The client was having erosion issues and was looking to improve the existing contour banks. They wanted the field smoothed out and they wanted the contour banks parallel as possible.
Below is the Existing Topography along with the results from the Runoff Analysis. The Runoff Analysis is simulated with a 1 in 10 year rainfall event of duration up to 3 hours. The arrows on the Runoff Analysis show the water velocity building up as the water runs down the field. Without the contour banks, the water velocity becomes erosive over most of the pivot, thus requiring the need for the contour banks.