/FlumeGeometry.txt/ contains a point list along the channel centerline, right bank, and left bank.

CLx (m) - channel centerline x coordinate in meters
CLy (m) - channel centerline y coordinate in meters
Rx (m) - right wall x coordinate in meters
Ry (m) - right wall y coordinate in meters
Lx (m) - left wall x coordinate in meters
Ly (m) - left wall y coordinate in meters