG JAMS VELOCITY ANALYSIS Randi Mendes

BACKGROUND • Benefits • Bank Stabilization • Fish Habitat • Fish Feeding Randi Mendes, Oregon State University 22 August 2013

RESEARCH QUESTION Is there a Relationship between Fish Behavior and Engineered Log Jams? http: //www. sciencedaily. com/releases/2009/06/090610091224. htm Randi Mendes, Oregon State University Are there trends in the velocity profiles surrounding the log jam? 22 August 2013

METHODS �Data Collection �Velocity: Sontek Micro ADV (Acoustic Doppler Velocimeter) Devices www. sciencedirect. com Randi Mendes, Oregon State University 22 August 2013

METHODS �Velocity Analysis �Contour Plots �XY-plane, YZ-plane �Quiver (vector) Plots �XY-plane, YZ-plane Randi Mendes, Oregon State University 22 August 2013

METHODS �Contour and Quiver Plots � 3 planes �XY, YZ, XZ �Slices within each plane �XY-plane: Horizontal Slices in the Z direction �YZ-plane: Vertical Slices in the X direction �XZ-plane: Vertical Slices in the Y direction �Every 10 cm �Height Layer Randi Mendes, Oregon State University 22 August 2013

METHODS � Randi Mendes, Oregon State University 22 August 2013

• Top Picture: • XY-plane • Magnitude of Velocity in X, Y METHODS • Bottom Picture: • YZ-plane • Magnitude of Velocity in Y, Z Randi Mendes, Oregon State University 22 August 2013

METHODS �Matlab �X, Y, Z matrices �Meshgrid function �Contour function Figure 1: Contour plot of the top layer slice in the XY-plane Randi Mendes, Oregon State University 22 August 2013

METHODS �Matlab �X, Y, U, V matrices �Meshgrid function �Quiver function Figure 2: Quiver plot of the top layer slice in the XY-plane Randi Mendes, Oregon State University 22 August 2013

Above: Top Layer Slice in XY-plane Below: Third Layer Slice in XY-plane Above: Second Layer Slice in the XY-plane Below: Fourth Layer Slice in the XY-plane

Above: 1 st slice in the YZ-plane (16. 0 -16. 49) Below: 3 rd slice in the YZ-plane(17. 0 -17. 49) Above: 2 nd slice in the YZ-plane (16. 50 -16. 9) Below: 4 th slice in the YZ-plane (17. 50 -17. 49)

FINDINGS �Contour Plots �Higher values of velocity (m/s) � Isolated spots � Further from log jam � Middle layer between log jam and river ground �Lower values of velocity � Right along and close to log jam � Lower sections �Quiver Plots �Pools created in the higher sections of log jams Randi Mendes, Oregon State University 22 August 2013

QUESTIONS? ? Randi Mendes, Oregon State University 22 August 2013