assy diversion boxes
This is the old method used to split the water between three ditches. The front of the concrete structure faced the main ditch, and water would rise and flow over the boards to the three individual ditches. The only method of measuring water flow was to try to measure the depth of water from the top of a board to the surface of the water. This method works after a fashion, but the measurement is non-linear, meaning that a depth of two inches would be about 2.8 times as much volume as for a depth of 1 inch. It also required having numerous boards of different widths laying around, and sometimes getting lost, or floating down the ditch. We have several users for each of the three ditches, and water normally flows for 24 hours once the "boards are set". Most of these users had a tough time learning how to get a good split on water, and it usually was "I can live with that". There was also quite a lot of leakage under, around, and between the boards leading to even more inaccuracy.
